Tue·Dec 3, 2024Tuesday·December 3, 2024

1. 01*

   Spectra of $\Lambda$ and $\Sigma$ Baryons under Screened Potential

   Chandni Menapara🇮🇳 · Ajay Kumar Rai🇮🇳

   The light, strange baryons have been studied through various approaches and attempted to be looked for rigorously in experiments. The screened potential has been applied to heavy baryon sector as well as meson systems in earlier works. Here, this article attempts to compare the results for linear and screened potential for light strange baryons. Also, the Regge trajectories depict the linear nature.

   hep-phnucl-thInt.J.Mod.Phys.A(2025)·0 citations
2. 02*

   The impact of LHC precision measurements of inclusive jet and dijet production on the CTEQ-TEA global PDF fit

   Alim Ablat🇨🇳 · Sayipjamal Dulat🇨🇳 · Tie-Jiun Hou🇨🇳 · Joey Huston🇺🇸 · Pavel Nadolsky🇺🇸 · Ibrahim Sitiwaldi🇨🇳 · Keping Xie🇺🇸 · C.-P. Yuan🇺🇸

   In this study, we investigate the impact of new LHC inclusive jet and dijet measurements on parton distribution functions (PDFs) that describe the proton structure, with a particular focus on the gluon distribution at large momentum fraction, $x$, and the corresponding partonic luminosities. We assess constraints from these datasets using next-to-next-to-leading-order (NNLO) theoretical predictions, accounting for a range of uncertainties from scale dependence and numerical integration. From the scale choices available for the calculations, our analysis shows that the central predictions for inclusive jet production show a smaller scale dependence than dijet production. We examine the relative constraints on the gluon distribution provided by the inclusive jet and dijet distributions and also explore the phenomenological implications for inclusive $H$, $t\bar{t}$, and $t\bar{t}H$ production at the LHC at 14 TeV.

   hep-phhep-exhep-latPRD(2025)·8 citations
3. 03*

   A Non-linear Representation of General Scalar Extensions of the Standard Model for HEFT Matching

   Huayang Song🇰🇷 · Xia Wan🇨🇳

   We introduce a non-linear representation of ultraviolet~(UV) complete model, $U$ representation, under which matching HEFT to general scalar extensions of the standard model is straightforward. The main idea is to express a scalar multiplet in its linear form rotated by $U$ matrices, where $U$ matrix is exponential form of Goldstones based on Pauli matrices and meanwhile is a special $SU(2{)}_L$ rotation. All together the doublet is expressed in $U$ matrix multiplying a doublet column or bidoublet matrix, which is composed of physical Higgs. We show a complete matching between HEFT and real triplet extension. Meanwhile, under tensor notation, we give $U$ representation for general scalar extensions.

   hep-phJHEP(2025)·5 citations
4. 04*

   Helicity correlation of neighboring dihadron

   Fei Huang🇨🇳 · Tianbo Liu🇨🇳 · Yu-Kun Song🇨🇳 · Shu-Yi Wei🇨🇳

   The spin correlation of final-state hadrons provides a novel platform to explore the hadronization mechanism of polarized partons in unpolarized high-energy collisions. In this work, we investigate the helicity correlation of two hadrons originating from the same single parton. The production of such a dihadron system is formally described by the interference dihadron fragmentation function, in which the helicity correlation between the two hadrons arise from both the long-distance nonperturbative physics and the perturbative QCD evolution. Beyond the extraction of the dihadron fragmentation function, we demonstrate that it is also a sensitive observable to the longitudinal spin transfer, characterized by the single hadron fragmentation function $G_{1L}$. This intriguing connection opens up new opportunities for understanding the spin dynamics of hadronization and provides a complementary approach to corresponding studies using polarized beams and targets.

   hep-phhep-exPLB(2025)·12 citations
5. 05*

   Impact of nonextensivity on the transport coefficients of strongly interacting QCD matter

   Dhananjay Singh🇮🇳 · Arvind Kumar🇮🇳

   Tsallis nonextensive statistics is applied to study the transport coefficients of strongly interacting matter within the Polyakov chiral SU(3) quark mean field model (PCQMF). Nonextensivity is introduced within the PCQMF model through a dimensionless $q$ parameter to examine the viscous properties such as shear viscosity ($\eta$), bulk viscosity (${\zeta }_b$), and conductive properties, including electrical conductivity (${\sigma }_{el}$) and thermal conductivity ($\kappa$). Additionally, some key thermodynamic quantities relevant to the transport coefficients, like the speed of sound ($c_{sq}^2$) and specific heat at constant volume ($c_{vq}$), are calculated. The temperature dependence of the transport coefficients is explored through a kinetic theory approach with the relaxation time approximation. The results are compared to the extensive case where $q$ approaches 1. The nonextensive $q$ parameter is found to have a significant effect on all transport coefficients. We find that the nonextensive behaviour of the medium enhances both specific shear viscosity $\eta /s_q$ as well as conductive coefficients ${\sigma }_{el}/T$ and $\kappa /T^2$. In contrast, the normalised bulk viscosity ${\zeta }_b/s_q$ is found to decrease as the nonextensivity of the medium increases. We have also studied the transport coefficients for finite values of chemical potentials. The magnitude of $\eta$, ${\sigma }_{el}$, and $\kappa$ increases at lower temperatures while $\zeta$ is found to decrease for systems with non-zero chemical potential.

   hep-phnucl-thCPC(2025)·1 citation
6. 06*

   Extension of the integrated hydrokinetic model to nuclear collision energies relevant for the RHIC Beam-Energy Scan program and the research program at GSI-FAIR

   Musfer Adzhymambetov🇺🇦 · Yuri Sinyukov🇺🇦

   The present work is devoted to developing the integrated hydrokinetic model (iHKM) for relativistic nucleus-nucleus collisions. While the previous cycle of works on this topic focused on ultra-relativistic collisions at the top RHIC and different LHC energies, the current work addresses relativistic collisions at the lower energies, specifically ranging from approximately 2 to 50 GeV per nucleon pair in the center-of-mass colliding system. In such collisions, the formation times for the initial state of dense matter can be up to three orders of magnitude longer than those in ultra-relativistic collisions. This difference reflects a fundamentally distinct nature and formation process, particularly regarding the possible stages of initial state evolution, including thermalization (which may be only partial at very low collision energies), subsequent hydrodynamic expansion, and the final transition of matter evolution into a hadronic cascade. These stages, which are fully realized in ultra-relativistic reactions, can also occur within the energy range of BES RHIC, albeit with distinct time scales. This publication not only advances the theoretical development of iHKM (referred to, if necessary, as the {\it{extended}} version of the integrated Hydrokinetic Model, iHKM{\it{e}}), but also provides examples of model applications for calculating observables. A systematic description across a wide range of experimental energies, which is preliminary yet quite satisfactory, for spectra, flow, and femtoscopy, will follow this study.

   hep-phnucl-thPRC(2025)·3 citations
7. 07*

   On the CP Nature of the `95 GeV' Anomalies

   Tanmoy Mondal🇮🇳 · Stefano Moretti🇬🇧 · Prasenjit Sanyal🇰🇷

   Under the assumption that the various evidences of a `95 GeV' excess, seen in data at the Large Electron Positron (LEP) collider as well as the Large Hadron Collider (LHC), correspond to actual signals of new physics Beyond the Standard Model (BSM), we characterise the underlying particle explaining these anomalies in terms of its Charge/Parity (CP) quantum numbers. In doing so, we use ${\chi }^2$ fits to test the CP-even (scalar) and CP-odd (pseudoscalar) hypotheses and superpositions of these, thus under the assumption of a spin-0 resonance. This is done through the exploitation of ${\tau }^{+}{\tau }^{-}$ decays, in both their fully hadronic and semi-leptonic modes, in a model-independent way, so that our approach enables one to test a variety of BSM hypotheses, having proven here that the High-Luminosity LHC (HL-LHC) will be in a position to disentangle the CP nature of such a new particle within $\pm (0.27-0.47)$ radians of the true hypothesis at $90\%$ Confidence Level (CL), depending on the assumed background systematics.

   hep-phhep-exPLB(2026)·12 citations
8. 08*

   Analysis of the form factors of $B_c\to D^{(\ast )}$, $D_s^{(\ast )}$ and their nonleptonic decays

   Bin Wu🇨🇳 · Guo-Liang Yu🇨🇳 · Zhi-Gang Wang🇨🇳 · Ze Zhou🇨🇳 · Jie Lu🇨🇳

   This article is devoted to calculating the form factors of $B_c\to D^{\ast }$, $B_c\to D$, $B_c\to D_s^{\ast }$ and $B_c\to D_s$ transitions in the framework of three-point QCD sum rules. At the QCD side, the contributions of $⟨\overline{q}q⟩$, $⟨\overline{q}{g}_s\sigma Gq⟩$, $⟨g_s^2{G}^2⟩$, $⟨f^3{G}^3⟩$ and $⟨\overline{q}q⟩⟨g_s^2{G}^2⟩$ are taken into account. With the obtained form factors, the decay widths and branching ratios of several two-body nonleptonic decay processes $B_c\to {\eta }_c{D}^{\ast }$, ${\eta }_{c}D$, $J/\psi D^{\ast }$, $J/\psi D$, ${\eta }_c{D}_s^{\ast }$, ${\eta }_c{D}_s$, $J/\psi D_s^{\ast }$ and $J/\psi D_s$ are predicted. These results about the form factors and decay properties of $B_c$ meson provide useful information for us to study the heavy-quark dynamics.

   hep-phCPC(2025)·1 citation
9. 09*

   Correlating $A\to \gamma \gamma$ with electric dipole moments in the two Higgs doublet model in light of the diphoton excesses at 95 GeV and 152 GeV

   Sumit Banik🇨🇭 · Guglielmo Coloretti🇨🇭 · Andreas Crivellin🇨🇭 · Howard E. Haber🇺🇸

   We examine the correlations between new scalar boson decays to photons and electric dipole moments (EDMs) in the CP-violating flavor-aligned two-Higgs-doublet model (2HDM). It is convenient to work in the Higgs basis $\{H_1,H_2\}$ where only the first Higgs doublet field $H_1$ acquires a vacuum expectation value. In light of the LHC Higgs data, which agree well with Standard Model (SM) predictions, it follows that the parameters of the 2HDM are consistent with the Higgs alignment limit. In this parameter regime, the observed SM-like Higgs boson resides almost entirely in $H_1$, and the other two physical neutral scalars, which reside almost entirely in $H_2$, are approximate eigenstates of CP (denoted by the CP-even $H$ and the CP-odd $A$). In the Higgs basis, the scalar potential term ${\bar{Z}}_7{H}_1^{†}{H}_2{H}_2^{†}{H}_2+h.c.$ governs the charged-Higgs loop contributions to the decay of $H$ and $A$ to photons. If $\text{Re }{\bar{Z}}_7\text{Im }{\bar{Z}}_7\ne 0$, then CP-violating effects are present and allow for an $H^{+}{H}^{-}A$ coupling, which can yield a sizable branching ratio for $A\to \gamma \gamma$. These CP-violating effects also generate non-zero EDMs for the electron, the neutron and the proton. We examine these correlations for the cases of $m_A=95$ GeV and $m_A=152$ GeV where interesting excesses in the diphoton spectrum have been observed at the LHC. These excesses can be explained via the decay of $A$ while being consistent with the experimental bound for the electron EDM in regions of parameter space that can be tested with future neutron and proton EDM measurements. This allows for the interesting possibility where the 95 GeV diphoton excess can be identified with $A$, while $m_H\simeq 98$ GeV can account for the best fit to the LEP excess in $e^{+}{e}^{-}\to ZH$ with $H\to b\bar{b}$.

   hep-phhep-exPRD(2025)·26 citations
10. 10*

    Quantum thermalization of Quark-Gluon Plasma

    Shile Chen🇨🇳 · Li Yan🇨🇳 · Shuzhe Shi🇨🇳

    The thermalization of quark gluon plasma created in relativistic heavy-ion collisions is a crucial theoretical question in understanding the onset of hydrodynamics, and in a broad sense, a key step to the exploration of thermalization in isolated quantum systems. Addressing this problem theoretically, in a first principle manner, requires a real-time, non-perturbative method. To this end, we carry out a fully quantum simulation on a classical hardware, of a massive Schwinger model, which well mimics QCD as it shares the important properties such as confinement and chiral symmetry breaking. We focus on the real-time evolution of the Wigner function, namely, the two-point correlation function, which approximates quark momentum distribution. In the context of the eigenstate thermalization hypothesis and the evolution of entropy, our solution reveals the emergence of quantum thermalization in quark-gluon plasma with a strong coupling constant, while thermalization fails progressively as a consequence of the gradually increased significance of quantum many-body scar states in a more weakly coupled system. More importantly, we observe the non-trivial role of the topological vacuum in thermalization, as the thermalization properties differ dramatically in the parity-even and parity-odd components of the Wigner function.

    hep-phnucl-thquant-ph15 citations
11. 11*

    Angular modulation of nonlinear Breit-Wheeler yield by vacuum dichroism

    Jia-Ding Chen🇨🇳 · Ya-Nan Dai🇨🇳 · Kai-Hong Zhuang🇨🇳 · Jing-Jing Jiang🇨🇳 · Baifei Shen🇨🇳 · Yue-Yue Chen🇨🇳

    Vacuum polarization is numerically investigated for the interaction between a GeV electron beam and a counterpropagating ultraintense laser pulse in the quantum radiation dominated-regime (QRDR). We identify a signal of vacuum polarization in pair density using a straightforward one-stage setup, circumventing the challenge of preparations of highly polarized probe photons or precise measurements of photon polarization. In our scheme, most electrons are scattered in the direction of laser propagation while emitting substantial linearly polarized gamma photons. These photons undergo vacuum birefringence and dichroism before decaying into electron-positron pairs via the nonlinear Breit-Wheeler process. We demonstrate that vacuum dichroism enhances the purity of linear polarization, which suppresses the overall yield of electron-positron pairs and allows energetic photons to penetrate deeper into the laser pulse. The pairs produced by these energetic photons are more likely to be deflected into small-angle regions rather than being reflected, leading to an enhancement of pair yield in forward scattering. The difference in positron yield may have potential applications in measuring vacuum polarization effect in future laser-particle experiments.

    hep-phPRD(2025)·3 citations
12. 12*

    Plasmon-polaritons on a single electron

    I.M. Akimov🇷🇺 · P.O. Kazinski🇷🇺 · A.A. Sokolov🇷🇺

    The explicit expression for the photon polarization operator in the presence of a single electron is found in the $in$-$in$ formalism in the one-loop approximation out of the photon mass-shell. This polarization operator describes the dielectric permittivity of a single electron wave packet in coherent scattering processes. The plasmons and plasmon-polaritons supported by a single electron wave packet are described. The two limiting cases are considered: the wavelength of the external electromagnetic field is much smaller than the typical scale of variations of the electron wave packet and the wavelength of the external electromagnetic field is much larger than the size of the electron wave packet. In the former case, there are eight independent plasmon-polariton modes. In the latter case, the plasmons boil down to the dynamical dipole moment attached to a point electron. Thus, in the infrared limit, the electron possesses a dynamical electric dipole moment manifesting itself in coherent scattering processes.

    hep-phphysics.plasm-phquant-phPRD(2025)·4 citations
13. 13*

    Two-loop master integrals for $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ process with account of electron mass

    Roman N. Lee🇷🇺

    We calculate a subset of two-loop master integrals relevant for the differential cross section of $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ process. We consider only those families for which the account of the electron mass $m$ is necessary. Our results have the form of the Frobenius series in $m$ with coefficients expressed via Goncharov's polylogarithms.

    hep-phJHEP(2025)·4 citations
14. 14*

    Neutrino Diffusion within Dark Matter Spikes

    Motoko Fujiwara🇩🇪 · Gonzalo Herrera🇺🇸 · Shunsaku Horiuchi🇺🇸

    Multi-messenger observations of astrophysical transients provide powerful probes of the underlying physics of the source as well as beyond the Standard Model effects. We explore transients that can occur in the vicinity of supermassive black holes at the center of galaxies, including tidal disruption events (TDEs), certain types of blazars, or even supernovae. In such environments, the dark matter (DM) density can be extremely high, resembling a dense spike or core. We study a novel effect of neutrino diffusion sustained via frequent scatterings off DM particles in these regions. We show that for transients occurring within DM spikes or cores, the DM-neutrino scattering can delay the arrival of neutrinos with respect to photons, but this also comes with a suppression of the neutrino flux and energy loss. We apply these effects to the specific example of TDEs, and demonstrate that currently unconstrained parameter space of DM-neutrino interactions can account for the sizable $O$(days) delay of the tentative high-energy neutrinos observed from some TDEs.

    hep-phastro-ph.CO11 citations
15. 15*

    Transverse densities of the energy-momentum tensor and the gravitational form factors the pion

    Wojciech Broniowski🇵🇱 · Enrique Ruiz Arriola🇪🇸

    We present general features of the transverse densities of the stress-energy-momentum tensor ${\Theta }^{\mu \nu }$ in the pion. We show positivity of the transverse density of ${\Theta }^{++}$ (analogous to the positivity of the transverse density of the electromagnetic current $J^{+}$) and discuss its consequences in conjunction with analyticity and quark-hadron duality, as well as the connection to $\pi \pi$ scattering at low energies. Our analysis takes into account the perturbative QCD effects, dominating at high momenta (or low transverse coordinate $b$), the effects of Chiral Perturbation Theory, dominating at low momenta (high $b$), and meson dominance in the intermediate region. We incorporate constraints form analyticity, leading to sum rules for the spectral densities of the corresponding form factors, which {\em i.a.} are relevant for the high-momentum (or the low-$b$) asymptotics. With the obtained high- and low-$b$ behavior, we deduce that the scalar (trace-anomaly) gravitational transverse density ${\Theta }_{\mu }^{\mu }(b)$ must change sign, unlike the case of the positive definite $J^{+}(b)$ or ${\Theta }^{++}(b)$. We also discuss the transverse pressure in the pion, which is positive and singular at low $b$, and negative at high $b$, in harmony with the stability criterion. The results for the form factors for space-like momenta are compared to the recent lattice QCD data.

    hep-phhep-latActa Phys.Polon.B(2025)·6 citations
16. 16*

    Non-Perturbative Contributions to Low Transverse Momentum Drell-Yan Pair Production Using the Parton Branching Method

    Nataša Raičević🇲🇪

    The non-perturbative processes - the internal transverse motion of partons inside hadrons, which gives rise to their intrinsic transverse momentum (intrinsic-kT) - and multiple soft gluon emissions that need to be resummed, are dominant contributions to the low transverse momentum of the Drell-Yan (DY) pair cross section. Therefore, this part of the DY spectra serves as a powerful tool for a better understanding of such processes, which is the focus of the study presented here. The study is conducted using the Parton Branching Method, which describes Transverse Momentum Dependent (TMD) Parton Densitity Functions (PDF) and provides a very precise description of DY pair transverse momentum distributions across a wide range of collision energies and pair invariant masses. In contrast to the energy dependence of intrinsic kT observed in shower-based Monte Carlo event generators, the CASCADE3 event generator - based on the Parton Branching Method - has provided an intrinsic-kT distribution that is independent of the center of mass energy. Further studies conducted within the Parton Branching Method have sought to understand the origin of this energy dependence, indicating that the dependence is mainly a consequence of the interplay between two main processes: internal transverse motion and soft gluon emission. The latter has been reduced in shower-based event generators, primarily due to the non-perturbative Sudakov form factor, which is often neglected. Since the Sudakov form factor depends on the evolution scale, this paper explores this dependence through the interplay of the two processes and attempts to explain it. Additionally, since QED final state radiation affects the profile of the DY pair transverse momentum distribution, we investigate its impact in both the high and low DY pair invariant mass regions.

    hep-phPhys.Scripta(2025)·6 citations
17. 17*

    Lepton flavor physics: some theoretical aspects

    Zhi-zhong Xing🇨🇳

    A brief and personal overview of some theoretical aspects of lepton flavor physics is presented, with a focus on the canonical seesaw mechanism and Majorana nature of massive neutrinos.

    hep-phPoS(2025)·0 citations
18. 18*

    On the Square Speed of Sound in High-Energy Collisions: Range of Values and How to Understand It

    Ting-Ting Duan🇨🇳 · Fu-Hu Liu🇨🇳 · Khusniddin K. Olimov🇺🇿

    After reviewing the sound speeds in various forms and conditions of matter, we investigate the sound speed of hadronic matter that has decoupled from the hot and dense system formed during high-energy collisions. We comprehensively consider factors such as energy loss of the incident beam, rapidity shift of leading nucleons, and the Landau hydrodynamic model for hadron production. The sound speed is related to the width or standard deviation of the Gaussian rapidity distribution of hadrons. The extracted square speed of sound lies within a range from 0 to 1/3 in most cases. For scenarios exceeding this limit, we also provide an explanation.

    hep-phhep-exAdv.High Energy Phys.(2025)·1 citation
19. 19*

    Asymmetric dark matter from semi-annihilation: unitarity constraints and long-lived final states

    Tomáš Blažek🇸🇰 · Peter Maták🇸🇰 · Viktor Zaujec🇸🇰

    This work presents an asymmetric dark matter model with relic density determined by the freeze-out of asymmetric semi-annihilations into long-lived particles slowly decaying into the Standard Model states. We carefully consider the $CPT$ symmetry and unitarity constraints to the asymmetries entering the Boltzmann equation. The main idea of the paper is to point out a critical inconsistency in the previous literature, where these constraints are violated. We present a systematic approach to avoid the inconsistency.

    hep-phJHEP(2025)·2 citations
20. 20*

    Resonant states of muonic three-particle systems with lithium, helium and hydrogen nuclei

    A. V. Eskin🇷🇺 · V. I. Korobov🇷🇺 · A. P. Martynenko🇷🇺 · F. A. Martynenko🇷🇺

    We study the energy spectrum of three-particle systems (He-p-\mu), (He-d-\mu), (Li-p-\mu) and (Li-d-\mu) on the basis of variational approach with exponential and Gaussian basis. Using the Complex Coordinate Rotation (CCR) method we calculate energies of resonant states of listed molecules.

    hep-phphysics.atom-phPhys.Atom.Nucl.(2025)·1 citation
21. 21*

    Associated production of $J/\psi$ and direct photon in the NRQCD and the ICEM using the high-energy factorization

    Lev Alimov🇷🇺 · Anton Karpishkov🇷🇺 · Vladimir Saleev🇷🇺

    We study the associated $J/\psi$ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark-antiquark pair into a heavy quarkonium, namely the non-relativistic quantum chromodynamics (NRQCD) and the improved color evaporation model (ICEM). We find essential differences in the predictions for cross-section and transverse momenta spectra obtained using the NRQCD and the ICEM, which can be used to discriminate between these models. Our prediction for cross-sections of the associated $J/\psi$ and direct photon production at the LHC energies slightly overestimates the results obtained early in the next-to-leading order (NLO) calculation in the collinear parton model (CPM). We predict different two-particle correlation spectra in the associated $J/\psi$ and direct photon production which may be of interest for experimental study.

    hep-phInt.J.Mod.Phys.A(2025)·4 citations
22. 22*

    Linear Standard Model extensions in the SMEFT at one loop and Tera-Z

    John Gargalionis🇦🇺 · Jérémie Quevillon🇫🇷 · Pham Ngoc Hoa Vuong🇩🇪 · Tevong You🇬🇧

    Linear Standard Model (SM) extensions, defined as new particles that can couple linearly to SM fields, form a motivated and finite set of simplified models for exploring phenomenology Beyond the SM (BSM). Heavy BSM particles may be integrated out to obtain their low-energy effects in the SM Effective Field Theory (SMEFT) parametrised by the Wilson coefficients of higher-dimensional operators. We compute and map the dimension-6 SMEFT operator structure of all scalar and fermion linear SM extensions up to one-loop order, thus extending the existing tree-level dictionary of results. Explicit analytic matching expressions for the Wilson coefficients are provided as both Python and Mathematica code in a GitHub repository accessible through links embedded in our main table for each coefficient and within a Python package. We apply our map to highlight the sensitivity to heavy new physics of a $Z$-pole run at a future Tera-$Z$ factory; at one loop, with unit couplings, all linear SM extensions can be indirectly probed by electroweak precision measurements up to $\mathcal{O}(10)$ TeV.

    hep-phJHEP(2025)·31 citations
23. 23*

    Vector-Like Quarks at the LHC: A Unified Perspective from ATLAS and CMS Exclusion Limits

    Rachid Benbrik (1) · Mohammed Boukidi (1) · Mohamed Ech-chaouy (1) · Stefano Moretti (2) (3) · Khawla Salime (1) · Qi-Shu Yan (4) (5) · ((1) Polydisciplinary Faculty, Laboratory of Fundamental and Applied Physics, Cadi Ayyad University, Morocco, (2) School of Physics and Astronomy, University of Southampton, United Kingdom, (3) Department of Physics and Astronomy, Uppsala University, Sweden, (4) Center for Future High Energy Physics, Chinese Academy of Sciences, P.R. China, (5) School of Physics Sciences, University of Chinese Academy of Sciences, P.R. China)

    In this work, we present a comprehensive review of the most up-to-date exclusion limits on Vector-Like Quarks (VLQs) derived from ATLAS and CMS data at the Large Hadron Collider (LHC). Our analysis encompasses both pair and single production modes, systematically comparing results from the two collaborations to identify and employ the most stringent bounds at each mass point. We evaluate the excluded parameter space for VLQs under singlet, doublet, and triplet representations. For top-like VLQs ($T$), the exclusion limits rule out masses up to 1.49 TeV in singlet scenarios, while single production constrains the mixing parameter $\kappa$ to values below 0.26 at $m_T\sim 1.5$ TeV and up to 0.42 for $m_T\sim 2$ TeV. For bottom-like VLQs ($B$), the strongest exclusion limits from pair production exclude masses up to 1.52 TeV in doublet configurations, with single production constraining $\kappa$ values between 0.2 and 0.7 depending on the mass. For exotic VLQs, such as $X$ and $Y$, pair production excludes masses up to 1.46 TeV and 1.7 TeV, respectively. The constraints on $\kappa$ from these analyses become increasingly restrictive at higher masses, reflecting the enhanced sensitivity of single production channels in this regime. For $X$, $\kappa$ is constrained below 0.16 for masses between 0.8 and 1.6 TeV and further tightens to $\kappa <0.2$ as the mass approaches 1.8 TeV. Similarly, for $Y$, $\kappa$ values are constrained below 0.26 around $m_Y\sim 1.7$ TeV, with exclusions gradually relaxing at higher masses. These exclusion regions, derived from the most stringent LHC search results, offer a unified and up-to-date perspective on VLQ phenomenology. The results were computed using \texttt{VLQBounds}, a new Python-based tool specifically developed for this purpose.

    hep-phJHEP(2025)·31 citations
24. 24*

    Quantifying Imaginarity in Neutrino Systems

    Ashutosh Kumar Alok🇮🇳 · Trambak Jyoti Chall🇮🇳 · Neetu Raj Singh Chundawat🇮🇳 · Yu-Feng Li🇨🇳

    It is a fundamental question why quantum mechanics employs complex numbers rather than solely real numbers. In this work, we conduct the first analysis of imaginarity quantification in neutrino flavor and spin-flavor oscillations. As quantum systems in coherent superposition, neutrinos are ideal candidates for quantifying imaginarity within the resource theoretic framework, using measures such as the ${\ell }_1$-norm and the relative entropy of imaginarity. We show that in the case of two-flavor mixing, these measures of imaginarity are nonzero. The measures of imaginarity reach their extreme values when the probabilistic features of quantum theory are fully maximized, i.e., both the transitional and survival probabilities are approximately equal. Our study reveals that the imaginarity, as a resource, can be harnessed not solely from the presence of a complex phase in the mixing matrix but also from the intrinsic quantum dynamics of time evolution itself. We further extend our analysis to explore the dynamics of three-flavor neutrino mixing, incorporating the effects of a nonzero $CP$ phase.

    hep-phquant-phJ.Phys.G(2026)·3 citations
25. 25*

    Long-lived vectors from electromagnetic cascades at SHiP

    Tao Zhou🇺🇸 · Ryan Plestid🇺🇸 · Kevin J. Kelly🇺🇸 · Nikita Blinov🇨🇦 · Patrick J. Fox🇺🇸

    We simulate dark-vector, $V$, production from electromagnetic cascades at the recently approved SHiP experiment. The cascades (initiated by photons from ${\pi }^0\to \gamma \gamma$) can lead to 3-4 orders of magnitude increase of the event rate relative to using primary production alone. We provide new SHiP sensitivity projections for dark photons and electrophilic gauge bosons, which are significantly improved compared to previous literature. The main gain in sensitivity occurs for long-lived dark vectors with masses below $\sim 50-300\mathrm{MeV}$. The dominant production mode in this parameter space is low-energy annihilation $e^{+}{e}^{-}\to V(\gamma )$. This motivates a detailed study of backgrounds and efficiencies in the SHiP experiment for sub-GeV signals.

    hep-phhep-exJHEP(2025)·16 citations
26. 26*

    Prospects for quantum process tomography at high energies

    Clelia Altomonte🇬🇧 · Alan J. Barr🇬🇧 · Michał Eckstein🇵🇱 · Paweł Horodecki🇵🇱 · Kazuki Sakurai🇵🇱

    In quantum information theory, the evolution of an open quantum system -- a unitary evolution followed by a measurement -- is described by a quantum channel or, more generally, a quantum instrument. In this work, we formulate spin and flavour measurements in collider experiments as quantum instruments. We demonstrate that the Choi matrix, which completely determines input-output transitions, can be both theoretically computed from a given model and experimentally reconstructed from a set of final state measurements (quantum state tomography) using varied input states. The experimental reconstruction of the Choi matrix, known as quantum process tomography, offers a powerful new approach for probing potential extensions of the Standard Model within the quantum field theory framework and, at the same time, constitutes a new foundational test of quantum mechanics itself. As an example, we outline the quantum process tomography approach applied to the $e^{+}{e}^{-}\to t\bar{t}$ process at a polarized lepton collider.

    hep-phhep-exhep-thquant-phQuantum Sci.Technol.(2025)·36 citations
27. 27*

    More on scattering processes of dressed particles with a time-dependent mass

    Yusuke Yamada🇯🇵

    We discuss the scattering process of a scalar field having a time-dependent mass with another scalar field having a constant mass as a toy model of the scattering problems during preheating after inflation. Despite a general difficulty of analytically solving such models, in our previous work [1], we considered an exactly calculable model of such scattering processes with a time-dependent mass of the form $m^2(t)\supset {\mu }^4{t}^2$ and the time-dependence never disappears formally. In this work, we discuss another exactly calculable model with a time-dependent mass that has a spike/peak but asymptotes to a constant, which effectively appears in the preheating model of Higgs inflation with a non-minimal coupling. Thanks to the localized time-dependence of the mass, the daughter particle number density behaves in a physically reasonable way contrary to the one in our previous model due to the infinite time-dependent mass in the asymptotic future. On the other hand, we find that the daughter particle experiences the kinematically forbidden process, which is a non-perturbative phenomenon found in our previous work. As in the previous model, the kinematically forbidden process produces daughter particles exponentially more than the parent particle having the time-dependent mass, which never happens for particle decay processes without time-dependent backgrounds. This result supports the existence of such a non-perturbative particle production process in general time-dependent backgrounds.

    ↳ hep-thhep-phPRD(2025)·0 citations
28. 28*

    Methodology for constraining ultralight vector bosons with gravitational wave searches targeting merger remnant black holes

    Dana Jones🇦🇺 · Nils Siemonsen🇺🇸 · Ling Sun🇦🇺 · William E. East🇨🇦 · Andrew L. Miller🇳🇱 · Karl Wette🇦🇺 · Ornella J. Piccinni🇦🇺

    Ultralight bosons are a hypothetical class of particles predicted under various extensions of Standard Model physics. As a result of the superradiance mechanism, we expect ultralight bosons, should they exist in certain mass ranges, to form macroscopic clouds around rotating black holes, so that we can probe their existence by looking for the long-transient gravitational wave emission produced by such clouds. In this paper, we propose a statistically robust framework for constraining the existence of ultralight vector bosons in the absence of detecting such a signal from searches targeting merger remnant black holes, effectively marginalizing over the uncertainties present in the properties of the target black holes. We also determine the impact of weak kinetic mixing with the ordinary photon and vector mass generation through a hidden Higgs mechanism on the constraining power of these searches. We find that individual follow-up searches, particularly with the next-generation gravitational wave detectors, can probe regions of parameter space for such models where robust constraints are still lacking.

    ↳ gr-qchep-phPRD(2025)·10 citations
29. 29*

    Impact of Sub-MeV Dark Matter on the Cooling of Pulsating White Dwarfs

    Bo Zhang🇨🇳 · Cui-Bai Luo🇨🇳 · Lei Feng🇨🇳

    In our galaxy, white dwarfs inevitably undergo scattering and capture processes with the interstellar diffuse dark matter. The captured dark matter forms a dark halo that eventually evaporates or annihilates. Theoretical pulsation modes and observations of pulsating white dwarfs provide predictions about their evolution. This motivates us to study the impact of sub-MeV interstellar dark matter on the cooling processes of white dwarfs. In this work, we consider the collisions between dark matter and relativistic degenerate electrons inside white dwarfs, numerically calculating the energy input and output results from scattering, capture, evaporation, and annihilation processes. Based on observational data from G117-B15, we conclude that the maximum cooling luminosity of the interstellar sub-MeV dark matter is approximately $10^{22}\text{erg}/\text{s}$, which is insufficient to provide an effective cooling mechanism for white dwarfs. Finally, if future observations detect a pulsating white dwarf in the Galactic center, the potential sensitivity of this scenario could extend to the region$10^{-3}\text{MeV}<m_{\chi }<10\text{MeV}$ and $6.02\times 10^{-38}{\text{cm}}^2>{\sigma }_0\ge 1.5\times 10^{40}{\text{cm}}^2$.

    ↳ astro-ph.HEhep-phPRD(2025)·1 citation
30. 30*

    Spectra of magnetic fields from electroweak symmetry breaking

    Tanmay Vachaspati🇺🇸 · Axel Brandenburg🇸🇪

    We characterize magnetic fields produced during electroweak symmetry breaking by non-dynamical numerical simulations based on the Kibble mechanism. The generated magnetic fields were thought to have an energy spectrum $\propto k^3$ for small wavenumbers $k$, but here we show that it is actually a spectrum $\propto k^4$ along with characteristic fluctuations in the magnetic helicity. Using scaling results from MHD simulations for the evolution and assuming that the initial magnetic field is coherent on the electroweak Hubble scale, we estimate the magnetic field strength to be $\sim 10^{-13}\text{rmG}$ on kpc scales at the present epoch for non-helical fields. For maximally helical fields we obtain $\sim 10^{-10}\text{rmG}$ on Mpc scales. We also give scalings of these estimates for partially helical fields.

    ↳ astro-ph.COhep-phPRD(2025)·6 citations
31. 31*

    Quantum simulation of the phase transition of the massive Thirring model

    Jia-Qi Gong🇨🇳 · Ji-Chong Yang🇨🇳

    Recent advancements in quantum computing technology have enabled the study of fermionic systems at finite temperature via quantum simulations. This presents a novel approach to investigating the chiral phase transition in such systems. Among these, the quantum minimally entangled typical thermal states~(QMETTS) algorithm has recently attracted considerable interest. The massive Thirring model, which exhibits a variety of phenomena at low temperatures, includes both a chiral phase transition and a topologically non-trivial ground state. It therefore raises the intriguing question of whether its phase transition can be studied using a quantum simulation approach. In this study, the chiral phase transition of the massive Thirring model and its dual topological phase transition are studied using the QMETTS algorithm. Numerical results are obtained on a classical computer simulating circuit-based quantum computations. The results show that QMETTS is able to accurately reproduce the phase transition and thermodynamic properties of the massive Thirring model.

    ↳ quant-phcond-mat.str-elhep-phnucl-thJHEP(2025)·4 citations
32. 32*

    Toward extracting scattering phase shift from integrated correlation functions III: coupled-channels

    Peng Guo🇺🇸 · Frank X. Lee🇺🇸

    The formalism developed in Refs.\cite{Guo:2023ecc,Guo:2024zal} that connects integrated correlation function of a trapped two-particle system to infinite volume scattering phase shift is further extended to coupled-channel systems in the present work. Using a trapped non-relativistic two-channel system as an example, a new relation is derived that retains the same structure as in the single channel, and has explicit dependence on the phase shifts in both channels but not on the inelasticity. The relation is illustrated by an exactly solvable coupled-channel quantum mechanical model with contact interactions. It is further validated by path integral Monte Carlo simulation of a quasi-one-dimensional model that can admit general interaction potentials. In all cases, we found rapid convergence to the infinite volume limit as the trap size is increased, even at short times, making it potentially a good candidate to overcome signal-to-noise issues in Monte Carlo applications.

    ↳ hep-lathep-phnucl-thPRD(2025)·8 citations
33. 33*

    Meson spectroscopy in the $Sp(4)$ gauge theory with three antisymmetric fermions

    Ed Bennett🇬🇧 · Deog Ki Hong🇰🇷 · Ho Hsiao🇹🇼 · Jong-Wan Lee🇰🇷 · C.-J. David Lin🇹🇼 · Biagio Lucini🇬🇧 · Maurizio Piai🇬🇧 · Davide Vadacchino🇬🇧

    We report the results of an extensive numerical study of the $Sp(4)$ lattice gauge theory with three (Dirac) flavors of fermion in the two-index antisymmetric representation. In the presence of (degenerate) fermion masses, the theory has an enhanced global $SU(6)$ symmetry, broken explicitly and spontaneously to its $SO(6)$ subgroup. This symmetry breaking pattern makes the theory interesting for applications in the context of composite Higgs models, as well as for the implementation of top partial compositeness. It can also provide a dynamical realisation of the strongly interacting massive particle paradigm for the origin of dark matter. We adopt the standard plaquette gauge action with the Wilson-Dirac formulation for the fermions and apply the (rational) hybrid Monte Carlo algorithm in our ensemble generation process. We monitor the autocorrelation and topology of the ensembles. We explore the bare parameter space, and identify the weak and strong coupling regimes separated by a line of first-order bulk phase transitions. We measure two-point correlation functions between meson operators that transform as non-trivial representations of $SO(6)$, and extract the ground-state masses and the decay constants, in all accessible spin and parity channels. In addition, we measure the mass of the first excited state for the vector meson by solving a generalised eigenvalue problem. Spectral quantities show a mass dependence that is compatible with the expectation that, at long distances, the theory undergoes confinement, accompanied by the spontaneous breaking of the approximate global symmetries acting on the matter fields. Finally, we discuss the continuum and massless extrapolations, after setting the physical scale using the gradient flow method, and compare the results to those of existing studies in the quenched approximation, as well as to the literature on closely related theories.

    ↳ hep-lathep-phhep-thPRD(2025)·16 citations
34. 34*

    Estimating the gravitational wave background anisotropy: a Bayesian approach boosted by cross-correlation angular power spectrum

    Chi Tian🇨🇳 · Ran Ding🇨🇳 · Xiao-Xiao Kou🇺🇸

    We introduce a new method designed for Bayesian inference of the angular power spectrum of the Gravitational Wave Background (GWB) anisotropy. This scheme works with time-series data and can optionally incorporate the cross-correlations between the GWB anisotropy and other cosmological tracers, enhancing the significance of Bayesian inference. We employ the realistic LISA response and noise model to demonstrate the validity of this approach. The findings indicate that, without considering any cross-correlations, the 4-year LISA data is insufficient to achieve a significant detection of multipoles. However, if the anisotropies in the GWB are strongly correlated with the Cosmic Microwave Background (CMB), the 4-year data can provide unbiased estimates of the quadrupole moment ($\ell =2$). This reconstruction process is generic and not restricted to any specific detector, offering a new framework for extracting anisotropies in the GWB data from various current and future gravitational wave observatories.

    ↳ astro-ph.COgr-qchep-phJCAP(2025)·3 citations
35. 35*

    Interpreting the Extremely Diffuse Stellar Distribution of the Nube Galaxy through Fuzzy Dark Matter

    Yu-Ming Yang🇨🇳 · Zhao-Chen Zhang🇨🇳 · Xiao-Jun Bi🇨🇳 · Peng-Fei Yin🇨🇳

    Recent observations have uncovered a remarkably flat and extremely diffuse stellar distribution within the almost dark dwarf galaxy Nube, posing a challenge to the standard cold dark matter scenario. In this study, we employ numerical simulations to explore the possibility that this anomalous stellar distribution can be attributed to the dynamical heating effect of fuzzy dark matter (FDM). The relatively isolated location and low baryon fraction of Nube make it an ideal system for investigating this effect. Our findings indicate that by adopting a halo profile consistent with the dynamical mass estimation of Nube and an FDM particle mass on the order of $10^{-23}$ eV, the final 2D stellar distribution derived from simulation closely matches observational data. These results suggest that FDM could provide an explanation for the extremely diffuse stellar distribution of Nube.

    ↳ astro-ph.GAhep-phApJL(2025)·7 citations
36. 36*

    Simultaneous explanation of XTE J1814-338 and HESS J1731-347 objects using $K^{-}$ and ${\bar{K}}^0$ condensates

    M. Veselsky🇨🇿 · V. Petousis🇨🇿 · P.S. Koliogiannis🇭🇷 · Ch.C. Moustakidis🇬🇷 · J. Leja🇸🇰

    The recent observation of the compact star XTE J1814-338 with a mass of $M=1.2_{-0.05}^{+0.05}{\mathrm{M}}_{\odot }$ and a radius of $R=7_{-0.4}^{+0.4}$ km, together with the HESS J1731-347, which has a mass of $M=0.77_{-0.17}^{+0.20}{\mathrm{M}}_{\odot }$ and a radius of $R=10.4_{-0.78}^{+0.86}$ km, shows they provide evidence for the possible presence of exotic matter in the core of neutron stars and significantly enhance our understanding of the equation of state for the dense nuclear matter. In the present study, we investigate the possible existence of negative charged kaons and neutral anti-kaons in neutron stars by employing the relativistic mean field model with first order kaonic ($K^{-}$ and ${\bar{K}}^0$) condensates. To the best of our knowledge, this represents a first alternative attempt aimed to explain the bulk properties of the XTE J1814-338 object and at the same time the HESS J1731-347 object, using a mixture of kaons condensation in dense nuclear matter. In addition, we compare our analysis approach with the recent observation of PSR J0437-4715 and PSR J1231-1411 pulsars, proposing that to simultaneously explain the current variety of astrophysical objects, it is essential to resurrect a scenario of two distinct branches, each corresponding to a different composition of nuclear matter.

    ↳ nucl-thastro-ph.HEastro-ph.SRhep-phPRD(2025)·11 citations
37. 37*

    Nucleon charges and $\sigma$-terms in lattice QCD

    C. Alexandrou (Univ. of Cyprus & The Cyprus Inst.)🇨🇾 · S. Bacchio (The Cyprus Inst.)🇨🇾 · J. Finkenrath (CERN)🇨🇭 · C. Iona (Univ. of Cyprus)🇨🇾 · G. Koutsou (The Cyprus Inst.)🇨🇾 · Y. Li (Univ. of Cyprus)🇨🇾 · G. Spanoudes (Univ. of Cyprus)🇨🇾

    We determine the nucleon axial, scalar and tensor charges and the nucleon $\sigma$-terms using twisted mass fermions. We employ three ensembles with approximately equal physical volume of about 5.5~fm, three values of the lattice spacing, approximately 0.06~fm, 0.07~fm and 0.08~fm, and with the mass of the degenerate up and down, strange and charm quarks tuned to approximately their physical values. We compute both isovector and isoscalar charges and $\sigma$-terms and their flavor decomposition including the disconnected contributions. We use the Akaike Information Criterion to evaluate systematic errors due to excited states and the continuum extrapolation. For the nucleon isovector axial charge we find $g_A^{u-d}=1.250(24)$, in agreement with the experimental value. Moreover, we extract the nucleon $\sigma$-terms and find for the light quark content ${\sigma }_{\pi N}=41.9(8.1)$~MeV and for the strange ${\sigma }_s=30(17)$~MeV.

    ↳ hep-lathep-exhep-phnucl-thPRD(2025)·40 citations
38. 38*

    Outliers in DESI BAO: robustness and cosmological implications

    Domenico Sapone🇨🇱 · Savvas Nesseris🇪🇸

    We apply an Internal Robustness (iR) analysis to the recently released Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillations dataset. This approach examines combinations of data subsets through a fully Bayesian model comparison, aiming to identify potential outliers, subsets possibly influenced by systematic errors, or hints of new physics. Using this approach, we identify three data points at $z=0.295,0.51,0.71$ as potential outliers. Excluding these points improves the internal robustness of the dataset by minimizing statistical anomalies and enables the recovery of $\Lambda$CDM predictions with a best-fit value of $w_0=-1.050\pm 0.128$ and $w_a=0.208\pm 0.546$. These results raise the intriguing question of whether the identified outliers signal the presence of systematics or point towards new physics.

    ↳ astro-ph.COgr-qchep-phPRD(2025)·29 citations
39. 39*

    High-energy interactions of charged black holes in full general relativity II: Near-extremal merger remnants and universality with the irreducible mass

    M A. M. Smith🇺🇸 · Vasileios Paschalidis🇺🇸 · Gabriele Bozzola🇺🇸

    In a previous paper, arXiv:2411.11960 [gr-qc], we initiated a study of high-energy interactions of charged binary black holes near the scattering threshold, focusing on zoom-whirl orbits. In this second paper in our series, we focus on merger remnant properties and energetics with new simulations of equal-mass, equal-charge, nonspinning binary black holes with variable impact parameter. We find near-extremal merger remnants with Kerr-Newman parameter reaching ${{\rm Y}}_f=0.97$, and observe that the maximum ${{\rm Y}}_f$ increases monotonically with $\lambda$ for a fixed initial Lorentz factor. We find that binaries with larger $\lambda$ radiate less total energy despite having stronger electromagnetic emission. The maximum energy radiated by a binary in our study is $31\%$ of its gravitational mass. Increasing $\lambda$ has little effect on the maximum angular momentum radiated, which was $\approx 72\%$ of the spacetime total angular momentum for each $\lambda$ explored here. Lastly, we provide additional evidence for the universality with the irreducible mass that we discovered in arXiv:2411.11960 [gr-qc]. The black hole horizon areal radius determines a fundamental, gauge-invariant length scale governing BH interactions near the scattering threshold.

    ↳ gr-qchep-phhep-thPRD(2025)·4 citations
40. 40*

    Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe

    Ian Holst🇺🇸 · Gordan Krnjaic🇺🇸 · Huangyu Xiao🇺🇸

    If primordial black holes (PBH) are present in the early universe, their contribution to the energy budget grows relative to that of radiation and generically becomes dominant unless the initial abundance is exponentially small. This black hole domination scenario is largely unconstrained for PBHs with masses $\lesssim 10^9\mathrm{g}$, which evaporate prior to Big Bang nucleosynthesis. However, if the era of PBH domination is sufficiently long, the PBHs form clusters and can merge appreciably within these objects. We calculate the population statistics of these clusters within the Press-Schechter formalism and find that, for a wide range of PBH masses and Hubble rates at the onset of PBH domination, the mergers within PBH clusters can exhibit runaway behavior, where the majority of the cluster will eventually form a single black hole with a mass much greater than the original PBH mass. These mergers can dramatically alter the PBH mass distribution and leave behind merged relic black holes that evaporate after Big Bang nucleosynthesis and yield various observational signatures, excluding parameter choices previously thought to be viable

    ↳ astro-ph.COhep-phPRD(2025)·15 citations
41. 41*

    A note on loop resummation in de Sitter spacetime with the wavefunction of the universe approach

    Javier Huenupi🇨🇱 · Ellie Hughes🇺🇸 · Gonzalo A. Palma🇨🇱 · Spyros Sypsas🇹🇭

    We analyze the computation of $n$-point correlation functions in de Sitter spacetime, including loop corrections, using the wavefunction of the universe approach. This method consists of two stages employing distinct Feynman rules. First, one must compute the wavefunction coefficients using interactions as vertices. Then, in the second stage, one computes correlation functions using wavefunction coefficients as vertices. For massless fields, loop corrections in the first stage are free of infrared (IR) divergences, which leads to the question of how this matches the well-known IR behavior of correlators obtained via other methods. By considering a scalar field with an arbitrary potential, we compute $n$-point correlation functions to first order in the potential but to all orders in loops. We find that, although loop integrals in the first stage are indeed IR convergent, the second procedure reintroduces the IR divergence. We discuss how this induces renormalization of the interaction potential such that the final result combining both steps exactly matches the form of $n$-point functions previously calculated with other methods.

    ↳ hep-thastro-ph.COhep-phPRD(2025)·8 citations
42. 42*

    Estimating energy levels from lattice QCD correlation functions using a transfer matrix formalism

    Debsubhra Chakraborty🇮🇳 · Dhruv Sood🇮🇳 · Archana Radhakrishnan🇮🇳 · Nilmani Mathur🇮🇳

    We present an efficient method for extracting energy levels from lattice QCD correlation functions by computing the eigenvalues of the transfer matrix associated with the lattice QCD Hamiltonian. While mathematically and numerically equivalent to the recently introduced Lanczos procedure, our approach introduces a novel prescription for removing spurious eigenvalues using a kernel density estimator (KDE) and Gaussian-convoluted histogram method. This strategy yields a robust and stable estimate of the energy spectrum, outperforming the Cullum-Willoughby filtering technique in efficiency. In addition, we detail how this method can be applied to extract overlap factors from two-point correlation functions, as well as matrix elements from three-point functions with a current insertion. Furthermore, we extend the methodology to accommodate correlation matrices constructed from a variational basis of operators, with its Block formulation. We demonstrate the efficacy of this framework by computing the two lowest energy levels for a broad range of hadrons, including several nuclei. Although the signal-to-noise ratio is not significantly improved, the extracted energy levels are found to be more reliable than those obtained with conventional techniques. Within a given statistical ensemble, the proposed method effectively captures both statistical uncertainties and systematic errors, including those arising from the choice of fitting window, making it a robust and practical tool for lattice QCD analysis.

    ↳ hep-lathep-phhep-thnucl-thPRD(2025)·20 citations
43. 43*

    Funções elíticas

    Kelly Roberta Mazzutti Lübeck · Valério Ramos Batista

    In 1989 H.Karcher rewrote the theory of elliptic functions through an approach that is much more geometrical than analytical. Therewith he obtained an optimal control over the behaviour and image values of these functions, which allowed for their broad application in minimal surfaces. Our work is devoted to presenting the theory of elliptic functions according to Karcher's approach, as well as some of its applications in minimal surfaces. The original publication was a mini-course that can be downloaded at https://www.dm.ufscar.br/profs/lobos/IIEPG

    ↳ math.DGhep-ph0 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.