Tue·Sep 3, 2024Tuesday·September 3, 2024

1. 01*

   On the smallness of charm loop effects in $B\to K^{(\ast )}\ell \ell$ at low $q^2$: light meson Distribution Amplitude analysis

   Namit Mahajan🇮🇳 · Dayanand Mishra🇮🇳

   The non-local effects originating from the charm quark loops at dilepton invariant masses smaller than the charmonium threshold in $B\to K\ell \ell$ are evaluated with light meson distribution amplitudes. The revised estimates with B-meson distribution amplitude within a Light Cone Sum Rule approach yielded results about three orders smaller than the original computation. In view of the importance of these non-factorizable soft gluon effects, both conceptually and phenomenologically, an independent evaluation is necessary. It is found that to twist-4 accuracy, these soft gluon effects vanish when evaluated employing the kaon distribution amplitude. Similar results hold for $B\to K^{\ast }\ell \ell$ to the leading twist. This eliminates one of the major sources of potential uncertainty which usually makes it difficult for a clear case of new physics, should the data show deviations from the standard model.

   hep-phPRD(2025)·6 citations
2. 02*

   Electroweak Phase Transition in Two Scalar Singlet Model with pNGB Dark Matter

   Dilip Kumar Ghosh🇮🇳 · Koustav Mukherjee🇮🇳 · Shourya Mukherjee🇨🇦

   We investigate the dynamics of the electroweak phase transition within an extended Standard Model framework that includes one real scalar $(\Phi )$ and one complex scalar $(S)$, both of which are SM gauge singlets. The global $U(1)$ symmetry is softly broken to a ${\mathcal{Z}}_3$ symmetry by the $S^3$ term in the scalar potential. After this $U(1)$ symmetry breaking, the imaginary component of the complex scalar $(S)$ acts as a pseudo-Nambu-Goldstone boson (pNGB) dark matter candidate, naturally stabilized by ${\mathcal{Z}}_2$ symmetry of the scenario. Specially, the spontaneous breaking of the global $U(1)$ symmetry to a discrete ${\mathcal{Z}}_3$ subgroup can introduce effective cubic terms in the scalar potential, which facilitates a strong first-order phase transition. We analyze both single-step and multi-step first-order phase transitions, identifying the parameter space that satisfies the dark matter relic density constraints, complies with all relevant experimental constraints, and exhibits a strong first-order electroweak phase transition. The interplay of these criteria significantly restricts the model parameter space, often leading to an under-abundant relic density. Moreover, we delve into the gravitational wave signatures associated with this framework, offering valuable insights that complement traditional dark matter direct and indirect detection methods.

   hep-phJHEP(2025)·8 citations
3. 03*

   Constraints on baryon-number-violating top-quark operators in standard model effective field theory

   Hector Gisbert🇪🇸 · Antonio Rodríguez-Sánchez🇪🇸 · Luiz Vale Silva🇪🇸

   Within the Standard Model Effective Field Theory framework, we set indirect constraints on top quark operators that violate baryon number by one unit above the TeV scale. We find that these constraints are typically many orders of magnitude more stringent than the recently derived direct bounds from collider experiments. Therefore, direct observation of baryon number violation in these top-quark observables at the TeV scale would imply a large fine-tuning among operators across different energy scales. This possibility is not protected under universal radiative corrections or any known symmetry principles.

   hep-phPRD(2025)·9 citations
4. 04*

   tParton: Implementation of next-to-leading order evolution of transversity parton distribution functions

   Congzhou M Sha🇺🇸 · Bailing Ma🇺🇸

   We provide code to solve the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations for the nucleon transversity parton distribution functions (PDFs), which encode nucleon transverse spin structure. Though codes are widely available for the evolution of unpolarized and polarized PDFs, there are few codes publicly available for the transversity PDF. Here, we present Python code which implements two methods of solving the leading order (LO) and next-to-leading order (NLO) approximations of the DGLAP equations for the transversity PDF, and we highlight the theoretical differences between the two.

   hep-phnucl-thphysics.comp-ph0 citations
5. 05*

   Investigation of the semileptonic decay ${\Xi }_{cc}^{++}\to {\Xi }_c^{+}\bar{\ell }{\nu }_{\ell }$ within QCD sum rules

   M. Shekari Tousi🇮🇷 · K. Azizi🇮🇷 · H. R. Moshfegh🇮🇷

   We study the semileptonic decay of the doubly heavy baryon ${\Xi }_{cc}^{++}$ into the singly heavy baryon ${\Xi }_c^{+}$ within the three-point QCD sum rule approach in two possible lepton channels. Our analysis includes perturbative as well as nonperturbative condensation contributions up to dimension 5. We evaluate the form factors of this semileptonic decay entering the amplitude described by the vector and axial vector transition currents. The fit functions of the form factors with respect to the transferred momentum squared are utilized to predict the decay widths and branching ratios of the ${\Xi }_{cc}^{++}\to {\Xi }_c^{+}\bar{\ell }{\nu }_{\ell }$ channels. We compare our findings with other predictions in the literature. Our outcomes can be useful for experimental groups in their search for the weak decays of doubly heavy baryons and may be checked via future experiments such as LHCb.

   hep-phhep-exhep-latPRD(2024)·12 citations
6. 06*

   Corrections from space-time dependent electromagnetic fields to Wigner functions and spin polarization

   Shi-Zheng Yang🇨🇳 · Jian-Hua Gao🇨🇳 · Shi Pu🇨🇳

   We have derived the Wigner equations at global equilibrium with constant vorticity but space-time dependent electromagnetic fields up to second order in semiclassical expansion. We obtain the new second-order contributions to the charge currents and energy-momentum tensor from the varying electromagnetic fields. We also compute the new corrections to the spin polarization pesudo-vector from both contant and varying electromagnetic fields. We also find that the space-time dependent electromagnetic field provides a tighter constraint on the solutions of Wigner functions in global equilibrium compared with constant electromagnetic field.

   hep-phhep-thnucl-thPRD(2025)·7 citations
7. 07*

   Self-consistent constraints on the collision terms in quantum kinetic theory

   Shi-Yuan Wu🇨🇳 · Jian-Hua Gao🇨🇳

   We derive self-consistent constraint conditions for collision terms in quantum kinetic theory using the Wigner function formalism. We present specific solutions for these collision terms that align with the constraints. we develop quantum kinetic theory at relaxation-time approximation. With this framework, we discuss spin polarization and electric charge separation effects in relativistic heavy-ion collisions.

   hep-phhep-thnucl-thPRD(2025)·1 citation
8. 08*

   The study of strongly intensive observables for ${\pi }^{\pm ,0}$ in $pp$ collisions at LHC energy in the framework of PYTHIA model

   Tumpa Biswas🇮🇳 · Dibakar Dhar · Azharuddin Ahmed · Prabir Kumar Haldar🇮🇳 · Abdel Nasser Tawfik🇪🇬

   The fractal and phase transitional properties of each type of pions (i.e. ${\pi }^{\pm ,0}$) through one-dimensional $\eta -$space, at an energy of $\sqrt{s}=13$TeV, have been studied with the help of the Scaled Factorial Moment (SFM) framework. To generate simulated data sets for $pp$ collisions under the minimum bias (MB) condition at $\sqrt{s}=13$TeV, we have employed the Monte Carlo-based event simulator PYTHIA. Various parameters such as the Levy index $(\mu )$, degree of multifractality $(r)$, anomalous fractal dimension $(d_q)$, multifractal specific heat $(c)$ and critical exponent $(\nu )$ have been calculated. To study the Bose Einstein(BE) effect due to identical particles (here pions) we have also derived these parameters for mixed pion pairs (i.e. $\{{\pi }^{+},{\pi }^{-}\}$, $\{{\pi }^{+},{\pi }^0\}$ and $\{{\pi }^{-},{\pi }^0\}$) and we find that the effects of identical particles weakened for the mixture with respect to the individual distributions. The quest for the quark-hadron phase transition has also been conducted within the framework of the Ginzburg-Landau (GL) theory of second-order phase transition. Analysis revealed that for PYTHIA-generated MB events, there is a clear indication of the quark-hadron phase transition according to the GL theory. Furthermore, the values of the multifractal specific heat ($c$) for each ${\pi }^{+},{\pi }^{-},{\pi }^0$ and the mixture pair data sets of pions generated by PYTHIA model at MB condition, indicate a transition from multifractality to monofractality in $pp$ collisions at $\sqrt{s}=13$TeV.

   hep-phActa Phys.Polon.B(2024)·3 citations
9. 09*

   Neutrino oscillations from the perspective of the quantum Yang-Baxter equations

   Ivan Arraut · Enrique Arrieta-Diaz🇨🇴

   The origins of neutrino masses is one of the biggest mysteries in modern physics since they are beyond the realm of the Standard Model. As massive particles, neutrinos undergo flavor oscillations throughout their propagation. In this paper we show that when a neutrino oscillates from a flavor state {\alpha} to a flavor state \b{eta}, it follows three possible paths consistent with the Quantum Yang- Baxter Equations. These trajectories define the transition probabilities of the oscillations. Moreover, we define a probability matrix for flavor transitions consistent with the Quantum Yang-Baxter Equations, and estimate the values of the three neutrino mass eigenvalues within the framework of the triangular formulation.

   hep-ph0 citations
10. 10*

    Probing heavy meson lightcone distribution amplitudes with heavy quark spin symmetry

    Zhi-Fu Deng🇨🇳 · Wei Wang🇨🇳 · Yan-Bing Wei🇨🇳 · Jun Zeng🇨🇳

    Building on a previous work~\cite{Han:2024min}, we illustrate that the leading-twist light-cone distribution amplitudes (LCDAs) defined in heavy-quark effective theory (HQET) can be determined through lattice simulations of quasi-distribution amplitudes (quasi-DAs) with a large momentum component $P^z$. Exploiting heavy-quark spin symmetry, we show that the LCDAs for a heavy pseudoscalar and vector meson in the context of HQET exhibit degeneracy, and the degeneracy allows for the utilization of quasi DAs for both pseudoscalar and vector mesons on the lattice. We then derive the relevant short-distance coefficients for the matching between LCDAs defined with QCD fields and HQET LCDAs at the one-loop level. The incorporation of these three quasi DAs can not only confirm the methodology introduced in Ref.~\cite{Han:2024min} but also provides possible insight into power corrections. Discrepancies between the corresponding results offer a valuable perspective for estimating power corrections within the system which are imperative for precise investigations into heavy-meson LCDAs in the future particularly in the context of lattice QCD.

    hep-phhep-latPRD(2024)·14 citations
11. 11*

    Charm Sivers function at EicC

    Senjie Zhu🇨🇳 · Duxin Zheng🇨🇳 · Lei Xia🇨🇳 · Yifei Zhang🇨🇳

    The Electron-Ion Collider in China (EicC) is pivotal in enhancing our knowledge of the internal structure of nucleons and nuclei, particularly through the study of transverse momentum-dependent parton distributions (TMDs). Among the leading-twist TMDs, the Sivers function is of particular interest, as it provides crucial insights into the spin and momentum structure of hadrons and plays a significant role in describing transverse single spin asymmetries (SSAs) in high-energy scatterings. In this study, we focus on the theoretical framework and phenomenological implications of the Sivers function in the context of small-x physics, where it is intricately connected to the spin-dependent QCD odderon, demonstrating that the SSA can be expressed in terms of transverse momentum-dependent factorization within the Color Glass Condensate effective theory. Furthermore, we present simulation results using PythiaeRHIC to assess the feasibility of measuring the charm quark Sivers function at EicC. The simulation outcomes suggest that EicC, with its unique kinematic coverage, offers distinct advantages for probing the Sivers function, which would provide compelling evidence for the existence of the elusive spin-dependent odderon.

    hep-phnucl-exPRD(2025)·6 citations
12. 12*

    Processes $\gamma \gamma \to {\varphi }_i{\varphi }_j$ in Inert Higgs Doublet Models and Two Higgs Doublet Models

    Khiem Hong Phan (Duy Tan Univ.)🇩🇰 · Dzung Tri Tran (Duy Tan Univ.)🇩🇰 · Thanh Huy Nguyen (HCMUS)🇻🇳

    In this paper, we present a phenomenological analysis of one-loop induced processes $\gamma \gamma \to {\varphi }_i{\varphi }_j$, where the CP-even Higgs bosons are denoted as ${\varphi }_{i,j}\equiv h,H$, in high-energy photon-photon collisions, within the frameworks of the Inert Higgs Doublet Model and the Two Higgs Doublet Model. The total cross sections are evaluated as functions of the center-of-mass energy, finding that the cross sections for the considered processes in all the models under investigation are significantly enhanced around the threshold for charged Higgs boson pair production ($\sim 2M_{H^{\pm }}$). Furthermore, the enhancement factors, defined as the ratios of cross sections of $\gamma \gamma \to {\varphi }_i{\varphi }_j$ in the investigated models to those for $\gamma \gamma \to hh$ in the Standard Model, are examined in the relevant regions of the model's parameter space. In the Inert Higgs Doublet Model, the factors are studied in the parameter space of $(M_{H^{\pm }},{\mu }_2^2)$ and $(M_{H^{\pm }},{\lambda }_2)$. In the Two Higgs Doublet Model, the factors are examined in the planes defined by $(M_{H^{\pm }},t_{\beta })$ as well as in the space of the charged Higgs mass $M_{H^{\pm }}$ and the soft-breaking $Z_2$ parameter $m_{12}^2$. Two scenarios characterized by $c_{\beta -\alpha }>0$ and $c_{\beta -\alpha }<0$ are studied in further detail. The factors exhibit distinct behaviors between these two scenarios. As a result, it is possible to discriminate between them at future colliders. The dependence of the cross section for the process $\gamma \gamma \to hH$ on $m_{12}^2$ provides a potential probe of the soft $Z_2$-breaking scale in the Two Higgs Doublet Model.

    hep-ph5 citations
13. 13*

    Summing large Pomeron loops in the saturation region: amplitude and multiplicity distributions for dipole-dipole scattering

    Eugene Levin (Tel Aviv U.)🇮🇱

    In this paper we found the parton densities at high energies. Their expressions stems from our attempts to reconcile the exact solution to the Balitsky-Kovchegov (BK) equation, which describes the rare fluctuation in the dipole-target scattering, with the fact that this equation sums the 'fan' Pomeron diagrams. Using these densities we can calculate the contributions of large Pomeron loops to dipole-dipole scattering at high energies. We detected that the scattering matrix for this process has the same suppression as was predicted by Iancu and Mueller from their estimates of the 'rare' fluctuation in QCD. Applying the Abramovsky,Gribov and Kancheli cutting rules we found that the produced gluons are distributed accordingly the KNO (Koba, Nielsen and Olesen) law which leads to the entropy $S_E=\ln (xG(x,Q^2))$. $xG$ has to be in the saturation region at high energies.

    hep-phPRD(2024)·7 citations
14. 14*

    Particle production by $\gamma$-$\gamma$ interactions in future electron-ion colliders

    Carlos A. Bertulani🇺🇸 · Reinaldo Francener🇧🇷 · Victor P. Goncalves🇧🇷 · Juciene T. de Souza🇧🇷

    The particle production in photon-photon ($\gamma \gamma$) interactions present in electron-ion collisions is investigated. We present calculations for the total cross sections and event rates related to the production of light mesons [$\eta ,{\eta }^{\prime },f_0$ and $f_2$], charmonium [${\eta }_c$ and ${\chi }_c$] and charmoniumlike [$X(3915),X(3940),X(4140)$ and $X(6900)$] states, considering the EIC, EicC, LHeC and FCC-eh energies. Our predictions demonstrate that experimental studies of these processes are feasible and useful to constrain the properties of light mesons and quarkonium states and shed some light on the configuration of the considered charmoniumlike states.

    hep-phnucl-thPRC(2025)·7 citations
15. 15*

    Charmonium pair production at the LHCb in the ICEM using the $k_T$-factorization: DPS versus SPS

    Alexey Chernyshev🇷🇺 · Vladimir Saleev🇷🇺

    In the article, we study pair production of $\psi [1S]$ and $\psi [2S]$ charmonium states in the forward rapidity region of the LHCb experiment at the $\sqrt{s}=13$ TeV using the improved color evaporation model and the parton Reggeization approach, which is a gauge invariant version of the $k_T$-factorization approach. Taking into account single and double parton scattering mechanisms and using the set of model parameters which have been fixed early, we compare our theoretical predictions with the recent LHCb experimental data as well as with another theoretical predictions. The numerical calculations are performed using the parton--level Monte-Carlo event generator KaTie and modified KMRW model for unintegrated parton distribution functions. We have found absolutely dominant role of the double parton scattering mechanism in the charmonium pair production at the LHCb.

    hep-phMod.Phys.Lett.A(2025)·1 citation
16. 16*

    Evolution of the hot dense matter at LHC energies through light and heavy-flavor hadrons using non-extensive thermodynamics

    László Gyulai🇭🇺 · Gábor Bíró🇭🇺 · Róbert Vértesi🇭🇺 · Gergely Gábor Barnaföldi🇭🇺

    We investigate the formation and evolution of hot systems comprising charmed and light hadrons using non-extensive thermodynamics. We analyze data from pp, p--Pb, and Pb--Pb collisions at center-of-mass energies ranging from $\sqrt{s_{\mathrm{NN}}}=2.76$~TeV to 13~TeV, measured by the CERN LHC ALICE experiment. The hadron species examined include charged pions and kaons, ${\mathrm{K}}_{\mathrm{s}}^0$, (anti)protons, $\varphi$ mesons, ${\Lambda }^0$ hyperons, and D mesons. Employing our previously established methods, we determine the common Tsallis parameters $T_{\mathrm{eq}}$ and $q_{\mathrm{eq}}$ for each hadron type. While charm comes from earlier than light hadrons, we see that $T_{\mathrm{eq}}$ is ordered by mass, reflecting a similar ordering in the time-scale relevant for the spectrum. Our results also allow for constraining the heat capacity of the system. The current analysis thus enhances our understanding of hadron production dynamics and thermal properties in high-energy collisions.

    hep-phInt.J.Mod.Phys.A(2025)·3 citations
17. 17*

    QCD Perturbation Theory: It's not what you were taught

    P. M. Stevenson🇺🇸

    Physical quantities in QCD do not depend upon ${\alpha }_s(Q)$. There is no way to measure ${\alpha }_s(Q)$ experimentally. If those statements sound shocking, please read on. They are actually well-known facts, though ones that are constantly being ignored in the QCD literature. Renormalized perturbation theory is not an ordinary power-series expansion; its renormalization-scheme ambiguity is not merely a minor nuisance. Rather, it is a structure in which invariance under redefinitions of the coupling is a fundamental symmetry -- a symmetry that, like any other, deserves respect. I speak bluntly because without a change in mindset perturbative QCD can never become a proper, scientific enterprise.

    hep-phhep-exhep-th0 citations
18. 18*

    Deep Inelastic Scattering Cross Section Uncertainties in Tau Neutrino Appearance Measurements

    Tetiana Kozynets🇩🇰 · Thomas Stuttard🇩🇰 · D. Jason Koskinen🇩🇰

    In neutrino experiments sensitive to multiple flavors, the analyzers may be presented with a choice of treating the uncertainties on the respective cross sections in a correlated or an uncorrelated manner. This study focuses on the charged current deep inelastic scattering (CC DIS) channel in experiments sensitive to both muon and tau neutrinos. We evaluate the ratio of the leading-order ${\nu }_{\tau }$ and ${\nu }_{\mu }$ cross sections and derive its uncertainty from the underlying parton distribution functions (PDFs). We find that, for neutrino energies above 5 GeV, the PDF-driven uncertainty on the cross section ratio is less than 3%, with a larger (2-30%) variation seen in antineutrinos at energies below 10 GeV. These results suggest that for atmospheric tau neutrino appearance analyses, the uncertainties in ${\nu }_{\tau }$ and ${\nu }_{\mu }$ DIS cross sections should be coupled, while separate treatment for the two flavors may be warranted in long-baseline experiments with an antineutrino beam. We further explore the role of the invariant hadronic mass threshold defining the onset of the DIS regime. We argue that its impact may be incorporated only if it is applied to both DIS and resonance cross sections, and if the correlations with other DIS and resonance cross section parameters are taken into account.

    hep-phhep-exPRD(2025)·1 citation
19. 19*

    Probing Anomalous Higgs Boson Couplings at Colliders

    Biswajit Das🇮🇳

    In this thesis, our main focus is on the $HHH$ and $VVHH$ couplings which are loosely bound. The $HHH$ coupling will determine the shape the Higgs potential and $VVHH$ couplings will tell us how the gauge bosons are coupled to the Higgs fields. We consider a few processes of Higgs boson production and decay to study these couplings. We calculate one-loop QCD and electroweak correction for these processes. In this thesis, we discuss spinor helicity formalism, which has been used in computing Feynman amplitudes for QCD and electroweak correction to these processes. We discuss one-loop Feynman integrals and one-loop electroweak renormalization and Catani-Seymour dipole subtraction scheme in this thesis. We compute all possible self-energy contributions at one-loop for electroweak renormalization. In this thesis, in the first work, we consider the process $b\bar{b}\to W^{+}{W}^{-}H$. Due to the non-negligible coupling of the Higgs boson with the bottom quarks, there is a dependence on the $WWHH$ coupling in this process. We find that the corrections to the final state with the longitudinally polarized $W$ bosons are large. In the second work, we study one-loop electroweak correction to $H\to {\nu }_e\overline{{\nu }_e}{\nu }_{\mu }\overline{{\nu }_{\mu }}$. We discuss ${\gamma }^5$-anomaly, complex mass scheme and input parameter schemes which are relevant for one-loop electroweak correction. The corrections depend on the $HHH$ and $ZZHH$ couplings. We investigate this dependence in $\kappa$-framework. In the third work, we study one-loop electroweak correction to the $H\to e^{+}{e}^{-}{\mu }^{+}{\mu }^{-}$ process. The corrections depend on $HHH$ and $ZZHH$ couplings. We observe the same behavior in the relative change of the decay width for this process as the process $H\to {\nu }_e\overline{{\nu }_e}{\nu }_{\mu }\overline{{\nu }_{\mu }}$ when we vary $HHH$ and $ZZHH$ couplings.

    hep-phhep-th2 citations
20. 20*

    Signature of (axial)vector operators in $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays

    Manas Kumar Mohapatra🇮🇳 · Ajay Kumar Yadav🇮🇳 · Suchismita Sahoo🇮🇳

    The persistent anomalies observed in $B$ mesons related to $b\to s{\mu }^{+}{\mu }^{-}$ transitions point to the potential for new physics beyond the Standard Model. To explore this further, we conduct an analysis of the exclusive semileptonic decays $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$ within an effective field theory formalism. We perform a global fit to new (axial)vector couplings using the current experimental data for $b\to s{\mu }^{+}{\mu }^{-}$ transitions. We compute the branching ratios and physical observables such as forward-backward asymmetries, lepton polarization asymmetries, form factor independent observables for $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$, both within the Standard Model and in new physics scenarios. Additionally, we examine the existence of lepton flavor universality violation in the $B_c\to D_s^{(\ast )}{\ell }^{+}{\ell }^{-}$ process.

    hep-phPLB(2026)·3 citations
21. 21*

    Loop Tree Duality with generalized propagator powers: numerical UV subtraction for two-loop Feynman integrals

    Daniele Artico🇩🇪

    An explicit Loop Tree Duality (LTD) formula for two-loop Feynman integrals with integer power of propagators is presented and used for a numerical UV divergence subtraction algorithm. This algorithm proceeds recursively and it is based on the $\mathcal{R}$ operator and the Hopf algebraic structure of UV divergences. After a short review of LTD and the numerical evaluation of multi-loop integrals, LTD is extended to two-loop integrals with generalized powers of propagators. The $\mathcal{R}$ operator and the tadpole UV subtraction are employed for the numerical calculation of two-loop UV divergent integrals, including the case of quadratic divergences.

    hep-phmath-phmath.MPPoS(2024)·0 citations
22. 22*

    Binding of the three-hadron $D{D}^{\ast }K$ system from the lattice effective field theory

    Zhenyu Zhang🇨🇳 · Xin-Yue Hu🇨🇳 · Guangzhao He🇨🇳 · Jun Liu🇨🇳 · Jia-Ai Shi🇨🇳 · Bing-Nan Lu🇨🇳 · Qian Wang🇨🇳

    We employ the nuclear lattice effective field theory (NLEFT), an efficient tool for nuclear ab initio calculations, to solve the asymmetric multihadron systems. We take the $D{D}^{\ast }K$ three-body system as an illustration to demonstrate the capability of the method. Here the two-body chiral interactions between $D$, $D^{\ast }$, and $K$ are regulated with a soft lattice regulator and calibrated with the binding energies of the $T_{cc}^{+}$, $D_{s0}^{\ast }(2317)$, and $D_{s1}(2460)$ molecular states. We then calculate the three-body binding energy using the NLEFT and analyze the systematic uncertainties due to the finite volume effects, the sliding cutoff, and the leading-order three-body forces. Even when the three-body interaction is repulsive (even as large as the infinite repulsive interaction), the three-body system has a bound state unambiguously with binding energy no larger than the $D_{s1}(2460)D$ threshold. To check the renormalization group invariance of our framework, we extract the first excited state. We find that when the ground state is fixed, the first excited states with various cutoffs coincide with each other when the cubic size goes larger. In addition, the standard angular momentum and parity projection technique is implemented for the quantum numbers of the ground and excited states. We find that both of them are $S$-wave states with quantum number $J^P=1^{-}$. Because the three-body state contains two charm quarks, it is easier to be detected in the Large Hadron Collider.

    hep-phPRD(2025)·18 citations
23. 23*

    Vacuum polarisation effects in impulsive fields

    Anton Ilderton🇬🇧 · Hannah Kingham🇬🇧

    Photons impinging on strong electromagnetic fields can change both momentum and helicity state, due to quantum vacuum polarisation. We investigate these effects in the collision of photons with impulsive PP-waves, which describe e.g. the fields of ultra-boosted charge distributions. We connect our results to vacuum birefringence and quantum reflection in both QED and SUSY QED. We also compare with helicity flip in plane wave backgrounds, exploring how and when known tree-level relations, relating amplitudes in PP-waves and in plane waves, extend to one-loop corrections.

    hep-phhep-thPRD(2024)·4 citations
24. 24*

    $(g-2{)}_{e,\mu }$ and Lepton flavor violating decays in a left-right model

    L.T. Hue🇻🇳 · Khiem Hong Phan🇻🇳 · T.T. Hong🇻🇳 · T. Phong Nguyen🇻🇳 · N. H. T. Nha🇻🇳

    General expressions for one-loop contributions associated with lepton-flavor violating decays of the standard model-like Higgs boson $h\to e_b^{\pm }{e}_a^{\mp }$ and gauge boson $Z\to e_b^{\pm }{e}_a^{\mp }$ are introduced in the unitary gauge. The results are used to discuss these decays as new physics signals in a minimal left-right symmetric model containing only one bidoublet Higgs and a $SU(2{)}_R$ Higgs doublet accommodating data of neutrino oscillations and $(g-2{)}_{\mu }$. The numerical investigation indicates that some of these decay rates can reach near future experimental sensitivities.

    hep-phEPJC(2024)·4 citations
25. 25*

    Density correlations under global and local charge conservation

    Volodymyr Vovchenko🇺🇸

    This work presents a formalism to compute spatial $n$-point correlations of a conserved charge density in a large thermal system in the canonical ensemble, with explicit results presented up to 4th order. The resulting correlators contain local and balancing terms expressed through the grand-canonical susceptibilities for any equation of state. The new formalism is used to introduce a Gaussian local baryon number conservation in (spatial) rapidity in heavy-ion collisions at LHC conditions through a modulation of the balancing term. Connection to the conservation volume $V_c$ approach is established, indicating that the latter is appropriate for observables within a limited range around midrapidity. Quantitative analysis of the experimental data of the ALICE Collaboration on net proton cumulants in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV shows significant evidence for local baryon conservation.

    hep-phnucl-exnucl-thPRC(2024)·13 citations
26. 26*

    Towards self-consistent models for Inflation and Early Universe Cosmology

    Adriana Menkara🇰🇷

    In this PhD thesis we take smalls steps towards linking our knowledge of the Early Universe with our knowledge of particle physics. Chapters 3, 4 and 5 deal with Higgs inflation UV completions and their phenomenology. In Chapter 6 we consider a model for natural inflation with twin waterfalls, in which a Z2 symmetry is responsible for the radiative stability of the potential. Including a separate Z2' symmetry allows us to identify one of the waterfall fields with Dark Matter, that can be sufficiently produced during preheating. In Chapter 7, we take conformal couplings and expand around the pole of the Einstein-frame kinetic term. Using this structure we can recover successful Higgs inflation without the need of a large non-minimal coupling. Finally, in Chapter 8 we apply the setup to the Peccei-Quinn field responsible for the axion solution the Strong CP problem, and reproduce the observed Dark Matter relic abundance through the axion kinetic misalignment mechanism.

    hep-ph0 citations
27. 27*

    Origins and impacts of dynamical diquark correlations -- A continuum Schwinger functional approach --

    Jorge Segovia🇪🇸

    This conference proceedings contribution emphasizes the emergent hadron mass paradigm, which accounts for the majority of the visible mass in the universe, beyond the Higgs boson mechanism. The study delves into the Landau gauge gluon propagator and the dynamical generation of gluon mass, as well as the dressed-quark propagator and dynamical chiral symmetry breaking. It also tackles the baryon bound state problem through the Poincaré-covariant Faddeev equation, analyzing the composition and masses of octet and decuplet baryons. The document concludes with a discussion on the electromagnetic form factors of the nucleon and its first radial excitation, providing insights into the quark-diquark structure within baryons.

    hep-phhep-exhep-latnucl-ex+1PoS(2025)·0 citations
28. 28*

    CODATA Recommended Values of the Fundamental Physical Constants: 2022

    Peter Mohr🇺🇸 · David Newell🇺🇸 · Barry Taylor🇺🇸 · Eite Tiesinga🇺🇸

    We report the 2022 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council (CODATA). The recommended values can also be found at physics.nist.gov/constants. The values are based on a least-squares adjustment that takes into account all theoretical and experimental data available through 31 December 2022. A discussion of the major improvements as well as inconsistencies within the data is given.

    hep-phRMP(2025)·136 citations
29. 29*

    On the Origin of the $SO(9)\to SO(3)\times SO(6)$ Symmetry Breaking in the IKKT Matrix Model

    Robert Brandenberger🇨🇦 · Julia Pasiecznik (McGill)🇨🇦

    We suggest a dynamical mechanism which explains why in the supersymmetric IKKT matrix model the $SO(9)$ symmetry of the Lagrangian is spontaneously broken to $SO(3)\times SO(6)$, allowing only three large classical spatial dimensions to emerge. The argument relies on the identification of D1-strings as stable excitations of the matrices about the cosmological background, and the absence of forces between parallel D1-string excitations. A spatial dimension can only become large if the D1-strings winding that direction can annihilate. In the absence of forces, this requires the string world sheets to intersect, a process which is highly suppressed if more than three dimensions of space are large. Implications for a recently proposed matrix cosmology scenario are discussed.

    ↳ hep-thastro-ph.COgr-qchep-phPRD(2025)·8 citations
30. 30*

    Mini-Proceedings of the "Fourth International Workshop on the Extension Project for the J-PARC Hadron Experimental Facility (HEF-ex 2024)"

    P.Achenbach🇺🇸 · K.Aoki🇯🇵 · S.Aoki · C.Curceanu🇮🇹 · S.Diehl🇩🇪 · T.Doi🇯🇵 · M.Endo · M.Fujita🇯🇵 · T.Fukuda🇯🇵 · H.Garcia-Tecocoatzi🇮🇹 · L.S.Geng🇨🇳 · T.Gunji🇯🇵 and 49 other authors

    The mini proceedings of the "Fourth International Workshop on the Extension Project for the J-PARC Hadron Experimental Facility (HEF-ex 2024) [https://kds.kek.jp/event/46965]" held at J-PARC, February 19-21, 2024, are presented. The workshop was devoted to discussing the physics case that connects both the present and the future Hadron Experimental Facility at J-PARC, covering a wide range of topics in flavor, hadron, and nuclear physics related to both experimental and theoretical activities being conducted at the facility.

    ↳ nucl-exhep-exhep-phnucl-th5 citations
31. 31*

    Impact of extreme magnetic fields on the QCD topological susceptibility in the vicinity of the crossover region

    B. B. Brandt🇩🇪 · G. Endrődi🇩🇪 · J. J. Hernández Hernández🇩🇪 · G. Markó🇩🇪

    We present the first determination of the topological susceptibility from lattice QCD in the presence of strong background magnetic fields. Our simulations employ 2+1 flavours of stout improved staggered quarks with physical masses and cover a broad range of temperatures and magnetic field values. The results are extrapolated to the continuum limit using four different lattice spacings and an eigenvalue reweighting technique to reduce discretisation errors. For low temperatures, our calculations show an enhancement of the topological susceptibility due to the magnetic field, compatible with predictions from chiral perturbation theory. At high temperatures, we observe the impact of inverse magnetic catalysis on the susceptibility.

    ↳ hep-lathep-exhep-phhep-thJHEP(2025)·10 citations
32. 32*

    Analytic results in aligned axion inflation

    Federico Greco🇮🇹 · Marco Peloso🇮🇹

    The original model of axion natural inflation produces a tensor-to-scalar ratio above the experimental limit. Aligned axion inflation admits inflationary trajectories that originate near a saddle point of the two-field potential, and terminate due to the instability of the orthogonal direction. The phenomenology of these solutions is within the current constraints, and a range of parameters will be probed by the next stage CMB experiments. We provide the analytic solution for these trajectories and very compact analytic expressions for the associated phenomenology. For parameters leading to the observed value for the scalar spectral tilt the extension of the inflationary trajectory is sub-Planckian. However, one eigenvalue of the axion kinetic matrix (in the basis that diagonalizes the potential) is trans-Planckian. Finally, we discuss the post-inflationary evolution after the instability. In some cases, the fields reach a second inflationary valley, connected to a minimum. Multiple stages of inflation might be a more general occurrence in multiple-field inflationary models with trajectories starting next to critical points.

    ↳ astro-ph.COhep-phhep-thJCAP(2025)·4 citations
33. 33*

    Decoding Dark Matter Admixed Neutron Stars: From Static Structure to Rotational Deformation

    Pinku Routaray🇮🇳 · Abirbhav Chakrawarty🇮🇳 · N. K. Patra🇨🇳 · Bharat Kumar🇮🇳

    In this study, we investigate the impacts of dark matter (DM) on the properties of both static and rotating neutron stars utilizing a self-interacting DM model, motivated by the neutron decay anomaly. DM-admixed NSs are modeled by assuming chemical equilibrium between ordinary matter and the dark sector, treating a single-fluid Tolman-Oppenheimer-Volkoff (TOV) framework. By treating the DM interaction strength ($G$) as a free parameter, we explore its influence on NS properties, considering a broad range of equations of state (EoSs). Using the mass-radius constraints from NICER pulsar measurements, we constrain the DM interaction strength for each EoS via a likelihood analysis. Extending this model to rotating NSs, we analyze how centrifugal forces associated with increasing angular velocity ($\Omega$) enhance both mass and radius, causing deformation. We assess the impact of DM on rotational deformation by calculating the eccentricity, highlighting the interplay between DM and rotational forces. Since both DM and rotation simultaneously influence NS properties, we compute the relative changes in mass and radius across varying $G$ and $\Omega$ values to quantify their combined effects.

    ↳ astro-ph.HEgr-qchep-phnucl-thPhys.Dark Univ.(2025)·10 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.