Mon·Oct 28, 2024Monday·October 28, 2024

1. 01*

   Neutrino force at all length scales

   Mitrajyoti Ghosh🇺🇸 · Yuval Grossman🇺🇸 · Chinhsan Sieng🇺🇸 · Bingrong Yu🇺🇸

   The Standard Model predicts a long-range force mediated by a pair of neutrinos, known as ``the neutrino force". It scales as $G_F^2/r^5$, where $G_F$ is the Fermi constant. However, as $r\lesssim \sqrt{G_F}$, the four-Fermi theory breaks down and the neutrino force no longer has the $1/r^5$ scaling. For the first time, we derive a complete expression for the neutrino force that is valid at all distances. For $r\gg \sqrt{G_F}$, the result reduces to the known $G_F^2/r^5$; for $r\ll \sqrt{G_F}$, it scales as $1/r$. We explore the implications of this result for atomic parity violation (APV) experiments. A key feature of the neutrino force is that it is a long-range effect compared to the atomic length scale. Thus, in general, it cannot be simply treated as a correction to the tree-level $Z$-exchange diagram without considering the atomic wavefunctions. We calculate the effects in muonium and positronium, finding that the neutrino force contributes about 4\% and 16\%, respectively, compared to the leading $Z$ exchange. This indicates a significant impact on APV, with important implications for detecting the neutrino force and measuring the weak mixing angle in APV experiments.

   hep-phphysics.atom-phPRD(2025)·11 citations
2. 02*

   Absorption of a twisted photon by an electron in strong magnetic field

   A.A. Shchepkin🇷🇺 · D.V. Grosman🇷🇺 · I.I. Shkarupa🇷🇺 · D.V. Karlovets (School of Physics and Engineering, ITMO University, 197101, St. Petersburg, Russia)🇷🇺

   The work investigates absorption of a twisted photon, which possesses quantized total angular momentum (TAM), by a relativistic electron with the Lorentz factor $\gamma \sim 1-10$ in a strong magnetic field up to the Schwinger limit, $H_c=4.4\cdot 10^{13}$ G. We examine the absorption cross sections and their dependence on the parameters of the incident photon and the initial Landau electron. It is found that total absorption cross sections decrease as angular momentum of the incident photon increases and increase as angular momentum of the initial electron grows. The process is also compared across different magnetic field strengths, and the contribution of various electron spin transitions to total absorption cross section is analyzed. We also find that the processes without an electron spin flip dominate and, on top of that, an asymmetry in the ``spin-down'' $\to$ ``spin-up'' and the ``spin-up'' $\to$ ``spin-down'' transitions is observed. Specifically, the cross sections for the ``spin-down'' $\to$ ``spin-up'' transition are larger, which can be interpreted as an analogy of the Sokolov-Ternov effect present for photon emission. Finally, the cross sections are found to be almost constant as the transverse momentum of the photon varies from $0.1$ eV to $100$ keV. Our findings can help to improve the understanding of the QED processes in critical fields, typical for astrophysical environments, e.g. magnetospheres of neutron stars.

   hep-phastro-ph.HEhep-thquant-phEPJC(2025)·1 citation
3. 03*

   Cancellation of Infrared Divergences in $e^{+}{e}^{-}\to q\bar{q}g$ in Light Front Coherent State Formalism

   Deepesh Bhamre🇧🇷 · Shrey Gogia🇮🇳 · Anuradha Misra🇮🇳

   We address the issue of cancellation of infrared (IR) divergences at the amplitude level in Light Front Quantum Chromodynamics (LFQCD) using the coherent state formalism. We consider the process $e^{+}{e}^{-}\to q\bar{q}g$ upto $\mathcal{O}(g^3)$ in light-cone-time-ordered Hamiltonian perturbation theory and show that IR divergences in S-matrix elements appear due to vanishing energy denominators. We construct the coherent state formalism for LFQCD and explicitly show that these divergences are cancelled when a coherent state basis is used for calculating the S-matrix elements.

   hep-phhep-thPRD(2025)·1 citation
4. 04*

   Sensitivity analysis for the anomalous $tq\gamma$ couplings via $\gamma q\to t\gamma$ subprocess in photon-proton collisions at the FCC-$\mu$p

   E. Alici🇹🇷

   In this study, we investigate anomalous flavour-changing neutral current (FCNC) interactions related to the top quark, particularly the $t\to q\gamma$ transition, within the Standard Model Effective Field Theory (SMEFT) framework. These rare processes are largely suppressed in the Standard Model (SM) and are strong indicators for new physics scenarios beyond the SM. In our study, we have analyzed the cross sections of the $\gamma q\to t\gamma$ subprocess for two different center-of-mass energies, 17.3 TeV and 24.5 TeV, at the Future Circular Collider (FCC-$\mu$p) collider. Our results derived from simulations show that the branching ratios for these processes can be reduced to the order of $10^{-5}$. These values provide significantly tighter limits than the current experimental limits. In light of these findings, it can be stated that the FCC-$\mu$p collider offers significant potential for discovering new physics which represents a sensitivity improvement over the current experimental limits from CMS, enhancing sensitivity by approximately 30\%.Moreover, it has been demonstrated that higher centre-of-mass energies and integrated luminosity values significantly enhance the discovery potential of these rare processes. Accordingly, the results indicate that-energy colliders such as FCC-$\mu$p are of critical importance in the search for new physics and in the study of the role of the top quark in the context of flavour physics. As a result, by providing a comprehensive theoretical analysis, this study contributes to the importance of FCNC processes in the search for new physics beyond the Standard Model and will shed light on future experimental and phenomenological studies.

   hep-phResults Phys.(2025)·3 citations
5. 05*

   Minimal SO(10) ante portas: the importance of being effective

   Anca Preda🇸🇪 · Goran Senjanović🇩🇪 · Michael Zantedeschi🇨🇳

   The minimal $SO(10)$ grand unified theory, augmented by higher-dimensional operators, is based on the following Higgs representations: adjoint $45_{\mathrm{H}}$, spinor $16_{\mathrm{H}}$ and complex vector $10_{\mathrm{H}}$. It was recently realized that, as opposed to the conventional wisdom, any intermediate mass scale has to lie close to the grand unification one. This bears profound consequences for the scalar particles mass spectrum and the proton decay lifetime. A complete analysis of the parameter space shows the following interesting correlation under the requirement of perturbativity of the theory: A color octet below approximately $5\mathrm{TeV}$ would imply a lower bound on neutrino mass $m_{\nu }\gtrsim 0.2\mathrm{eV}$, soon to be probed, a scalar weak triplet below $500\mathrm{GeV}$ and a scalar weak doublet, color triplet below $3\mathrm{TeV}$. If one were to stick to no flavor cancellations in proton decay amplitudes, one would recover a recent result of all these states being accessible at collider energies. Moreover, the proton decay lifetime would then be tantalizingly close to the present experimental bound.

   hep-phPRD(2025)·7 citations
6. 06*

   Searches for BSM physics at a gamma-gamma collider with Energy < $12$ GeV based on European XFEL

   Marten Berger🇩🇪 · Gudrid Moortgat-Pick🇩🇪 · Monika Wüst🇩🇪

   The possibility of a Photon-Photon collider extension to the Beam dump of the $17.5$ GeV European XFEL has been discussed before as the first high energy collider of its sort. It would not just be to study the concept of photon colliders but would also be a collider without competition in the region of $5-12$ GeV for photon-photon collision. In this range, $b\overline{b}$ and $c\overline{c}$ resonances, tetraquarks as well as mesonic molecules can be observed. Furthermore, some BSM processes can also be reached in this range. In this paper we want to discuss the possibility of observing ALPs at such a collider. We will use a simplified description of the compton backscattering process to get a first look at cross sections and extend this to the full beam dynamics included prediction.

   hep-phEPJ Web Conf.(2024)·0 citations
7. 07*

   Deciphering the mechanism of $J/\psi$-nucleon scattering

   Bing Wu🇨🇳 · Xiang-Kun Dong🇩🇪 · Meng-Lin Du🇨🇳 · Feng-Kun Guo🇨🇳 · Bing-Song Zou🇨🇳

   The low-energy $J/\psi N$ scattering is important for various reasons: it is related to the hidden-charm $P_c$ pentaquark states, provides insights into the role of gluons in nucleon structures, and is relevant to the $J/\psi$ properties in nuclear medium. The scattering can happen through two distinct mechanisms: the coupled-channel mechanism via open-charm meson-baryon intermediate states, and the soft-gluon exchange mechanism. We investigate the $J/\psi N$ $S$-wave scattering length through both mechanisms, and find that the soft-gluon exchange mechanism leads to a scattering length at least one order of magnitude larger than that from the coupled-channel mechanism and thus is the predominant one. The findings can be verified by lattice calculations and will enhance our understanding of the scattering processes breaking the Okubo-Zweig-Iizuka rule.

   hep-phhep-latnucl-exnucl-thFund.Res.(2025)·20 citations
8. 08*

   Probing long-lived doubly charged scalar in the Georgi-Machacek model at the LHC and in far detectors

   Chih-Ting Lu🇨🇳 · Xinyu Wang🇨🇳 · Xinqi Wei🇨🇳 · Yongcheng Wu🇨🇳

   Searching for long-lived particles (LLPs) beyond the Standard Model (SM) is a promising direction in collider experiments. The Georgi-Machacek (GM) model extends the scalar sector in the SM by introducing various new scalar bosons. In this study, we focus on the parameter space that allows the light doubly charged scalar to become long-lived. This light doubly charged scalar is fermophobic and predominantly decays into a pair of on-shell or off-shell same-sign $W$ bosons. We investigate three types of signal signatures at the LHC: displaced vertices in the inner tracking detector, displaced showers in the muon system, and heavy stable charged particles. Additionally, we analyze the potential for detecting such doubly charged scalars in far detectors, including ANUBIS, MATHUSLA, FACET, FASER, CODEX-b, MoEDAL-MAPP and AL3X. By combining the LLP searches at the LHC and in far detectors, we project that the limits on the mixing angle, ${\theta }_H$, (between the doublet and triplets) can cover most of the parameter space with $\sin {\theta }_H\lesssim 10^{-3}$ for the mass range of long-lived doubly charged scalars between $50$ GeV to $180$ GeV, assuming the full integrated luminosity at the LHC and HL-LHC.

   hep-phJHEP(2025)·13 citations
9. 09*

   $P$-wave charmonium contribution to hidden-charm states from reanalysis of lattice QCD data

   Pan-Pan Shi🇪🇸 · Miguel Albaladejo🇪🇸 · Meng-Lin Du🇨🇳 · Feng-Kun Guo🇨🇳 · Juan Nieves🇪🇸

   We reanalyze, considering the contribution of $P$-wave charmonia, lattice data for the $D\bar{D}$-$D_s{\bar{D}}_s$ coupled-channel of S. Prelovsek et al. [JHEP 06, 035 (2021)] and $D{\bar{D}}^{\ast }$ systems of S. Prelovsek et al. [Phys. Rev. Lett. 111, 192001 (2013)] with $m_{\pi }\simeq 280$ and $266$ MeV, and $L=24a/32a$ ($a\simeq 0.09$ fm) and $L=16a$ ($a\simeq 0.1239(13)$ fm), respectively. The hidden-charm states with $J^{PC}=0^{++}$, $1^{++}$, and $2^{++}$ quantum numbers are then searched for. For $0^{++}$, the analysis reveals three poles in the $D\bar{D}$-$D_s{\bar{D}}_s$ coupled-channel amplitude, corresponding to three states. Two of these poles, located near the $D\bar{D}$ and $D_s{\bar{D}}_s$ thresholds, can be interpreted as mostly molecular states. A third pole above the $D_s{\bar{D}}_s$ threshold is originated from the $P$-wave ${\chi }_{c0}(2P)$ charmonium state. The number of poles found in the $D\bar{D}$-$D_s{\bar{D}}_s$ system is the same as that found in the original lattice analysis though the position of the third pole changes sizeably. In the $1^{++}$ sector, we find two poles in the complex energy plane. The first one is related to the molecular $X(3872)$ state, with a compositeness exceeding $90\%$, while the second one, stemming from the ${\chi }_{c1}(2P)$ charmonium, appears above the $D{\bar{D}}^{\ast }$ threshold and it likely corresponds to the recently discovered ${\chi }_{c1}(4010)$ state. In the $2^{++}$ sector, we also report two poles and find that the dressed ${\chi }_{c2}(2P)$ is lighter than the $D^{\ast }{\bar{D}}^{\ast }$ molecular state, with the dynamics of the latter closely related to that of the heavy-quark spin-symmetry partner of the $X(3872)$. Our exploratory study of the $1^{++}$ and $2^{++}$ sectors offers valuable insights into their dynamics, but given that the fits that we carry out are underconstrained, more lattice data are required to draw robust conclusions.

   hep-phhep-exhep-latnucl-thPRD(2025)·14 citations
10. 10*

    Formation, dissociation and regeneration of charmonia within microscopic Langevin simulations

    Naomi Oei🇩🇪 · Nadja Krenz🇩🇪 · Juan Torres-Rincon🇪🇸 · Hendrik van Hees🇩🇪 · Carsten Greiner🇩🇪

    We present a microscopic dynamical model to study the formation, dissociation, and recombination processes of charmonium states in a heat bath at constant temperature and volume. Within this classical approach, heavy quarks are described as Brownian particles in a background medium of light constituents and can therefore be modeled by a Fokker-Planck equation with constant transport coefficients, which is then implemented through relativistic Langevin simulations. The heavy quarks interact classically via a Coulomb-like screened potential to form a bound state if the relative energy of the pair becomes negative. Dissociation of bound states is possible as a result of screening effects on the potential as well as through scatterings with plasma particles. We demonstrate the full equilibration of the system and show that the resulting equilibrium charmonium yields are in accordance with the Statistical Hadronization Model.

    hep-phnucl-thPRD(2025)·11 citations
11. 11*

    Approaching Stable Quark Matter

    Yang Bai🇺🇸 · Ting-Kuo Chen🇺🇸

    The determination of whether the ground state of baryon matter in Quantum Chromodynamics (QCD) is the ordinary nucleus or a quark matter state remains a long-standing question in physics. A critical parameter in this investigation is the bag parameter $B$, which quantifies the QCD vacuum energy and can be computed using nonperturbative methods such as Lattice QCD (LQCD). By combining the equation of state derived from perturbative QCD (pQCD) with the bag parameter to fit the LQCD-simulated data for isospin-dense matter, we address the stability of quark matter within the LQCD+pQCD framework. Our findings suggest that the current data imposes an upper bound on $B^{1/4}\lesssim 160$ MeV, approaching a conclusive statement on quark matter stability. Given the lower bound on $B$ from the quark condensate contribution to the vacuum energy, the stable 2-flavor quark matter remains possible, whereas the stable 2+1-flavor quark matter is excluded, assuming complete deconfinement and chiral-symmetry restoration and the reliability of pQCD at baryon chemical potentials around the proton mass. Additionally, we derive more general thermodynamic bounds on the quark matter energy-per-baryon and $B$, which, while weaker, provide complementary insights.

    hep-phhep-latnucl-thEPJC(2026)·13 citations
12. 12*

    Flavoring the production of Higgs pairs

    M. A. Arroyo-Ureña🇲🇽 · J. Lorenzo Díaz-Cruz🇲🇽 · E. A. Herrera-Chacón🇬🇧 · T. A. Valencia-Pérez🇲🇽 · J. Mejia Guisao🇻🇪

    We present a study on the possibility of observing a hypothetical particle known as the Flavon $H_F$, which is predicted in an extension of the standard model that includes the so-called Froggatt-Nielsen mechanism. The proposed decay channel is through a $b\bar{b}h$ final state, where the Higgs boson $(h)$ decays to a pair of photons or a pair of $b$ quarks $(h\to \gamma \gamma ,b\bar{b})$. We found that, under special scenarios of the model parameter space, the processes analyzed could provide evidence for the existence of the Flavon in the next stage of the LHC: the High Luminosity LHC. Specifically, we predict a \textit{signal significance} of $5\sigma$ ($2\sigma$) in the $h\to b\bar{b}$ ($h\to \gamma \gamma$) channel for a Flavon mass of $800$ ($900$) GeV and an integrated luminosity of $2500$ ($3000$) fb${}^{-1}$.

    hep-phPRD(2025)·0 citations
13. 13*

    The Influence of Lepton Portal on the WIMP-pFIMP framework

    Jayita Lahiri🇩🇪 · Dipankar Pradhan🇮🇳 · Abhik Sarkar🇮🇳

    The dynamics and detection possibility of a pseudo-FIMP (pFIMP) dark matter (DM) in the presence of a thermal DM have been studied in different contexts. The pFIMP phenomenology largely depends on the WIMP-like partner DM, as pFIMP interacts with the standard model (SM) particles only via the partner DM loop. Introducing a lepton portal interaction, which connects DM directly to the SM lepton sector, improves its detection prospects. However, such possibilities are constrained strongly by the non-observation of lepton flavor-violating decays. Interestingly, this also makes it possible to probe such models in future low-energy experiments. In this article, we have tried to establish such connections and find parameter space which respects the limits from DM relic, direct, indirect, and lepton flavor violation (LFV). We also recast the constraints from di-lepton/di-tau plus missing energy signal at the LHC on our model and provide projections for HL-LHC and future lepton colliders. Although the LFV and collider limits mainly concern WIMPs, the parameter space for pFIMPs is also constrained due to its strong connection to WIMPs through DM relic density and detection prospects.

    hep-phJHEP(2025)·6 citations
14. 14*

    A Universal Bound on QCD Axions from Supernovae

    Konstantin Springmann🇮🇱 · Michael Stadlbauer🇩🇪 · Stefan Stelzl🇨🇭 · Andreas Weiler🇩🇪

    We identify a new production channel for QCD axions in supernova environments that contributes to axion emissivity for all models solving the strong CP problem. This channel arises at tree-level from a shift-symmetry-breaking operator constructed at next-to-leading order in Chiral Perturbation Theory. In scenarios where model-dependent derivative couplings to nucleons are absent, this sets the strongest model-independent constraint on the axion mass, improving on existing bounds by two orders of magnitude.

    hep-phastro-ph.HEnucl-thPRD(2025)·42 citations
15. 15*

    Chern-Simons Induced Thermal Friction on Axion Domain Walls

    Saquib Hassan🇬🇧 · Gaurang Ramakant Kane🇬🇧 · John March-Russell🇬🇧 · Georges Obied🇬🇧

    We study the dynamics and interactions of the solitonic domain walls that occur in realistic axion electrodynamics models including the Chern-Simons interaction, $a{ϵ}_{\mu \nu \lambda \sigma }{F}^{\mu \nu }{F}^{\lambda \sigma }$, between an axion $a(x)$ of mass $m_a$, and a massless U(1) gauge field, e.g. EM, interacting with strength $\alpha =e^2/4\pi$ with charged matter, e.g. electron-positron pairs. In particular, in the presence of a U(1) gauge-and-matter relativistic thermal plasma we study the friction experienced by the walls due to the Chern-Simons term. Utilizing the linear response method we include the collective effects of the plasma, as opposed to purely particle scattering across the wall (as is done in previous treatments) which is valid only in the thin wall regime that is rarely applicable in realistic cases. We show that the friction depends on the Lorentz-$\gamma$-factor-dependent inverse thickness of the wall in the plasma frame, ${\ell }^{-1}\sim \gamma m_a$, compared to the three different plasma scales, the temperature $T$, the Debye mass $m_D\sim \sqrt{\alpha }T$, and the damping rate $\Gamma \sim {\alpha }^{2}T$, and elucidate the underlying physical intuition for this behavior. (For friction in the thin-wall-limit we correct previous expressions in the literature.) We further consider the effects of long-range coherent magnetic fields that are possibly present in the early universe and compare their effect with that of thermal magnetic fields. Finally, we briefly discuss the possible early universe consequences of our results for domain wall motion and network decay, stochastic gravitational wave production from domain wall networks, and possible primordial black hole production from domain wall collapse, though a more complete discussion of these topics is reserved for a companion paper.

    hep-phastro-ph.COhep-thJHEP(2025)·10 citations
16. 16*

    Graded transcendental functions: an application to four-point amplitudes with one off-shell leg

    Thomas Gehrmann🇨🇭 · Johannes Henn🇩🇪 · Petr Jakubčík🇨🇭 · Jungwon Lim🇩🇪 · Cesare Carlo Mella🇩🇪 · Nikolaos Syrrakos🇩🇪 · Lorenzo Tancredi🇩🇪 · William J. Torres Bobadilla🇬🇧

    Several recent works have demonstrated the powerful algebraic simplifications that can be achieved for scattering amplitudes through a systematic grading of transcendental quantities. We develop these concepts to construct a minimal basis of functions tailored to a scattering amplitude in a general way. Starting with formal solutions for all master integral topologies, we organise the appearing functions by properties such as their symbol alphabet or letter adjacency. We rotate the basis such that functions with spurious features appear in the least possible number of basis elements. Since their coefficients must vanish for physical quantities, this approach avoids complex cancellations. As a first application, we evaluate all integral topologies relevant to the three-loop $Hggg$ and $Hgq\bar{q}$ amplitudes in the leading-colour approximation and heavy-top limit. We describe the derivation of canonical differential equation systems and present a method for fixing boundary conditions without the need for a full functional representation. Using multiple numerical reductions, we test the maximal transcendentality conjecture for $Hggg$ and identify a new letter which appears in functions of weight 4 and 5. In addition, we provide the first direct analytic computation of a three-point form factor of the operator $\mathrm{Tr}({\varphi }^2)$ in planar $\mathcal{N}=4$ sYM and find agreement with numerical and bootstrapped results.

    ↳ hep-thhep-phJHEP(2024)·46 citations
17. 17*

    A cosmological case study of a tower of warm dark matter states: $N$naturalness

    Saurabh Bansal🇺🇸 · Subhajit Ghosh🇺🇸 · Matthew Low🇺🇸 · Yuhsin Tsai🇺🇸

    In this work, we study the cosmological effects of a tower of warm dark matter states on the cosmic microwave background (CMB) and on large-scale structure (LSS). For concreteness, we consider the $N$naturalness model, which is a proposed mechanism to solve the Higgs hierarchy problem. In this framework, the sector of particles of the Standard Model is copied $N$ times where the Higgs mass-squared value is the only parameter that changes between sectors. The other sectors are similar to our own, except their particles are proportionally heavier and cooler compared to the Standard Model sector. Since each sector is extremely weakly coupled to other sectors, direct observations of the new particles are not expected. The addition of new photon-like species and new neutrino-like species, however, can be detected through the CMB and in LSS data. These additional neutrinos form a tower of states with increasing mass and decreasing temperature compared to the SM neutrinos. This tower causes a more gradual suppression of the matter power spectrum across different comoving wavenumbers than a single warm dark matter state would. We quantitatively explore these effects in the $N$naturalness model and compute the parameter space allowed by the Planck 2018, weak lensing, and Lyman-$\alpha$ datasets. Depending on the underlying parameters, Planck 2018 and weak lensing data can require $N$naturalness to be tuned at the $10\%$ level for Dirac neutrinos and at the $5\%$ level for Majorana neutrinos. The additional neutrino states are crucial in constraining the model, particularly through their suppression of the power spectrum at small scales. The inclusion of many warm dark matter species is computationally very challenging and we make detailed assessments of our approximations and comment on potential future improvements.

    ↳ astro-ph.COhep-phJCAP(2025)·9 citations
18. 18*

    Comparing effective temperatures in standard, Tsallis, and q-dual statistics from transverse momentum spectra of identified light charged hadrons produced in gold--gold collisions at RHIC energies

    Ting-Ting Duan🇨🇳 · Pei-Pin Yang🇨🇳 · Peng-Cheng Zhang🇨🇳 · Hai-Ling Lao🇨🇳 · Fu-Hu Liu🇨🇳 · Khusniddin K. Olimov🇺🇿

    This study investigates the transverse momentum ($p_T$) spectra of identified light charged hadrons produced in gold--gold (Au+Au) collisions across various centrality classes at center-of-mass energies per nucleon pair, $\sqrt{s_{NN}}$, ranging from 7.7 to 200 GeV, as measured by the STAR Collaboration at the Relativistic Heavy Ion Collider (RHIC). The analysis employs standard (Bose-Einstein/Fermi-Dirac), Tsallis, and q-dual statistics to fit the same $p_T$ spectra and derive distinct effective temperatures: $T_{\text{Standard}}$, $T_{\text{Tsallis}}$, and $T_{\text{q-dual}}$. In most instances, there exists an approximately linear relationship or positive correlation between $T_{\text{Tsallis}}$ and $T_{\text{Standard}}$, as well as between $T_{\text{q-dual}}$ and $T_{\text{Standard}}$, when considering $T_{\text{Standard}}$ as a baseline. However, while both $T_{\text{Tsallis}}$ and $T_{\text{q-dual}}$ increase from semi-central to central Au+Au collisions at 62.4 GeV and 200 GeV, where QGP is expected, changes in $T_{\text{Standard}}$ occur more gradually. This work suggests that $T_{\text{Standard}}$ is better suited for characterizing phase transitions between hadronic matter and QGP compared to $T_{\text{Tsallis}}$ or $T_{\text{q-dual}}$, primarily due to the considerations related to entropy index in the Tsallis and q-dual statistics.

    ↳ nucl-exhep-exhep-phnucl-thEur.Phys.J.Plus(2024)·5 citations
19. 19*

    Locating Critical Points Using Ratios of Lee-Yang Zeros

    Tatsuya Wada🇯🇵 · Masakiyo Kitazawa🇯🇵 · Kazuyuki Kanaya🇯🇵

    We propose a method to numerically determine the location of a critical point in general systems using the finite-size scaling of Lee-Yang zeros. This method makes use of the fact that the ratios of Lee-Yang zeros on various spatial volumes intersect at the critical point. While the method is similar to the Binder-cumulant analysis, it is advantageous in suppressing the finite-volume effects arising from the mixing of variables in general systems. We show that the method works successfully for numerically locating the CP in the three-dimensional three-state Potts model with a nonzero external field.

    ↳ hep-latcond-mat.stat-mechhep-phhep-th+1PRL(2025)·10 citations
20. 20*

    A rigorous solution to the superluminal issue in the diffusion equation

    Xing-Jian Lv🇨🇳 · Xiao-Jun Bi🇨🇳 · Kun Fang🇨🇳 · Peng-Fei Yin🇨🇳 · Meng-Jie Zhao🇨🇳

    Superluminal propagation is an intrinsic problem in the diffusion equation and has not been effectively addressed for a long time. In this work, a rigorous solution to this issue is obtained under the assumption that particles undergo a random flight process, where they move isotropically at a constant speed while experiencing random scatterings. We validate this solution by comparing it with comprehensive simulations of the random flight process and find that it significantly deviates from the solution derived from the Jüttner propagator. This solution is broadly applicable to various diffusion phenomena, such as cosmic-ray propagation. We emphasize that our rigorous solution is particularly crucial in scenarios involving burst-like particle injection, where previous phenomenological approaches to the superluminal diffusion problem may not yield accurate results.

    ↳ astro-ph.HEhep-phApJ(2025)·4 citations
21. 21*

    Mass Spectra in $\mathcal{N}=1$ SQCD, in $\mathcal{N}=1$ SQCD-type theory and in softly broken $\mathcal{N}=2\to \mathcal{N}=1$ SQCD. And problems with the $\mathcal{N}=1$ Seiberg duality

    Victor L. Chernyak🇷🇺

    Mass spectra are calculated for $\mathcal{N}=1$ SQCD and SQCD-type theories and for softly broken $\mathcal{N}=2$ SQCD in vacua with unbroken $Z_{(2N_c-N_F)\ge 2}$ symmetry. It is shown that the Seiberg $\mathcal{N}=1$ duality works, at best, for massless quarks within the conformal window only. Besides: a) the gauge invariant order parameter for scalar quarks is introduced which distinguishes confinement and higgs phases, b) the phase transition are described in $\mathcal{N}=1$ SQCD-type and broken $\mathcal{N}=2$ SQCD theories between confinement and higgs phases, c) the confinement mechanism is proposed for the ordinary YM and $\mathcal{N}=1$ SYM theories.

    ↳ hep-thhep-ph0 citations
22. 22*

    Schwinger Dyson Summation of Perturbation Expansions

    Tom Banks🇺🇸

    We introduce a hierarchical system of approximations for summing both conventional perturbation theory and large N vector expansions of models in quantum field theory and condensed matter physics. Each stage of the hierarchy consists of a closed set of nonlinear equations for one particle irreducible correlation functions with no more than K points and captures the perturbation expansion of each of those functions up to some finite order. As K goes to infinity the full Schwinger Dyson hierarchy is approached. We present an argument that for ordinary finite dimensional integrals, the procedure converges to the exact answer in this limit, despite the fact that no finite order of the hierarchy sees effects from non-leading saddle points of the integral. Some potential applications to the calculation of critical exponents, to low dimensional condensed matter systems, and to the phase structure of the homogeneous electron gas are outlined, but no detailed calculations are presented.

    ↳ cond-mat.str-elhep-lathep-phhep-th3 citations
23. 23*

    cymyc -- Calabi-Yau Metrics, Yukawas, and Curvature

    Per Berglund🇺🇸 · Giorgi Butbaia🇺🇸 · Tristan Hübsch🇺🇸 · Vishnu Jejjala🇿🇦 · Challenger Mishra🇬🇧 · Damián Mayorga Peña🇵🇹 · Justin Tan🇬🇧

    We introduce \texttt{cymyc}, a high-performance Python library for numerical investigation of the geometry of a large class of string compactification manifolds and their associated moduli spaces. We develop a well-defined geometric ansatz to numerically model tensor fields of arbitrary degree on a large class of Calabi-Yau manifolds. \texttt{cymyc} includes a machine learning component which incorporates this ansatz to model tensor fields of interest on these spaces by finding an approximate solution to the system of partial differential equations they should satisfy.

    ↳ hep-thcs.LGhep-phJHEP(2025)·19 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.