Wed·Jul 19, 2023Wednesday·July 19, 2023

1. 01*

   The impact of electric currents on Majorana dark matter at freeze out

   Lukas Karoly🇺🇸 · David C. Latimer🇺🇸

   Thermal relics with masses in the GeV to TeV range remain possible candidates for the Universe's dark matter (DM). These neutral particles are often assumed to have vanishing electric and magnetic dipole moments so that they do not interact with single real photons, but the anapole moment can still be nonzero, permitting interactions with single virtual photons. This anapole moment allows for p-wave annihilation of DM into standard model particles, and the DM interacts with external electric currents via the anapole moment. Moving beyond their static electromagnetic properties, these particles generically have non-zero polarizabilities which mediate interactions with two real photons; in particular, spin-dependent polarizibilities admit s-wave annihilation of the DM into two photons. When the Universe cools from a temperature on the order of the DM mass to freeze out, the DM is in thermal equilibrium with the background plasma of particles, but the comoving DM density decreases due to annihilation. If a collection of initially unpolarized DM particles were subjected to an electric current, then the DM medium would become partially polarized, according to the Boltzmann distribution, with a slight excess of anapole moments aligned with the current, relative to those anti-aligned. For this region of partially polarized DM particles, the s-wave annihilation mode becomes partially suppressed because it requires a state of vanishing angular momentum. As a consequence, the decreased DM annihilation rate in this region will result in an excess of DM density, relative to an unpolarized region, as DM drops out of thermal equilibrium. We explored this relative change of DM density for DM that is subjected to an electric current through freeze out.

   hep-phhep-thUniverse(2025)·1 citation
2. 02*

   A view of Coherent Elastic Neutrino-Nucleus Scattering

   M. Cadeddu🇮🇹 · F. Dordei🇮🇹 · C. Giunti🇮🇹

   We review the physics of coherent elastic neutrino-nucleus scattering and the results and perspectives for the measurements of the radius of the neutron distribution of the nucleus, of the weak mixing angle, and of new neutrino interactions due to physics beyond the Standard Model.

   hep-phhep-exnucl-exnucl-thEPL(2023)·34 citations
3. 03*

   Triple Charmonium Production in pQCD

   B. Blok🇮🇱 · J. Mehl (Technion)🇮🇱

   We study the role of $1\to 2$ and $1\to 3$ processes in triple charmonium production. We see that the ratio of effective cross sections of TPS and DPS only moderately depends on charmonium transverse momenta, but the total DPS and TPS cross sections each separately may have rather strong dependence on charmonia transverse momenta in the central kinematics that can be studied experimentally.

   hep-phhep-exnucl-exnucl-thEPJC(2024)·1 citation
4. 04*

   Universality of sound modes in kinetic theory

   Xiaojian Du🇪🇸 · Stephan Ochsenfeld🇩🇪 · Sören Schlichting🇩🇪

   We present a simple approach to extract hydrodynamic sound modes and non-hydrodynamic modes in kinetic theories from response functions of the energy-momentum tensor. By comparing the response functions in four types of kinetic theories, namely the Relaxation-Time Approximation, scalar ${\varphi }^4$ theory, SU(3) Yang-Mills theory and QCD kinetic theory, we find a remarkable degree of universality for the sound mode, even beyond the hydrodynamic regime.

   hep-phnucl-thPoS(2024)·1 citation
5. 05*

   The singly-charmed pentaquark molecular states via the QCD sum rules

   Qi Xin🇨🇳 · Xiao-Song Yang🇨🇳 · Zhi-Gang Wang🇨🇳

   In this work, we systematically investigate the singly-charmed pentaquark molecular states $D^{(\ast )}N$, $D^{(\ast )}{\Xi }^{(\ast )}$ and $D_s^{(\ast )}{\Xi }^{(\ast )}$ with the QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension 13 and taking fully account of the light-flavor $SU(3)$ breaking effects. The numerical results favor assigning the ${\Omega }_c(3185)$ as the $D\Xi$ molecular state with the $J^P={\frac{1}{2}}^{-}$ and $|I,I_3⟩=|0,0⟩$, assigning the ${\Omega }_c(3327)$ as the $D^{\ast }\Xi$ molecular state with the $J^P={\frac{3}{2}}^{-}$ and $|I,I_3⟩=|0,0⟩$, assigning the ${\Sigma }_c(2800)$ as the $DN$ molecular state with the $J^P={\frac{1}{2}}^{-}$ and $|I,I_3⟩=|1,0⟩$, and assigning the ${\Lambda }_c(2940)/{\Lambda }_c(2910)$ as the $D^{\ast }N$ molecular state with the $J^P={\frac{3}{2}}^{-}$ and $|I,I_3⟩=|0,0⟩$. Other potential molecule candidates are also predicted, which may be observed in future experiments. For example, we can search for the $D\Xi$ and $D^{\ast }\Xi$ molecular states with the isospin $|I,I_3⟩=|1,\pm 1⟩$ in the ${\Xi }_c^{+}{\bar{K}}^0$ and ${\Xi }_c^0{\bar{K}}^{-}$ mass spectrum respectively in the future, which could shed light on the nature of the ${\Omega }_c(3185/3327)$.

   hep-phInt.J.Mod.Phys.A(2023)·28 citations
6. 06*

   Energy loss effects in EECs at LO

   João Barata🇺🇸 · Yacine Mehtar-Tani🇺🇸

   In recent years, there has been an effort towards establishing a more complete picture for jet substructure in the presence of the quark gluon plasma. Such a program requires not only a more detailed description of medium induced effects, but also the design of novel substructure observables. Very recently, it has been noticed that Energy Energy correlators (EECs) might provide one type of such observables. Although the full extent of their sensitivity to the medium has not been completely explored, they are capable to resolve the transverse structure of the jet. In particular, they are sensitive to the critical angle separating coherent and decoherent jet evolution in the medium. In this talk, we show for the first time the effects of medium induced radiative energy loss in EECs at leading order in the number of vacuum-like emissions. The calculation takes into account all order soft gluon emissions, in the large $N_c$ limit and neglecting subdominant interfering contributions.

   hep-phPoS(2024)·11 citations
7. 07*

   Kaon and strangeonium spectrum in Regge phenomenology

   Juhi Oudichhya🇮🇳 · Keval Gandhi🇮🇳 · Ajay Kumar Rai🇮🇳

   In the present work, the mass-spectra of the light mesons, the kaons ($u\overline{s}$) and strangeonium ($s\overline{s}$) is systematically studied within the framework of Regge phenomenology. Several relations between Regge slope, intercept, and meson masses are extracted with the assumption of linear Regge trajectories. Using these relations the ground state masses ($1^1{S}_0$ and $1^3{S}_1$) of the pure $s\overline{s}$ states are evaluated. Further, the Regge slopes are extracted for kaons and strangeonium to obtain the orbitally excited state masses in the ($J,M^2$) plane. Similarly, the values of Regge parameters are calculated in the ($n,M^2$) plane for each Regge trajectory and obtain the radially excited state masses of mesons lying on that Regge trajectory. We compared our obtained spectrum with the experimental observations where available and with the predictions of other theoretical approaches. Here, we predict the possible quantum numbers of several recently observed experimental states, which still require further verification, and also evaluate the higher orbital and radial excited states that may be detected in the near future. We expect our predicted results could provide valuable information for future experimental searches for missing excited kaons and strangeonium mesons.

   hep-phPRD(2023)·31 citations
8. 08*

   Theoretical study on ${\Lambda }_c^{+}\to \Lambda K^{+}{\bar{K}}^0$ decay and ${\Xi }^{\ast }(1690)$ resonance

   Si-Wei Liu🇨🇳 · Qing-Hua Shen🇨🇳 · Ju-Jun Xie🇨🇳

   We present a theoretical study of ${\Xi }^{\ast }(1690)$ resonance in the ${\Lambda }_c^{+}\to \Lambda K^{+}{\bar{K}}^0$ decay, where the weak interaction part proceeds through the Cabibbo-favored process $c\to s+u\bar{d}$. Next, the intermediate two mesons and one baryon state can be constructed with a pair of $q\bar{q}$ with the vacuum quantum numbers. Finally, the ${\Xi }^{\ast }(1690)$ is mainly produced from the final state interactions of $\bar{K}\Lambda$ in coupled channels, and it is shown in the $\bar{K}\Lambda$ invariant mass distribution. Besides, the scalar meson $a_0(980)$ and nucleon excited state $N^{\ast }(1535)$ are also taken into account in the decaying channels $K^{+}{\bar{K}}^0$ and $K^{+}\Lambda$, respectively. Within model parameters, the $K^{+}{\bar{K}}^0$, ${\bar{K}}^0\Lambda$ and $K^{+}\Lambda$ invariant mass distributions are calculated, and it is found that our theoretical results can reproduce well the experimental measurements, especially for the clear peak around $1690$ MeV in the $\bar{K}\Lambda$ spectrum. The proposed weak decay process ${\Lambda }_c^{+}\to \Lambda K^{+}{\bar{K}}^0$ and the interaction mechanism can provide valuable information on the nature of the ${\Xi }^{\ast }(1690)$ resonance.

   hep-phhep-exnucl-exnucl-thPRD(2023)·12 citations
9. 09*

   Radiative energy loss of heavy quark through soft gluon emission in QGP

   Taesoo Song🇩🇪 · Ilia Grishmanovskii🇩🇪 · Olga Soloveva🇩🇪 · Elena Bratkovskaya🇩🇪

   The Low's theorem is applied to the soft gluon emission from heavy quark scattering in quark-gluon plasma (QGP). The QGP is described by the dynamical quasi-particle model (DQPM) which reproduces the EoS from lQCD at finite temperature and chemical potential. We show that if the emitted gluon is soft and of long wavelength, the scattering amplitude can be factorized into the scattering part and the emission part and the Slavnov-Taylor identities are satisfied in the leading order. Imposing a proper upper limit on the emitted gluon energy, we obtain the scattering cross sections of charm quark as well as the transport coefficients (momentum drag and diffusion) in the QGP with and without gluon emission.

   hep-phnucl-thPoS(2024)·0 citations
10. 10*

    Three-meson $\tau$ decays involving kaons and $\eta$ mesons in the NJL model

    M.K. Volkov🇷🇺 · A.A. Pivovarov🇷🇺 · K. Nurlan🇷🇺

    Branching fractions of decays $\tau \to K^0{\pi }^{-}\eta {\nu }_{\tau }$, $\tau \to K^{-}{\pi }^0\eta {\nu }_{\tau }$, $\tau \to K^{-}{K}^0\eta {\nu }_{\tau }$ and $\tau \to K^{-}\eta \eta {\nu }_{\tau }$ are calculated in the $U(3)\times U(3)$ chiral NJL quark model. The contact, vector, axial-vector and pseudoscalar channels are considered. It is shown that the axial vector channel is dominant. The obtained results are in satisfactory agreement with experiment.

    hep-phPRD(2024)·11 citations
11. 11*

    Neutrino Cross Sections: Interface of shallow- and deep-inelastic scattering for collider neutrinos

    Yu Seon Jeong🇰🇷 · Mary Hall Reno🇺🇸

    Neutrino experiments in a Forward Physics Facility at the Large Hadron Collider can measure neutrino and antineutrino cross sections for energies up to a few TeV. For neutrino energies below 100 GeV, the inelastic cross section evaluations have contributions from weak structure functions at low momentum transfers and low hadronic final state invariant mass. To evaluate the size of these contributions to the neutrino cross section, we use a parametrization of the electron-proton structure function, adapted for neutrino scattering, augmented with a correction to account for the partial conservation of the axial vector current, and normalized to structure functions evaluated at next-to-leading order in QCD, with target mass corrections and heavy quark corrections. We compare our results with other approaches to account for this kinematic region in neutrino cross section for energies between 10--1000 GeV on isoscalar nucleon and iron targets.

    hep-phPRD(2023)·24 citations
12. 12*

    Axion dark matter with explicit Peccei-Quinn symmetry breaking in the axiverse

    Hai-Jun Li🇨🇳

    It was shown that the required high quality of the Peccei-Quinn (PQ) symmetry can be a natural outcome of the multiple QCD axions model. In the axiverse, a hypothetical mass mixing between the QCD axions and axion-like particles (ALPs) can occur, which leads to an interesting phenomenon called the level crossing. In this paper, we investigate this mass mixing between one QCD axion and one ALP with the explicit PQ symmetry breaking in the early Universe. The dynamics of the axions and their cosmological evolutions when the level crossing occurs in this scenario are studied in detail. We show the evolution of the mass eigenvalues and the mass mixing angle. Then we check the condition for energy adiabatic transition with the corresponding parameter set. Finally, we estimate the relic density of the QCD axion and ALP dark matter through the misalignment mechanism. We find that, the QCD axion relic density can be suppressed, while the ALP relic density can be enhanced. The level crossing in our scenario may have some cosmological implications, such as the axion domain walls formation, the nano-Hertz gravitational waves emission, and also the primordial black holes formation.

    hep-phastro-ph.COJCAP(2024)·15 citations
13. 13*

    The Strong Field QED approach of the vacuum interaction processes at ELI-NP

    M.Pentia🇷🇴 · C.R.Badita🇷🇴 · D.Dumitriu🇷🇴 · A.R.Ionescu🇷🇴 · H.Petrascu🇷🇴

    The commissioning of the high power laser facility Extreme Light Infrastructure - Nuclear Physics (ELI-NP) at Bucharest-Magurele (Romania) allows the in-depth study of nonlinear interactions in Strong Field Quantum Electrodynamics (SF-QED). The present paper analyzes the SF-QED processes possible to study at ELI-NP. Carrying out such experiments will allow finding answers to many fundamental QED questions. After a brief review of the first experiment (E-144 SLAC) which confirmed the existence of nonlinear QED interactions of high-energy electrons with photons of a laser beam, we presented the fundamental QED processes that can be studied at ELI-NP in the multi-photon regime along with the characteristic parameters of the laser beam used in the QED interaction with electrons. To prepare an experiment at ELI-NP, it is necessary to analyze both the kinematics and the dynamics of the interactions. Therefore, we first reviewed the kinematics of linear QED processes and then the corresponding Feynman diagrams. For nonlinear, non-perturbative multi-photon QED interactions, the Feynman diagram technique must be adapted from linear to nonlinear processes. This is done by switching to quantum fields described by Dirac-Volkov dressed states, of particles in an intense electromagnetic (EM) field. This allows the evaluation of the amplitude of the physical processes and finally the determination of the cross-sections of these processes. SF-QED processes of multi-photon interactions with strong laser fields can be investigated taking into account the characteristics of the ELI-NP facility in the context of QED vacuum pair production of electron-positron pairs and energetic gamma rays. Finally, we present some similar experimental projects from other research centers, in different stages of implementation.

    hep-phquant-ph3 citations
14. 14*

    SMEFT analysis with LHeC, FCC-eh, and EIC DIS pseudodata

    Chiara Bissolotti🇺🇸 · Radja Boughezal🇺🇸 · Kaan Simsek🇺🇸

    In this study, we examine the possibilities opened by upcoming high-energy deep-inelastic scattering (DIS) experiments to investigate new physics within the framework of the Standard Model Effective Field Theory (SMEFT). Specifically, we investigate the beyond-the-Standard-Model (BSM) potential of the Large Hadron-electron Collider (LHeC) and the Future Circular lepton-hadron Collider (FCC-eh), and we improve previous simulations of the Electron-Ion Collider (EIC) by incorporating $Z$-boson vertex corrections. Our fits, performed using DIS pseudodata, reveal that the LHeC and the FCC-eh can play a crucial role in resolving degeneracies observed in the parameter space of Wilson coefficients in global fits using the Higgs, diboson, electroweak, and top data. This emphasizes the significance of precision DIS measurements in advancing our understanding of new physics.

    hep-ph3 citations
15. 15*

    Probing Light Dark Matter through Cosmic-Ray Cooling in Active Galactic Nuclei

    Gonzalo Herrera🇩🇪 · Kohta Murase🇺🇸

    Recent observations of high-energy neutrinos from active galactic nuclei (AGN), NGC 1068 and TXS 0506+056, suggest that cosmic rays (CRs) are accelerated in the vicinity of the central supermassive black hole and high-energy protons and electrons can cool efficiently via interactions with ambient photons and gas. The dark matter density may be significantly enhanced near the central black hole, and CRs could lose energies predominantly due to scatterings with the ambient dark matter particles. We propose CR cooling in AGN as a new probe of dark matter-proton and dark matter-electron scatterings. Under plausible astrophysical assumptions, our constraints on sub-GeV dark matter can be the strongest derived to date. Some of the parameter space favored by thermal light dark matter models might already be probed with current multimessenger observations of AGN.

    hep-phastro-ph.GAastro-ph.HEPRD(2024)·44 citations
16. 16*

    Shedding light on the $\Delta m_{21}^2$ tension with supernova neutrinos

    Rasmi Hajjar🇪🇸 · Sergio Palomares-Ruiz🇪🇸 · Olga Mena🇪🇸

    One long-standing tension in the determination of neutrino parameters is the mismatched value of the solar mass square difference, $\Delta m_{21}^2$, measured by different experiments: the reactor antineutrino experiment KamLAND finds a best fit larger than the one obtained with solar neutrino data. Even if the current tension is mild ($\sim 1.5\sigma$), it is timely to explore if independent measurements could help in either closing or reassessing this issue. In this regard, we explore how a future supernova burst in our galaxy could be used to determine $\Delta m_{21}^2$ at the future Hyper-Kamiokande detector, and how this could contribute to the current situation. We study Earth matter effects for different models of supernova neutrino spectra and supernova orientations. We find that, if supernova neutrino data prefers the KamLAND best fit for $\Delta m_{21}^2$, an uncertainty similar to the current KamLAND one could be achieved. On the contrary, if it prefers the solar neutrino data best fit, the current tension with KamLAND results could grow to a significance larger than $5\sigma$. Furthermore, supernova neutrinos could significantly contribute to reducing the uncertainty on ${\sin }^2{\theta }_{12}$.

    hep-phastro-ph.HEPLB(2024)·6 citations
17. 17*

    Fifth forces from QCD axions scale differently

    Martin Bauer🇬🇧 · Guillaume Rostagni🇬🇧

    We reexamine the low-energy potential for a macroscopic fifth force generated from the exchange of two axions. The shift-symmetry of the linear axion interactions leads to a potential falling off as $V(r)\sim 1/r^5$. We find that in the case of the QCD axion higher-order terms in the Lagrangian break the shift symmetry and lead to the dominant contribution to the potential scaling as $V(r)\sim 1/r^3$. These terms are generated by the same physics responsible for the axion mass and therefore the new contributions to the potential induce a different force for external nucleons and leptons. We demonstrate how this result affects the sensitivity of searches for new long-range forces.

    hep-phPRL(2024)·32 citations
18. 18*

    The manifestly gauge-invariant spectrum of the Minimal Supersymmetric Standard Model

    Axel Maas🇦🇹 · Philipp Schreiner🇦🇹

    Formal field theory requires, even in the presence of a Brout-Englert-Higgs effect, to maintain manifest non-perturbative gauge invariance. The Fröhlich-Morchio-Strocchi mechanism allows nonetheless an augmented perturbative treatment. We perform such an augmented tree-level analysis for the minimal supersymmetric standard model. We find that, as for the standard model, corrections to standard perturbation theory are only sub-leading.

    hep-phAnnals Phys.(2025)·0 citations
19. 19*

    Consequences of Multiple Axions in Theories with Dark Yang-Mills Groups

    Manuel Ettengruber🇩🇪 · Emmanouil Koutsangelas🇩🇪

    General consistency requirements of Quantum Gravity demand the existence of one axion per Yang-Mills group. In this work, we consider theories with dark Yang-Mills sectors and investigate general phenomenological implications of these necessary axions. We carry out computations for two simple models, namely a pure Yang-Mills sector and $N$ exact Standard Model copies. For the former, the misalignment mechanism results in a minimal dark confinement scale ${\Lambda }_{\mathrm{conf}}\gtrsim 1\mathrm{eV}$ if the dark sector axion is supposed to make up the dark matter. For the latter, the misalignment mechanism without fine-tuning of the initial misalignment angle places an upper bound on $N$ below the species bound. When the PQ symmetries are broken during inflation, the collective isocurvature fluctuations do not necessarily tighten the bound on the inflationary Hubble scale arising from a single axion. We also point out that axion stars collectively made from axions of different dark sectors with a suppressed mass spectrum are not possible. Lastly, for the two models at hand, intersector interaction through axion kinetic mixing leads to the existence of two distinct axion states. For a single dark YM sector, the upper bound ${\Lambda }_{\mathrm{conf}}\lesssim 10^{12}\mathrm{GeV}$ emerges from the stability requirement of the dark sector axion. For $N$ exact SM copies, the mass and photon coupling of the second state is completely determined after a potential measurement of the analogous parameters of the first axion.

    hep-phastro-ph.COhep-thPRD(2025)·7 citations
20. 20*

    Sensitivity of finite size effects to the boundary conditions and the vacuum term

    Győző Kovács🇭🇺 · Péter Kovács🇭🇺 · Pok Man Lo🇵🇱 · Krzysztof Redlich🇵🇱 · György Wolf🇭🇺

    Finite volume effects are studied both with low-momentum cutoff and with momentum discretization in the framework of an (axial)vector meson extended quark-meson model with Polyakov-loop variables. In the momentum cutoff scenario, the CEP moves to lower temperatures and larger quark chemical potentials as the characteristic system size is reduced, however, the treatment of the vacuum term significantly affects its trajectory. The size dependence of the baryon fluctuations is also studied by the kurtosis and the skewness, both of which show moderate dependence on temperature and some dependence on quark chemical potential. The order of the phase transition is also studied near the chiral limit at finite system size and found to be second-order only at vanishing explicit breaking. The implementation of the finite size effect with momentum discretization is more complicated and shows peculiar behavior due to the different modes dropping below the Fermi surface and strong dependence on the type of the boundary condition chosen. We found that both the different boundary conditions and the treatment of the vacuum term cause significant changes in the trajectory of the CEP as the characteristic system size is changed.

    hep-phnucl-thPRD(2023)·12 citations
21. 21*

    Enhanced Early Galaxy Formation in JWST from Axion Dark Matter?

    Simeon Bird🇺🇸 · Chia-Feng Chang🇺🇸 · Yanou Cui🇺🇸 · Daneng Yang🇺🇸

    We demonstrate that enhanced early galaxy formation can generically arise in axion-like particle (ALP) dark matter (DM) models with a delayed onset of axion field oscillation. In these models, the formation of localized massive objects enhances structure formation, potentially addressing the excess recently observed by the James Webb Space Telescope (JWST), while remaining consistent with existing constraints. We identify viable parameter space with the ALP mass in the range of $10^{-22}\mathrm{eV}<m_a<10^{-19}\mathrm{eV}$. In addition, we show that the ALP parameter regions of interest can lead to intriguing complementary signatures in the small-scale structure of DM halos and existing experimental searches for ALPs.

    hep-phastro-ph.COastro-ph.HEhep-thPLB(2024)·26 citations
22. 22*

    Red Supergiant Candidates for Multimessenger Monitoring of the Next Galactic Supernova

    Sarah Healy · Shunsaku Horiuchi🇺🇸 · Marta Colomer Molla🇧🇪 · Dan Milisavljevic · Jeff Tseng · Faith Bergin · Kathryn Weil🇺🇸 · Masaomi Tanaka

    We compile a catalog of 578 highly probable and 62 likely red supergiants (RSGs) of the Milky Way, which represents the largest list of Galactic RSG candidates designed for continuous follow-up to date. We match distances measured by Gaia DR3, 2MASS photometry, and a 3D Galactic dust map to obtain luminous bright late-type stars. Determining the stars' bolometric luminosities and effective temperatures, we compare to Geneva stellar evolution tracks to determine likely RSG candidates, and quantify contamination using a catalog of Galactic AGB in the same luminosity-temperature space. We add details for common or interesting characteristics of RSG, such as multi-star system membership, variability, and classification as a runaway. As potential future core-collapse supernova (SN) progenitors, we study the ability of the catalog to inform the Supernova Early Warning System (SNEWS) coincidence network made to automate pointing, and show that for 3D position estimates made possible by neutrinos, the number of progenitor candidates can be significantly reduced, improving our ability to observe the progenitor pre-explosion and the early phases of the core-collapse supernova.

    ↳ astro-ph.SRastro-ph.GAhep-phMNRAS(2024)·17 citations
23. 23*

    Computing Jet Transport Coefficients On The Lattice

    Amit Kumar🇨🇦 · Abhijit Majumder🇺🇸 · Ismail Soudi🇺🇸 · Johannes H. Weber🇩🇪

    The leading jet transport coefficients $\hat{q}$ or ${\hat{e}}_2$ encode transverse or longitudinal momentum broadening of a hard parton traversing a hot medium. Understanding their temperature dependence is key to appreciating the observed suppression of high-transverse momentum probes at RHIC or LHC collision energies. We present a first continuum extrapolated result of $\hat{q}$ computed on pure SU(3) lattices with non-trivial temperature dependence different from the weak-coupling expectation. We discuss our formalism and its challenges and status in view of obtaining ${\hat{e}}_2$ or of unquenching the calculation. We consider a hard quark subject to a single scattering on the plasma. The transport coefficients are factorized in terms of matrix elements given as integrals of non-local gauge-covariant gluon field-strength field-strength correlators. After the analytic continuation to the deep-Euclidean region, the hard scale permits to recast these as a series of local, gauge-invariant operators. The renormalized leading-twist term in this expansion is closely related to static quantities, and is computed on pure SU(3) lattices ($N_{\tau }=4,6,8,$ and $10$) for a wide range of temperatures, ranging from 200MeV < T < 1GeV. Our estimate for the unquenched result in $2+1$-flavor QCD has very similar features.

    ↳ hep-lathep-phnucl-exnucl-thPoS(2023)·1 citation
24. 24*

    Effects of Symmetry Energy on the Equation of State for Hybrid Neutron Stars

    Parada T. P. Hutauruk🇰🇷 · Hana Gil🇰🇷 · Seung-il Nam🇰🇷 · Chang Ho Hyun🇰🇷

    In this paper, the implications of the symmetry energy on the hadron and quark phase transitions in the compact star, including the properties of the possible configurations of the quark-hadron hybrid stars, are investigated in the frameworks of the energy-density functional (EDF) models and the flavor SU(2) Nambu--Jona-Lasinio (NJL) model with the help of the Schwinger's covariant proper-time regularization (PTR) scheme. In this {theoretical setup}, the equations of states (EoSs) of hadronic matter for various values of symmetry energies obtained from the EDF models are employed to describe the hadronic matter, and the {flavor} SU(2) NJL model with various repulsive-vector interaction strengths are used to describe the quark matter. We then observe the obtained EoS in the mass-radius properties of the hybrid star configurations for various vector interactions and nuclear symmetry energies by solving the Tolman-Oppenheimer-Volkoff equation. We obtain that the critical density at which the phase transition occurs varies over the density (3.6--6.7)${\rho }_0$ depending on the symmetry energy and the strength of the vector coupling $G_v$. The maximum mass of the neutron star (NS) is susceptible to $G_v$. When there is no repulsive force, the NS maximum mass is only about $1.5M_{\odot }$, but it becomes larger than $2.0M_{\odot }$ when the vector coupling constant is about half of the {attractive} scalar coupling constant. Surprisingly, the presence of the quark matter does not affect the canonical mass of NS ($1.4M_{\odot }$), so observing the canonical mass of NSs can provide unique constraints to the EoS of hadronic matter at high densities.

    ↳ nucl-thastro-ph.HEhep-phJ.Korean Phys.Soc.(2024)·6 citations
25. 25*

    Drag force near the QCD critical point

    Yukinao Akamatsu🇯🇵 · Masayuki Asakawa🇯🇵

    We discuss how heavy quark dynamics is affected by the critical fluctuations near the QCD critical point at finite temperature and density. We find that the heavy quark momentum diffusion constant scales as $\kappa \propto {\xi }^{z-3-\eta }$. In the model H scenario, which is widely accepted for the critical dynamics, the exponents are known as $z\simeq 3,\eta \sim 0.04$ and the critical singularity of $\kappa$ is not significant if any. In the model B scenario, $z\simeq 4$ and $\kappa \propto \xi$ is singular near the critical point.

    ↳ nucl-thcond-mat.quant-gashep-phnucl-exPRC(2024)·1 citation
26. 26*

    Hunting for bumps in the diffuse high-energy neutrino flux

    Damiano F. G. Fiorillo🇩🇰 · Mauricio Bustamante🇩🇰

    The origin of the TeV--PeV astrophysical neutrinos seen by the IceCube telescope is unknown. If they are made in proton-photon interactions in astrophysical sources, their spectrum may show bump-like features. We search for such features in the 7.5-years High-Energy Starting Events (HESE), and forecast the power of such searches using larger data samples expected from upcoming telescopes. Present-day data reveals no evidence of bump-like features, which allows us to constrain candidate populations of photohadronic neutrino sources. Near-future forecasts show promising potential for stringent constraints or decisive discovery of bump-like features. Our results provide new insight into the origins of high-energy astrophysical neutrinos, complementing those from point-source searches.

    ↳ astro-ph.HEhep-ph0 citations
27. 27*

    Sensitivity of Space-based Gravitational-Wave Interferometers to Ultralight Bosonic Fields and Dark Matter

    Jiang-Chuan Yu🇨🇳 · Yue-Hui Yao🇨🇳 · Yong Tang🇨🇳 · Yue-Liang Wu🇨🇳

    Ultralight bosonic fields (ULBFs) are predicted by various theories beyond the standard model of particle physics and are viable candidates of cold dark matter. There have been increasing interests to search for the ULBFs in physical and astronomical experiments. In this paper, we investigate the sensitivity of several planned space-based gravitational-wave interferometers to ultralight scalar and vector fields. Using time-delay interferometry (TDI) to suppress the overwhelming laser frequency noise, we derive the averaged transfer functions of different TDI combinations to scalar and vector fields, and estimate the impacts of bosonic field's velocities. We obtain the sensitivity curves for LISA, Taiji and TianQin, and explore their projected constraints on the couplings between ULBFs and standard model particles, illustrating with the ULBFs as dark matter.

    ↳ gr-qcastro-ph.COhep-phPRD(2023)·32 citations
28. 28*

    Relic Gravitational Waves from the Chiral Plasma Instability in the Standard Cosmological Model

    Axel Brandenburg🇸🇪 · Emma Clarke🇺🇸 · Tina Kahniashvili🇺🇸 · Andrew J. Long🇺🇸 · Guotong Sun🇺🇸

    In the primordial plasma, at temperatures above the scale of electroweak symmetry breaking, the presence of chiral asymmetries is expected to induce the development of helical hypermagnetic fields through the phenomenon of chiral plasma instability. It results in magnetohydrodynamic turbulence due to the high conductivity and low viscosity and sources gravitational waves that survive in the universe today as a stochastic polarized gravitational wave background. In this article, we show that this scenario only relies on Standard Model physics, and therefore the observable signatures, namely the relic magnetic field and gravitational background, are linked to a single parameter controlling the initial chiral asymmetry. We estimate the magnetic field and gravitational wave spectra, and validate these estimates with 3D numerical simulations.

    ↳ astro-ph.COgr-qchep-phPRD(2024)·9 citations
29. 29*

    The Classical Equations of Motion of Quantized Gauge Theories, Part 2: Electromagnetism

    David E. Kaplan🇺🇸 · Tom Melia🇯🇵 · Surjeet Rajendran🇺🇸

    In this and companion papers, we show that quantum field theories with gauge symmetries permit a broader class of classical dynamics than typically assumed. In this article, we show that the quantization of electromagnetism permits the existence of classical electric field states that do not obey Gauss's law. These states are gauge invariant and their time evolution can be consistently described using the Schrödinger equation. The time evolution of these states is such that at the classical level, the full set of Maxwell's equations would appear to hold, with the physical effects of these states being attributable to an auxiliary, static ``shadow'' charge density with no internal degrees of freedom. This density could affect the dynamics of charged particles in our universe and it may thus be of observational interest.

    ↳ hep-thhep-phPLB(2025)·12 citations
30. 30*

    Statistics of magnification for extremely lensed high redshift stars

    J. M. Palencia🇪🇸 · J. M. Diego🇪🇸 · B. J. Kavanagh🇪🇸 · J. Martinez

    Microlensing of stars in strongly lensed galaxies can lead to temporary extreme magnification factors ($\mu >1000$), enabling their detection at high redshifts. Following the discovery of Icarus, several stars at cosmological distances ($z>1$) have been observed using the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). This emerging field of gravitational lensing holds promise to study individual high redshift stars. Also offers the opportunity to study the substructure in the lens plane with implications for dark matter models, as more lensed stars are detected and analysed statistically. Due to the computational demands of simulating microlensing at large magnification factors, it is important to develop fast and accurate analytical approximations for the probability of magnification in such extreme scenarios. In this study, we consider different macro-model magnification and microlensing surface mass density scenarios and study how the probability of extreme magnification factors depends on these factors. To achieve this, we create state of the art large simulations of the microlensing effect in these scenarios. Through the analysis of these simulations, we derive analytical scaling relationships that can bypass the need for expensive numerical simulations. Our results are useful to interpret current observations of stars at cosmic distances which are extremely magnified and under the influence of microlenses.

    ↳ astro-ph.COastro-ph.GAhep-phAstron.Astrophys.(2024)·19 citations
31. 31*

    Alternative scenarios for the LHC based electron-proton collider

    A. N. Akay🇹🇷 · B. Dagli🇹🇷 · B. Ketenoglu🇹🇷 · A. Ozturk🇹🇷 · S. Sultansoy🇹🇷

    Construction of the ERLC (twin LC) collider tangential to LHC will give opportunity to investigate ep collisions at essentially higher center-of-mass energies than ERL50 and LHC based ep collider. Luminosity estimations show that values well exceeding 10^{34} cm^{-2}s^{-1} can be achieved for ERLC and HL-LHC based ep colliders. Certainly, proposed ep colliders have great potential for clarifying QCD basics and new physics search in addition to providing precise PDFs for adequate interpretation of LHC experimental data. Another alternative to the ERL50 is to construct an e-ring with the same energy and length. In this case, 4.2x10^{33} cm^{-2}s^{-1} luminosity can be reached. The advantage of this option is that the {\mu}-ring can be installed instead of the e-ring as a next stage, which will allow it to reach a much higher center of mass energy.

    ↳ physics.acc-phhep-exhep-phTurk.J.Phys.(2024)·1 citation

* 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.