Fri·Dec 8, 2023Friday·December 8, 2023

1. 01*

   Vector-Like Fermions and Inert Scalar Solutions to the Muon g-2 Anomaly and collider probes at the HL-LHC and FCC-hh

   Á. S. de Jesus🇧🇷 · F. S. Queiroz🇧🇷 · J. W. F. Valle🇪🇸 · Y. Villamizar🇧🇷

   We examine simple models with an inert scalar and vector-like leptons that can explain the recent $g_{\mu }-2$ measurement reported at FNAL. Prompted by this exciting result, we explore the viability of a simple interpretation and determine the required parameters. We also embed these models within a 3-3-1 gauge extension of the Standard Model (SM), showing that the $g_{\mu }-2$ anomaly can be accommodated in agreement with current data. We also show how our theory can be tested at high-energy colliders such as HL-LHC and FCC-hh.

   hep-ph7 citations
2. 02*

   Exploring correlations between HEFT Higgs couplings ${\kappa }_V$ and ${\kappa }_{2V}$ via HH production at $e^{+}{e}^{-}$ colliders

   J.M. Dávila🇪🇸 · D. Domenech🇪🇸 · M. J. Herrero🇪🇸 · R. A. Morales🇦🇷

   In this work we explore the phenomenological implications at future $e^{+}{e}^{-}$ colliders of assuming anomalous couplings of the Higgs boson to gauge bosons $HVV$ and $HHVV$ ($V=W,Z$) given by the $\kappa$-modifiers with respect to the Standard Model couplings, ${\kappa }_V$ and ${\kappa }_{2V}$, respectively. For this study we use the Higgs Effective Field Theory (HEFT) where these two $\kappa$ parameters are identified with the two most relevant effective couplings at leading order, concretely $a={\kappa }_V$ and $b={\kappa }_{2V}$. Our focus is put on these two couplings and their potential correlations which we believe carry interesting information on the underlying ultraviolet theory. The particular studied process is $e^{+}{e}^{-}\to HH\nu \bar{\nu }$, where the vector boson scattering subprocess $WW\to HH$ plays a central role, specially at the largest planned energy colliders. Our detailed study of this process as a function of the energy and the angular variables indicates that the produced Higgs bosons in the BSM scenarios will have in general a high transversality as compared to the SM case if ${\kappa }_V^2\ne {\kappa }_{2V}$. In order to enhance the sensitivity to these HEFT parameters ${\kappa }_V$ and ${\kappa }_{2V}$ and their potential correlations we propose here some selected differential cross sections for the $e^{+}{e}^{-}\to HH\nu \bar{\nu }$ process where different kinematic properties of the BSM case with respect to the SM are manifested. Finally, we will focus on the dominant Higgs decays to $b\bar{b}$ pairs leading to final events with 4 $b$-jets and missing transverse energy from the undetected neutrinos and will provide the expected accessibility to the $({\kappa }_V,{\kappa }_{2V})$ effective couplings and their potential correlations. In our study we will consider the three projected energies for $e^{+}{e}^{-}$ colliders of 500 GeV, 1000 GeV and 3000 GeV.

   hep-phEPJC(2024)·12 citations
3. 03*

   The Gailitis-Damburg oscillations in the three-body $e^{-}{e}^{+}\bar{p}$ system

   V.A. Gradusov🇷🇺 · S.L. Yakovlev🇷🇺

   We study the near threshold behavior of cross sections of low-energy antiproton scattering off the ground and excited states of positronium with zero total orbital momentum $L=0$. In our computational experiment, the existence of singularities called the Gailitis-Damburg oscillations above the thresholds of excited states of positronium and antihydrogen atoms is confirmed. In the future the obtained results can be useful for developing proposals for improving the conditions of experiments with antimatter.

   hep-phphysics.atom-phJETP Lett.(2024)·1 citation
4. 04*

   Constraints on axion-like ultralight dark matter from observations of the HL Tauri protoplanetary disk

   D. Davydov🇷🇺 · Alexander Libanov🇷🇺

   Dark matter may consist of axion-like particles (ALPs). When polarized electromagnetic radiation passes through the dark-matter media, interaction with background ALPs affects the polarization of photons. The condensate of axionic dark matter experiences periodic oscillations, and the period of the oscillations is of order of years for ultra-light dark matter. This would result in observable periodic changes in the polarization plane, determined by the phases of the ALP field at the Earth and at the source. In this paper, we use recent polarimetric observations of the HL Tauri protoplanetary disk performed in different years to demonstrate the lack of changes of polarization angles, and hence to constrain masses and photon couplings of the hypothetical axion-like ultralight dark matter.

   hep-phastro-ph.COPRD(2024)·2 citations
5. 05*

   Oscillations of Ultralight Dark Photon into Gravitational Waves

   Wei Chao🇨🇳 · Jing-jing Feng🇨🇳 · Huai-ke Guo🇨🇳 · Tong Li🇨🇳

   The discovery of gravitational waves (GWs) opens a new window for exploring the physics of the early universe. Identifying the source of GWs and their spectra today turn out to be the important tasks so as to assist the experimental detection of stochastic GWs. In this paper, we investigate the oscillations of the ultralight dark photon (ULDP) into GWs in the dark halo. Assuming dark matter is composed of the ULDP and there are primordial dark magnetic fields (PDMFs) arising from the axion inflation and/or the dark phase transition, then the ULDP can oscillate into the GW when it passes through an environment of PDMFs. We derive the local energy density of GWs in the galaxy cluster induced by the instaneous oscillation of ULDP in the PDMFs. These stochastic local GWs exhibit a pulse-like spectrum, with frequency depending on the mass of the ULDP, and can be detected in Pulsar Timing Arrays (PTAs) or future space-based interferometers. We also find that the low-frequency GW signal observed by the NANOGrav collaboration and other PTA experiments can be explained by the oscillation of the ULDP in the PDMFs in the early universe.

   hep-phastro-ph.HEgr-qcNPB(2024)·6 citations
6. 06*

   Spin-flip gluon GTMD $F_{1,2}$ at small-$x$

   Sanskriti Agrawal🇮🇳 · Nahid Vasim🇮🇳 · Raktim Abir🇮🇳

   Until recently the spin-flip processes in the deep inelastic scatterings are thought to be suppressed in the high energy. We found a positive intercept for the spin-flip generalized transverse momentum-dependent parton distribution (GTMDs) $\mathrm{Re}(F_{1,2})$ as, \begin{eqnarray} {\rm Re}(F_{1,2}) \sim \left(\frac{1}{x}\right)^{{\bar \alpha}_s\left(4\ln2-8/3\right)} \left(\cos 3\phi_{k\Delta} +\cos \phi_{k\Delta}\right). \nonumber \end{eqnarray} This is done by analytically solving the integro-differential evolution equation for $\mathrm{Re}(F_{1,2})$, recently proposed by Hatta and Zhou, in the dilute regime. Interestingly, the surviving solution corresponds to conformal spin $n=2$ and carries an explicit $\cos 3{\varphi }_{k\Delta }+\cos {\varphi }_{k\Delta }$ azimuthal dependence. As the imaginary part of $F_{1,2}$, is related to the spin-dependent odderon or gluon Siver function and scales as $\mathrm{Im}(F_{1,2})\sim x^0$, the positive intercept for $\mathrm{Re}(F_{1,2})$, implies that it is expected to dominate over the gluon Siver function in the small-$x$ limit - and may directly impact the modeling of unpolarised GTMDs and associated spin-flip processes.

   hep-phhep-latnucl-thPRD(2024)·9 citations
7. 07*

   Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production

   Heikki Mäntysaari🇫🇮 · Farid Salazar🇺🇸 · Björn Schenke🇺🇸

   We calculate the exclusive $\mathrm{J}/\psi$ photoproduction cross section at high energies from the Color Glass Condensate approach. The results are compared to the center-of-mass energy dependent $\gamma +A\to \mathrm{J}/\psi +A$ cross sections extracted from measurements in ultra peripheral heavy ion collisions at RHIC and LHC. We predict strong saturation-driven nuclear suppression at high energies, while LHC data prefers even stronger suppression. We explore the effect of nucleon shape fluctuations on the nuclear suppression in the coherent and incoherent cross sections, and show that the most recent measurement of the $|t|$-differential incoherent $\mathrm{J}/\psi$ cross section prefers large event-by-event fluctuations of the nucleon substructure in heavy nuclei, comparable to that found for a free proton.

   hep-phnucl-thPRD(2024)·39 citations
8. 08*

   Nonlinear Corrections to the Momentum Sum Rule

   G.R.Boroun🇮🇷

   The importance of the nonlinear corrections on the momentum sum rule is investigated on the initial scale $Q_0^2$. Nonlinear corrections are found to play an indispensable role in the singlet and gluon momentum sum rule in the high-order approximations in the parameterization groups for nucleons and light nuclei at low $x$ in future colliders. In this way, we obtain a significantly different low $x$ behavior of the singlet and gluon momentum sum rule at the hotspot point.

   hep-phEPJA(2024)·3 citations
9. 09*

   Establishing the Range of Applicability of Hydrodynamics in High-Energy Collisions

   Clemens Werthmann🇩🇪 · Victor E. Ambruş🇷🇴 · Sören Schlichting🇩🇪

   We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics. We find that hydrodynamics provides a quantitatively accurate description of collective flow when the average inverse Reynolds number is sufficiently small and the early pre-equilibrium stage is properly accounted for. By determining the breakdown of hydrodynamics as a function of system size and energy, we find that it is quantitatively accurate in central lead-lead collisions at LHC energies, but should not be used in typical proton-lead or proton-proton collisions, where the development of collective flow cannot accurately be described within hydrodynamics.

   hep-phEPJ Web Conf.(2024)·1 citation
10. 10*

    Clothed particle representation in quantum field theory: Fermion mass renormalization due to vector boson exchange

    Yan Kostylenko · Aleksandr Shebeko

    We consider the fermion mass renormalization due to the vector boson exchange within mesodynamics with nucleon and $\rho$ meson fields as well as quantum electrodynamics with electron and photon fields. The method of unitary clothing transformations is used to handle the so-called clothed particle representation that allows us to get rid of mass counterterms directly in the Hamiltonian. Thus, they can no longer appear in the S-matrix. Special attention is paid to the cancellation of the so-called contact terms that are inevitable in models with vector bosons. Within this formalism, the second-order mass shifts are derived. They are expressed through the corresponding three-dimensional integrals whose integrands depend on certain covariant combinations of the relevant three-momenta. Our results are proved to be particle-momentum independent and compared with ones obtained by Feynman techniques.

    hep-phhep-thPRD(2023)·1 citation
11. 11*

    The neutrino fog for dark matter-electron scattering experiments

    Ben Carew🇦🇺 · Ashlee R. Caddell🇦🇺 · Tarak Nath Maity🇮🇳 · Ciaran A. J. O'Hare🇦🇺

    The search for sub-GeV dark matter via scattering on electrons has ramped up in the last few years. Like in the case of dark matter scattering on nuclei, electron-recoil-based searches also face an ultimate background in the form of neutrinos. The so-called ``neutrino fog'' refers to the range of open dark-matter parameter space where the background of neutrinos can potentially prevent a conclusive discovery claim of a dark matter signal from being made. In this study, we map the neutrino fog for a range of electron recoil experiments based on silicon, germanium, xenon and argon targets. In analogy to the nuclear recoil case, we also calculate the ''edge'' to the neutrino fog, which can be used as a visual guide to where neutrinos become an important background -- this boundary excludes some parts of the key theory milestones used to motivate these experiments.

    hep-phastro-ph.COastro-ph.SRhep-exPRD(2024)·43 citations
12. 12*

    Refined analysis of ${\Omega }^{-}{\bar{\Omega }}^{+}$ polarization in electron-positron annihilation process

    Zhe Zhang🇨🇳 · Jiao Jiao Song🇨🇳 · Ya-jin Zhou🇨🇳

    We investigate the production of spin-3/2 hyperon pairs, ${\Omega }^{-}{\bar{\Omega }}^{+}$, in electron-positron annihilation within the helicity amplitude formalism. A refined selection of helicity basis matrices is proposed to relate polarization expansion coefficients and spin density matrix elements and to illuminate their inherent physical interpretations and symmetrical properties. With a novel parametrization scheme of helicity amplitudes, we perform an analysis of polarization correlation coefficients for double-tag ${\Omega }^{-}{\bar{\Omega }}^{+}$ pairs. We present three sets of expressions to describe the decay of ${\Omega }^{-}$ hyperons, and further address the existing tension in the measurements of its decay parameters, particularly ${\varphi }_{\Omega }$. The method and the framework developed in this paper can also be applied to studies of the production and decay mechanisms of other spin-3/2 particles.

    hep-phPRD(2024)·12 citations
13. 13*

    Cosmological domain walls from the breaking of ${\mathbf{S}}_4$ flavor symmetry

    Adil Jueid🇰🇷 · Mohamed Amin Loualidi🇦🇪 · Salah Nasri🇦🇪 · Mohamed Amine Ouahid🇲🇦

    In this work, we delve into the often-overlooked cosmological implications of spontaneous breaking of non-Abelian discrete groups, specifically focusing on the formation of domain walls in the case of $S_4$ flavor symmetry. In particular, we investigate three interesting breaking patterns of the $S_4$ group and study the structure of the domain walls in the broken phase for three possible residual symmetries. The presentation of domain walls in the case of multiple vacua is usually complicated, which therefore implies that most of the analyzes only approximate their presentation. Here, we propose a subtle way to represent the $S_4$ domain wall networks by presenting the vacua in each breaking pattern as vectors with their components corresponding to their coordinates in the flavon space. Then, through the properties of the obtained vectors, we find that the domain wall networks can be represented by Platonic or Archimedean solids where the vertices represent the degenerate vacua while the edges correspond to the domain walls that separate them. As an illustration, we propose a type-II seesaw model that is based on the $S_4$ flavor symmetry, and study its phenomenological implications on the neutrino sector. To solve the domain wall problem within this toy model, we consider an approach based on high-dimensional effective operators induced by gravity that explicitly break the structure of the induced vacua favoring one vacuum over the others.

    hep-phPRD(2024)·11 citations
14. 14*

    Revisiting inclusive production of J/psi and Upsilon in high-energy gamma-gamma collisions

    Yelyzaveta Yedelkina🇫🇷 · Jean-Philippe Lansberg🇫🇷 · Maxim Nefedov🇫🇷

    The impact of Next-to-Leading Order (NLO) QCD corrections to the differential distributions of J/psi and Upsilon mesons produced inclusively in gamma-gamma collisions is discussed for the kinematical conditions of LEP II for DELPHI and at the future Circular Electron-Positron Collider (CEPC). We take into account all sizeable contributions at LO in v^2 in NRQCD factorisation: 1) pure QED process gamma + gamma -> J/psi(3S^1_1) + \gamma up to alpha^3 alpha_s, 2) single-resolved-photon contributions up to alpha_s^4, 3) gamma+gamma -> J/psi + c c-bar up to alpha^2 alpha_s and 4) gamma+gamma -> J/psi + ggg up to alpha^2 alpha_s^3. We will also discuss the pure QED process as a contribution to the exclusive production in ultra-peripheral heavy-ion collisions (UPC) at the LHC.

    hep-phhep-exnucl-exnucl-thPoS(2024)·2 citations
15. 15*

    Investigation of the analog of the $P_c$ states-the doubly charmed molecular pentaquarks

    Xuejie Liu🇨🇳 · Yue Tan🇨🇳 · Xiaoyun Chen🇨🇳 · Dianyong Chen🇨🇳 · Hongxia Huang🇨🇳 · Jialun Ping🇨🇳

    Motivated by the LHCb Collaboration's observation of a doubly charmed tetraquark state $T_{cc}(3875)$, we systematically investigate the existence of doubly charmed pentaquark states using the resonating group method based on the QDCSM framework. The effective potential of the two involved hadrons and the bound state dynamics are included in the present work. Moreover, we have also calculated the scattering phase shifts of open channels by channel coupling to look for possible resonance states. Our estimations indicate that there is a bound state in $I(J^P)=\frac{3}{2}({\frac{5}{2}}^{-})$, with a mass of $4461.7$ MeV. Additionally, five resonance states can be obtained by coupling the open channel, which are ${\Xi }_{cc}\rho$ and ${\Sigma }_c{D}^{\ast }$ with $I(J^P)=\frac{1}{2}({\frac{1}{2}}^{-})$, ${\Lambda }_c{D}^{\ast }$ and ${\Sigma }_c{D}^{\ast }$ with $I(J^P)=\frac{1}{2}({\frac{3}{2}}^{-})$ and ${\Sigma }_c{D}^{\ast }$ with $I(J^P)=\frac{3}{2}({\frac{1}{2}}^{-})$respectively. The existence of these predicted doubly charmed pentaquark states needs to be supported by experimental measurements and discoveries. We hope that some experiments can find evidence of these states.

    hep-phnucl-thPRC(2026)·14 citations
16. 16*

    Resonant leptogenesis in minimal inverse seesaw ISS(2,2) model

    Bikash Thapa🇮🇳 · Ng. K. Francis🇮🇳

    We investigate the parameter space of the minimal inverse seesaw ISS(2,2) model for successful leptogenesis. The framework of ISS(2, 2) is realized by augmenting the Standard Model with two right-handed and two Standard Model singlet neutrinos. The decay of the heavy sterile states which is essentially an admixture of the right-handed and SM singlet neutrino states produces the baryon asymmetry of the universe. In this predictive model of leptogenesis, we study resonant leptogenesis where the mass splitting between the heavy sterile states is naturally achieved. We review the possibility of generating the observed baryon asymmetry of the universe via leptogenesis where the CP violation comes solely from the low-energy CP phases. In addition, we study the effect of texture zero in the Dirac mass matrix on the parameter space of the model for successful resonant leptogenesis.

    hep-ph0 citations
17. 17*

    False vacuum decay rates, more precisely

    Wen-Yuan Ai🇬🇧 · Jean Alexandre🇬🇧 · Sarben Sarkar🇬🇧

    We develop a method for accurately calculating vacuum decay rates beyond the thin-wall regime in a pure scalar field theory at the one-loop level of the effective action. It accounts for radiative effects resulting from quantum corrections to the classical bounce, including gradient effects stemming from the inhomogeneity of the bounce background. To achieve this, it is necessary to compute not only the functional determinant of the fluctuation operator in the background of the classical bounce but also its functional derivative evaluated at the classical bounce. The former is efficiently calculated using the Gel'fand-Yaglom method. We illustrate how the latter can also be calculated with the same method, combined with a computation of various Green's functions.

    hep-phastro-ph.COhep-thPRD(2024)·22 citations
18. 18*

    Incoherent diffractive dijet production and gluon Bose enhancement in the nuclear wave function

    Tiyasa Kar🇺🇸 · Alexander Kovner🇺🇸 · Ming Li🇺🇸 · Vladimir V. Skokov🇺🇸

    We investigate the effect of gluon Bose enhancement in the nuclear wave function on the dijet production in incoherent diffractive processes in DIS and ultraperipheral collisions. We demonstrate that Bose enhancement leads to an enhancement of diffractive dijet production cross section when the transverse momenta of the two jets are aligned at zero relative angle. This enhancement is maximal when the magnitude of the transverse momenta of the two jets are equal, and disappears rather quickly as a function of the ratio of the two momenta. We study both the dilute limit and fully nonlinear dense regime where the nuclear wave function is evolved with the leading order JIMWLK equation. In both cases we observe a visible effect, with it being enhanced by the evolution due to the dynamical generation of the color neutralization scale.

    hep-phnucl-thJHEP(2024)·6 citations
19. 19*

    Phase Transitions and Gravitational Waves in a Model of ${\mathbb{Z}}_3$ Scalar Dark Matter

    Nico Benincasa🇪🇪 · Andrzej Hryczuk🇵🇱 · Kristjan Kannike🇪🇪 · Maxim Laletin🇵🇱

    Theories with more than one scalar field often exhibit phase transitions producing potentially detectable gravitational wave (GW) signal. In this work we study the semi-annihilating ${\mathbb{Z}}_3$ dark matter model, whose dark sector comprises an inert doublet and a complex singlet, and assess its prospects in future GW detectors. Without imposing limits from requirement of providing a viable dark matter candidate, i.e. taking into account only other experimental and theoretical constraints, we find that the first order phase transition in this model can be strong enough to lead to a detectable signal. However, direct detection and the dark matter thermal relic density constraint calculated with the state-of-the-art method including the impact of early kinetic decoupling, very strongly limit the parameter space of the model explaining all of dark matter and providing observable GW peak amplitude. Extending the analysis to underabundant dark matter thus reveals region with detectable GWs from a single-step or multi-step phase transition.

    hep-phastro-ph.COJHEP(2024)·12 citations
20. 20*

    Pulsar Timing Arrays and Primordial Black Holes from a Supercooled Phase Transition

    Alberto Salvio🇮🇹

    An explicit realistic model featuring a supercooled phase transition, which allows us to explain the background of gravitational waves recently detected by pulsar timing arrays, is constructed. In this model the phase transition corresponds to radiative symmetry breaking (and mass generation) in a dark sector featuring a dark photon associated with the broken symmetry. The completion of the transition is ensured by a non-minimal coupling between gravity and the order parameter and fast reheating occurs thanks to a preheating phase. Finally, it is also shown that the model leads to primordial black hole production.

    hep-phastro-ph.COastro-ph.HEgr-qc+1PLB(2024)·45 citations
21. 21*

    Revisiting the cosmic string origin of GW190521

    Josu C. Aurrekoetxea🇬🇧 · Charlie Hoy🇬🇧 · Mark Hannam🇬🇧

    For the first time we analyse gravitational-wave strain data using waveforms constructed from strong gravity simulations of cosmic string loops collapsing to Schwarzschild black holes; a previously unconsidered source. Since the expected signal is dominated by a black-hole ringdown, it can mimic the observed gravitational waves from high-mass binary black hole mergers. To illustrate this, we consider GW190521, a short duration gravitational-wave event observed in the third LIGO--Virgo--KAGRA observing run. We show that describing this event as a collapsing cosmic string loop is favoured over previous cosmic string analyses by an approximate log Bayes factor of $22$. The binary black hole hypothesis is still preferred, mostly because the cosmic string remnant is non-spinning. It remains an open question whether a spinning remnant could form from loops with angular momentum, but if possible, it would likely bring into contention the binary black hole preference. Finally, we suggest that searches for ringdown-only waveforms would be a viable approach for identifying collapsing cosmic string events and estimating their event rate. This work opens up an important new direction for the cosmic-string and gravitational-wave communities.

    ↳ gr-qcastro-ph.COastro-ph.HEhep-phPRL(2024)·18 citations
22. 22*

    Stochastic gravitational wave background detection using NANOGrav 15-year data set in the context of massive gravity

    Chris Choi🇺🇸 · Jacob Magallanes🇵🇭 · Murman Gurgenidze🇺🇸 · Tina Kahniashvili🇺🇸

    Convincing evidence of a stochastic gravitational wave (GW) background has been found by the NANOGrav Collaboration in the 15-year data set. From this signal, we can evaluate the possibility of its source being from the early Universe through the tensor perturbations induced by a massive spin-2 graviton field. We consider a time-dependent model of the minimal theory of massive gravity and find values of the graviton mass, mass cutoff time, and Hubble rate of inflation that amplify the energy spectra of primordial GWs sufficiently to reproduce the signal from the NANOGrav data within 1-3 standard deviation. However, a suppression mechanism for high-frequency modes must be introduced to conservatively obey the big bang nucleosynthesis (BBN) bound. While there are regions of the parameter space that reproduce the signal, it remains a challenge to simultaneously respect the BBN and cosmic microwave background bounds without making the graviton mass cutoff time too deep into the matter-dominated era.

    ↳ astro-ph.COgr-qchep-phPRD(2024)·10 citations
23. 23*

    Probing levitodynamics with multi-stochastic forces and the simple applications on the dark matter detection in optical levitation experiment

    Xi Cheng🇨🇳 · Ji-Heng Guo🇨🇳 · Wenyu Wang🇨🇳 · Bin Zhu🇨🇳

    If the terrestrial environment is permeated by dark matter, the levitation experiences damping forces and fluctuations attributed to dark matter. This paper investigates levitodynamics with multiple stochastic forces, including thermal drag, photon recoil, feedback, etc., assuming that all of these forces adhere to the fluctuation-dissipation theorem. The ratio of total damping to the stochastic damping coefficient distinguishes the levitodynamics from cases involving only one single stochastic force. The heating and cooling processes are formulated to determine the limits of temperature change. All sources of stochastic forces are comprehensively examined, revealing that dark matter collisions cannot be treated analogously to fluid dynamics. Additionally, a meticulous analysis is presented, elucidating the intricate relationship between the fundamental transfer cross-section and the macroscopic transfer cross-section. While the dark damping coefficient is suppressed by the mass of the levitated particle, scattering can be coherently enhanced based on the scale of the component microscopic particle, the atomic form factor, and the static structure factor. Hence, dark damping holds the potential to provide valuable insights into the detection of the macroscopic strength of fundamental particles. We propose experimental procedures for levitation and employ linear estimation to extract the dark damping coefficient. Utilizing current levitation results, we demonstrate that the fundamental transfer cross section of dark matter can be of the order ${\sigma }_T^{\mathrm{D}}\text{lsim}\mathcal{O}(10^{-26})\mathrm{c}{\mathrm{m}}^2$.

    ↳ cond-mat.stat-mechhep-phphysics.opticsNPB(2025)·1 citation
24. 24*

    The lattice extraction of the TMD soft function using the auxiliary field representation of the Wilson line

    Anthony Francis🇹🇼 · Issaku Kanamori🇯🇵 · C.-J. David Lin🇹🇼 · Wayne Morris🇹🇼 · Yong Zhao🇺🇸

    The TMD soft function can be obtained by formulating the Wilson line in terms of auxiliary 1-dimensional fermion fields on the lattice. In this formulation, the directional vector of the auxiliary field in Euclidean space has the form $\tilde{n}=(i{n}^0,{\vec{0}}_{\perp },n^3)$, where the time component is purely imaginary. The components of these complex directional vectors in the Euclidean space can be mapped directly to the rapidities of the Minkowski space soft function. We present the results of the one-loop calculation of the Euclidean space analog to the soft function using these complex directional vectors. As a result, we show that the calculation is valid only when the directional vectors obey the relation: $|r|=|n^3/n^0|>1$, and that this result corresponds to a computation in Minkowski space with space-like directed Wilson lines. Finally, we show that a lattice calculable object can be constructed that has the desired properties of the soft function.

    ↳ hep-lathep-ph1 citation
25. 25*

    Color-Kinematics Duality with Minimal Deformation: Two-Loop Four-Gluon Amplitudes in Pure Yang-Mills Revisited

    Zeyu Li🇨🇳 · Gang Yang🇨🇳

    The conjectured duality between color and kinematics has significantly advanced our understanding of both gauge and gravitational theories. However, constructing numerators that manifest the color-kinematics (CK) duality, even for the two-loop four-gluon amplitude in pure Yang-Mills, has been challenging. In this paper, we revisit this amplitude and show that the difficulty of applying CK duality can be overcome by introducing a simple deformation. Our approach distinguishes itself from previous studies by maximizing the use of off-shell CK duality while maintaining a compact ansatz. In particular, the deformation we introduce satisfies a subset of off-shell dual Jacobi relations. The resulting numerators are presented in $d$-dimensionally Lorentz invariant local form and are applicable to all helicities of external gluons. The solution we provide can be directly employed to construct the corresponding gravitational amplitude through double copy. Our findings suggest a novel and efficient strategy for constructing high-loop gauge and gravitational amplitudes using CK duality.

    ↳ hep-thhep-phJHEP(2024)·5 citations
26. 26*

    Lellouch-Lüscher factor for the $K\to 3\pi$ decays

    Jin-Yi Pang🇨🇳 · Rishabh Bubna🇩🇪 · Fabian Müller🇩🇪 · Akaki Rusetsky🇩🇪 · Jia-Jun Wu🇨🇳

    We derive an explicit expression for the Lellouch-Lüscher (LL) factor in the $K\to 3\pi$ decays at leading order (without derivative couplings). Several important technical details are addressed, like a proper decomposition into the isospin amplitudes, the choice of a minimal set of effective couplings and the renormalization, as well as the algorithm for the solution of the pertinent Faddeev equations in the infinite volume which is based on the contour deformation method. Most importantly, our numerical results demonstrate that the three-body force contributes very little to the LL factor. This result paves the way for the study of the $K\to 3\pi$ decays on the lattice.

    ↳ hep-lathep-phJHEP(2024)·18 citations
27. 27*

    On Schwinger-like pair production of baryons and new non-perturbative processes in electric field

    Alexander Gorsky🇷🇺 · Arseniy Pikalov🇷🇺

    We consider the Schwinger production of baryons in an external electric field in the worldline instanton approach. The process occurs in the confinement regime hence the holographic QCD and the Chiral Lagrangian are used as the tools. The new exponentially suppressed processes in a constant electric field involving the composite worldline instantons are suggested. These include the non-perturbative decay of a neutron into a proton and charged meson and the spontaneous production of $p\bar{n}{\pi }^{-}$ and $n\bar{p}{\pi }^{+}$ states.

    ↳ hep-thhep-phJETP Lett.(2024)·1 citation
28. 28*

    Ultracentral heavy ion collisions, transverse momentum and the equation of state

    Govert Nijs🇨🇭 · Wilke van der Schee🇨🇭

    Ultracentral heavy ion collisions due to their exceptionally large multiplicity probe an interesting regime of quark-gluon plasma where the size is (mostly) fixed and fluctuations in the initial condition dominate. Spurred by the recent measurement of the CMS collaboration we investigate the driving factors of the increase of transverse momentum, including a complete analysis of the influence of the QCD equation of state. Particularly interesting is the influence of the centrality selection as well as the initial energy deposition.

    ↳ nucl-thhep-phnucl-exPLB(2024)·25 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.