Wed·Jan 29, 2025Wednesday·January 29, 2025

1. 01*

   High Energy Vector Boson Scattering in Four-Body Final States to Probe Higgs Cubic, Quartic, and HEFT interactions

   Shameran Mahmud🇺🇸 · Kohsaku Tobioka🇺🇸

   We compute the energy scales of perturbative unitarity violation in various $2\to 4$ vector boson scattering (VBS) processes and compare them to lower multiplicity processes. The final states include $h^4$, $V_L{V}_{L}hh$, and $V_L^4$, where $V_L$ represents the longitudinal mode of $Z$ or $W$ boson, and $h$ the Higgs boson. We consider scenarios with modified cubic and quartic Higgs self-couplings, including those derived from the Standard Model Effective Field Theory (SMEFT), as well as scenarios involving derivative operators from Higgs Effective Field Theory (HEFT). Modified Higgs self-couplings typically lead to perturbative unitarity violation in at least the $2\to 3$ VBS; however, the corresponding energy scales of unitarity violation are often very high. Our analysis reveals that, in the case of modified Higgs potentials, $2\to 4$ processes exhibit significantly lower energy scales of unitarity violation compared to $2\to 3$ processes. This, combined with the fact that the cross sections of $2\to 4$ processes increase with energy, suggests they generate more signal events at high energies, $\sqrt{\hat{s}}\gtrsim 2$ TeV, which could be achieved in future colliders. In contrast, for HEFT derivative interactions, higher multiplicity offers diminished benefits, as $2\to 4$ cross sections are often smaller than those of related $2\to 3$ processes within the valid energy range. This study shows that $2\to 4$ VBS processes are particularly compelling for probing Higgs potential modification, including the cubic and quartic couplings, but are less advantageous when derivative interactions dominate.

   hep-phhep-exJHEP(2025)·8 citations
2. 02*

   Light scalar beyond the Higgs mixing limit

   Cédric Delaunay🇫🇷 · Teppei Kitahara🇯🇵 · Yotam Soreq🇮🇱 · Jure Zupan🇺🇸

   We explore the possibility that the interactions of a light scalar singlet, which mixes with the Standard Model~(SM) Higgs, also receive other UV contributions of comparable size. We focus, in particular, on the flavor aligned limit, where couplings of the light scalar to the SM are almost flavor diagonal, but not necessarily proportional to the Higgs Yukawa couplings. The phenomenology of such a general flavor aligned light scalar differs from both the Higgs-mixed scalar, as well as from a general axion-like particle. We explore this for light scalar masses below a few hundred MeV, such that they can be produced in kaon decays, and in decays of $\eta$ and ${\eta }^{\prime }$ mesons, and the transitions described using chiral perturbation theory. We then derive constraints on the light scalar interactions, assuming that light scalar decays are either just into photons or are invisible. We also discuss several UV examples of such light scalar models: a two-Higgs doublet model extended by a light scalar, a light dilaton from the dark sector, and a SM extended by heavy vector-like quarks and a light scalar. For the latter we also performed matching onto low energy theory at one-loop.

   hep-phhep-exJHEP(2025)·18 citations
3. 03*

   Hybrid Hadronization -- A Study of In-Medium Hadronization of Jets

   A. Sengupta🇺🇸 · R. J. Fries🇺🇸 · M. Kordell II🇺🇸 · B. Kim🇺🇸 · A. Angerami🇺🇸 · R. Arora🇺🇸 · S. A. Bass🇺🇸 · Y. Chen🇺🇸 · R. Datta🇺🇸 · L. Du🇨🇦 · R. Ehlers🇺🇸 · H. Elfner🇩🇪 and 41 other authors

   QCD jets are considered important probes for quark gluon plasma created in collisions of nuclei at high energies. Their parton showers are significantly altered if they develop inside of a deconfined medium. Hadronization of jets is also thought to be affected by the presence of quarks and gluons. We present a systematic study of the effects of a thermal bath of partons on the hadronization of parton showers. We use the JETSCAPE framework to create parton showers both in vacuum and in a brick of quark gluon plasma. The brick setup allows important parameters, like the size of the plasma as well as the collective flow of partons, to be varied systematically. We hadronize the parton showers using Hybrid Hadronization, which permits shower partons to form strings with thermal partons, or to recombine directly with thermal partons as well as with each other. We find a sizeable amount of interaction of shower partons with thermal partons during hadronization, indicating a natural continuation of the interaction of jet and medium during this stage. The observed effects grow with the size of the medium. Collective flow easily transfers from the thermal partons onto the emerging jet hadrons. We also see a significant change in hadron chemistry as expected in the presence of quark recombination processes.

   hep-phnucl-exnucl-th8 citations
4. 04*

   Field-theoretical approach to neutral pion contribution to muon $g-2$

   Masashi Hayakawa🇯🇵

   The hadronic light-by-light scattering induces a substantial contribution to the muon $g-2$ with present accuracy of its measurement. The effect caused by the neutral pion through this scattering on the muon $g-2$ has been scrutinized intensively by model calculation and lattice QCD simulation. All of those estimates have been done based on one formula, but it has one pathological aspect. The purpose of this article is to resolve such a pathology from a field-theoretical approach, i.e., by defining the effect in question as the neutral pion intermediate state contribution to the QCD vacuum expectation value of time-ordered product of four electromagnetic currents. It leads (1) the pion pole term corresponding to the imaginary part of the pion propagator $\frac{1}{q^2-m_{\pi }^2+\mathrm{i}ϵ}$, (2) and no principle value term corresponding to its real part, resolving the pathology.

   hep-phhep-lat1 citation
5. 05*

   Polarized Dissociation and Spin Alignment of Moving Quarkonium in Quark-Gluon Plasma

   Zhishun Chen🇨🇳 · Shu Lin🇨🇳

   Recent experiments have found spin alignment of $J/\psi$ with respect to event plane in heavy ion collisions, suggesting a medium effect that is spin dependent. We propose a possible mechanism with polarized dissociation from the motion of $J/\psi$ with respect to the medium. We calculate polarized dissociation rate for quarkonium spin triplet state from spin chromomagnetic coupling in the potential non-relativistic QCD framework. This is done for the leading order gluo-dissociation process and next to leading order inelastic Coulomb scattering process. The polarized dissociation rate is expressed as a function of relative velocity between quarkonium and QGP and the quantization axis. Applying the polarized dissociation rate to quarkonium evolution with dissociation effect only in a Bjorken flow, we find the spin $0$ state to dissociate less than the other spin states, leading to positive ${\rho }_{00}-1/3$. Regeneration contribution is expected to give a contribution with the opposite sign.

   hep-phnucl-exnucl-thPRD(2025)·5 citations
6. 06*

   New molecular bonds existing in the strong interaction

   Hua-Xing Chen🇨🇳

   Similar to the covalent bond in chemical molecules induced by shared electrons, we proposed in [Commun. Theor. Phys. 74 (2022) 125201] the hadronic covalent bond induced by shared light quarks to explain the $T_{cc}(3875)$ and the deuteron. In this paper we improve and extend this mechanism to explain the $Z_c(3900)$, which is bound by the shared light quark-antiquark pair along with sea quark-antiquark pairs from the vacuum. Our analysis is based on the following forward and backward reasoning: a hadronic molecule exists, iff the attraction between its components is strong enough, iff the wave functions of its components significantly overlap with each other, iff the Pauli principle is well satisfied among all the shared quarks and antiquarks. Additionally, the $X(3872)$ is so unique that we need to further consider the annihilation of the shared light quark-antiquark pair, just in line with the reasoning that the creation and annihilation of sea quark-antiquark pairs should be given equal consideration. Both the creation and annihilation molecular bonds exist only in the strong interaction, not in the electromagnetic interaction, and they provide a quasi-static low-energy platform for studying the QCD confinement.

   hep-phCommun.Theor.Phys.(2026)·1 citation
7. 07*

   Confined Monopoles in Chiral Bag

   Fan Lin🇨🇳 · Yong-Liang Ma🇨🇳

   The chiral bag model offers a dual description of hadron physics in terms of quarks and hadrons in the sense of Cheshire Cat principle. In this work, we find that, within the chiral bag, confinement is likely caused by monopole condensation. The chiral bag surface can be interpreted as an ${\eta }^{\prime }$ domain wall, where a dynamical Chern-Simons theory emerges. Under level-rank duality, the Chern-Simons theory serves as the counterterm introduced to block the so-called color charge leakage. To ensure the correct net baryon number of the full chiral bag, an additional Chern-Simons theory involving the vector meson field arises on the bag surface and extends outside the bag. This leads to a Chern-Simons-Higgs theory localized on the ${\eta }^{\prime }$ domain wall, as previously conjectured. We also propose that the skyrmion description of baryons could be understood as a system of monopoles enveloped by a meson cloud.

   hep-phhep-thnucl-thPRD(2025)·2 citations
8. 08*

   Effect of nuclear medium on the spatial distribution of pions

   Satyajit Puhan🇮🇳 · Navpreet Kaur🇮🇳 · Arvind Kumar🇮🇳 · Suneel Dutt🇮🇳 · Harleen Dahiya🇮🇳

   We calculate the valence quark generalized parton distributions (GPDs) of the lightest pseudoscalar meson, pion, in an isospin asymmetric nuclear matter at zero temperature by employing a light-cone quark model. The medium modifications in the unpolarized GPDs have been incorporated by taking inputs from the chiral SU($3$) quark mean field model. The electromagnetic form factors (EMFFs) and charge radii have been calculated for both the vacuum and in-medium cases. These results are found to be in agreement with the available experimental data and other model predictions.

   hep-phnucl-thNPB(2025)·7 citations
9. 09*

   Chiral oscillations in finite time quantum field theory

   Massimo Blasone🇮🇹 · Francesco Giacosa🇵🇱 · Luca Smaldone🇮🇹 · Giorgio Torrieri🇧🇷

   We demonstrate how chiral oscillations of a massive Dirac field can be described within quantum field theory using a finite-time interaction picture approach, where the mass term in the Lagrangian is treated as a perturbative coupling between massless fields of definite chirality. We derive the formula for chiral oscillations at the fourth order in the perturbative expansion, obtaining a result consistent with the formula derived by means of other methods. Furthermore, we illustrate how the perturbative framework of chiral oscillations can effectively describe production processes where an electron must exhibit both left chirality and positive helicity, as in decay ${\pi }^{-}\to e^{-}+{\bar{\nu }}_e$. Finally, we argue that, in this perturbative view, chiral oscillations are also essential for detecting the decay products in such processes.

   hep-phhep-thEPJC(2025)·9 citations
10. 10*

    Goldstone bosons at non-zero temperature

    Peter Lowdon🇩🇪 · Owe Philipsen🇩🇪

    Spontaneous symmetry breaking in quantum field theories at non-zero temperature still holds fundamental open questions, in particular what happens to vacuum Goldstone bosons when the temperature is increased. By investigating a complex scalar field theory on the lattice we demonstrate that Goldstone bosons at non-zero temperature behave like screened massless particle-like excitations, so-called thermoparticles, which continue to exist even in the symmetry-restored phase of the theory. We provide non-perturbative evidence for the functional form of the Goldstone mode's dissipative behaviour, and determine its corresponding spectral properties. Since the persistence of thermal Goldstone modes within symmetry-restored phases is predicted to be a model-independent characteristic, this has fundamental consequences for systems in which continuous symmetries are restored at high temperatures.

    hep-phhep-lathep-thnucl-thPRD(2025)·5 citations
11. 11*

    Predictions on observing hot holographic quark star with gravitational waves

    Le-Feng Chen🇨🇳 · Heng-Yi Yuan🇨🇳 · Meng-Hua Zhou🇨🇳 · Kun Lu🇨🇳 · Jing-Yi Wu🇨🇳 · Kilar Zhang🇨🇳

    We extract the equation of state of hot quark matter from a holographic 2+1 flavor QCD model, which could form the core of a stable compact star. By adding a thin hadron shell, a new type of hybrid star is constructed. With the temperature serving as a parameter, the EoS varies and we obtain stable stars with mass ranging from about 5 to 30 solar masses, and the maximum compactness around 0.2. The I-Love-Q-C relations are further discussed, and compared with the neutron star cases. These compact stars are candidates for black hole mimickers, which could be observed by gravitational waves and distinguished by properties like nonzero tidal Love number and electromagnetic signals.

    hep-phastro-ph.HEgr-qchep-thPRD(2025)·2 citations
12. 12*

    One-loop Renormalization Group Equations in Generic Effective Field Theories. Part I: Bosonic Operators

    Mikołaj Misiak🇵🇱 · Ignacy Nałęcz🇵🇱

    We consider a generic class of effective quantum field theories with arbitrary gauge groups and scalar matter fields. In such theories, we derive the one-loop Renormalization Group Equations (RGEs) for the physical dimension-six operators. The present paper is the first one in a series that is going to cover theories with spin-$\frac{1}{2}$ matter fields, too, including the phenomenologically most relevant SMEFT and LEFT cases. Our present approach provides tools for deriving the yet unknown two-loop RGEs in the SMEFT.

    hep-phJHEP(2025)·19 citations
13. 13*

    Energy Correlators Beyond Angles

    Samuel Alipour-fard🇺🇸 · Wouter J. Waalewijn🇳🇱

    Energy correlators are theoretically simple and physically intuitive observables that bridge experimental and theoretical particle physics. They have for example enabled the most precise jet substructure determination of the strong coupling constant to date, and recent proposals suggest that they may be used to precisely determine of the top quark mass with calculable, small theoretical uncertainties. However, existing energy correlators all measure correlations in angles between particles, from which other observables such as mass must be inferred through potentially complicated procedures. In this work, we generalize energy correlators to enable straightforward measurements of non-angular correlations, which we call Energy Weighted Observable Correlations (EWOCs). To enforce collinear safety, EWOCs quantify correlations between subjets rather than particles. The subjet radius can be tuned to control both the physical scales probed by EWOCs and their sensitivity to non-perturbative physics. We focus on the phenomenologically relevant example of the mass EWOC, which measures mass correlations between pairs of subjets, in the task of extracting mass scales from jets. In jet substructure determinations of the mass of a hadronically-decaying W boson, we show that the mass EWOC outperforms the angle-based energy correlator, and performs comparably to the soft-drop groomed jet mass. As a first exploration of the theoretical properties of EWOCs, we also calculate the mass EWOC on light-quark jets and compare to results obtained with Pythia.

    hep-phhep-exJHEP(2025)·12 citations
14. 14*

    QCD Theory meets Information Theory

    Benoît Assi🇺🇸 · Stefan Höche🇺🇸 · Kyle Lee🇺🇸 · Jesse Thaler🇺🇸

    We present a novel technique to incorporate precision calculations from quantum chromodynamics into fully differential particle-level Monte-Carlo simulations. By minimizing an information-theoretic quantity subject to constraints, our reweighted Monte Carlo incorporates systematic uncertainties absent in individual Monte Carlo predictions, achieving consistency with the theory input in precision and its estimated systematic uncertainties. Our method can be applied to arbitrary observables known from precision calculations, including multiple observables simultaneously. It generates strictly positive weights, thus offering a clear path to statistically powerful and theoretically precise computations for current and future collider experiments. As a proof of concept, we apply our technique to event-shape observables at electron-positron colliders, leveraging existing precision calculations of thrust. Our analysis highlights the importance of logarithmic moments of event shapes, which have not been previously studied in the collider physics literature.

    hep-phhep-exhep-thphysics.data-anPRL(2025)·12 citations
15. 15*

    A universal bound on the duration of a kination era

    Cem Eröncel🇹🇷 · Yann Gouttenoire🇮🇱 · Ryosuke Sato🇯🇵 · Géraldine Servant🇩🇪 · Peera Simakachorn🇪🇸

    We show that primordial adiabatic curvature fluctuations generate an instability of the scalar field sourcing a kination era. We demonstrate that the generated higher Fourier modes constitute a radiation-like component dominating over the kination background after about $11$ e-folds of cosmic expansion. Current constraints on the extra number of neutrino flavors $\Delta N_{\mathrm{eff}}$ thus imply the observational bound of approximately 10 e-folds, representing the most stringent bound to date on the stiffness of the equation of state of the pre-Big-Bang-Nucleosynthesis universe.

    hep-phastro-ph.COgr-qcPRL(2025)·19 citations
16. 16*

    Cosmological Moduli and Non-perturbative Production of Axions

    Robert Wiley Deal · Leia Barrowes · John T. Giblin · Jr. · Kuver Sinha · Scott Watson · Fred C. Adams

    Cosmological moduli generically come to dominate the energy density of the early universe, and thereby trigger an early matter dominated era. Such non-standard cosmological histories are expected to have profound effects on the evolution and production of axion cold dark matter and dark radiation, as well as their prospects for detection. We consider moduli-axion couplings and investigate the early history of the coupled system, considering closely the evolution of the homogeneous modulus field, the back-reaction from the axion, and the energy densities of the two fields. A particular point of interest is the enhancement of axion production from modulus decay, due to tachyonic and parametric resonant instabilities, and the implications of such production on the cosmological moduli problem, axion dark radiation, and the available parameter space for axion dark matter. Using an effective field theory approach, WKB-based semi-analytical analysis, and detailed numerical estimates of the co-evolution of the system, we evaluate the expected decay efficiency of the modulus to axions. The effects of higher-order operators are studied and implications for UV-complete frameworks such as the Large Volume Scenarios in Type IIB string theory are considered in detail.

    hep-phastro-ph.COJHEP(2025)·6 citations
17. 17*

    Freezing-in the Pure Dark Axion Portal

    Paola Arias🇨🇱 · Bastián Díaz Sáez🇨🇱 · Joerg Jaeckel🇩🇪

    A $Z_2$ symmetry under which "dark'' and "visible'' fields transform differently can further seclude already dark particles. In a dark sector consisting of an axion-like particle and a dark photon the dominant interaction can then be via a dark photon-axion portal to the ordinary photon. If the axion is lighter than the dark photon it naturally emerges as a viable dark matter candidate. We explore its freeze-in production both in a standard high reheating temperature and weak coupling as well as a low reheating temperature and strong coupling regime. Cosmological constraints are taken into account to identify viable regions in parameter space. For the strong freeze-in regime, we highlight the possibility of probing it at B-factories. We also briefly discuss a potential misalignment contribution to the dark matter density and delineate under which conditions it can be neglected.

    hep-phJCAP(2025)·13 citations
18. 18*

    Two-body charmed baryon nonleptonic weak decays with decuplet baryon involving SU(3) breaking effects

    Chao-Qiang Geng🇨🇳 · Chia-Wei Liu🇨🇳 · Sheng-Lin Liu🇨🇳

    We study the singly charmed baryon two-body decays of ${\mathbf{B}}_c\to {\mathbf{B}}_{D}P$ under $SU(3{)}_F$ flavor symmetry, where ${\mathbf{B}}_c$ refers to anti-triplet singly charmed baryons, and ${\mathbf{B}}_D$ and $P$ denote decuplet baryons and pseudoscalar mesons, respectively. Compared to the literature, we adopt a concise and reasonable treatment of the $SU(3)$ flavor symmetry breaking, by considering the final-state mass dependence of partial waves. With 4 real parameters in total and 9 experimental data points, we achieve a minimal ${\chi }^2/\text{d.o.f.}$ value of $1.46$, providing a satisfactory explanation to the experiment results. We evaluate the branching ratios and Lee-Yang parameters suggesting the absence of the strong phase in ${\mathbf{B}}_c\to {\mathbf{B}}_{D}P$, along with an unusual positive decay asymmetry $\alpha ({\Xi }_c^0\to {\Omega }^{-}{K}^{+})$. The predicted results of large $SU(3{)}_F$ breaking effects in ${\mathbf{B}}_c\to {\mathbf{B}}_{D}P$ can be verified in the further research by the experiments at BESIII, Belle-II and LHCb.

    hep-phhep-exJHEP(2025)·2 citations
19. 19*

    Mass gap in non-perturbative quadratic ${\mathcal{R}}^2$ gravity via Dyson-Schwinger

    Sayantan Choudhury🇵🇱 · Marco Frasca🇮🇹 · Anish Ghoshal🇵🇱

    We apply in a simple model derived from quadratic ${\mathcal{R}}^2$ gravity the technique of Dyson-Schwinger equations to solve for its corresponding quantum theory. Particularly, we solve the classical equations of motion to get a solution to the hierarchy of Dyson-Schwinger equations in the limit of large Ricci scalar, assumed to be constant and larger than the square of the Starobinsky mass. Moving to the Einstein frame, the model admits Higgs-like solutions with a single particle having a finite mass. We quantize the scalar field showing the appearing of a mass gap through a Higgs-like solution. The presence of the mass gap, that increases with the square root of the Ricci scalar, shows how the effect of the scalar sector at low-energy becomes ineffective, making it relevant only at short distances.

    ↳ hep-thgr-qchep-phNPB(2026)·1 citation
20. 20*

    Revisiting color superconductors in bottom-up holography

    Edwan Préau🇳🇱

    We revisit the problem of constructing a color superconducting phase in bottom-up holography. We introduce a model that describes the five-dimensional dynamics of a scalar field dual to a chiral symmetry breaking condensate, which is coupled to the RR 4-form. The coupling is given by a topological WZ term, which is elegantly responsible both for scalar condensation at high density, and color Higgsing in the condensed phase. This construction realizes both properties at finite density and Higgsing fraction.

    ↳ hep-thhep-phJHEP(2025)·5 citations
21. 21*

    Left-hand cut and the HAL QCD method

    Sinya Aoki🇯🇵 · Takumi Doi🇯🇵 · Yan Lyu🇯🇵

    We investigate how the left-hand cut (LHC) problem is treated in the HAL QCD method. For this purpose, we first consider the effect of the LHC to the scattering problem in non-relativistic quantum mechanics with potentials. We show that the $S$-matrix or the scattering phase shift obtained from the potential including the Yukawa term ($e^{-m_{\pi }r}/r$) with the infra-red (IR) cutoff $R$ is well-defined even for the complex momentum $k$ as long as $R$ is finite, and they are compared with those obtained by the analytic continuation without the IR cutoff. In the $R\to \infty$ limit, the phase shift approaches the result from the analytic continuation at $\mathrm{Im}k<m_{\pi }/2$, while they differ at $\mathrm{Im}k>m_{\pi }/2$, except $k=k_b$, where $k_b$ is the binding momentum. We also observe that $k_b$ can be correctly obtained even at finite but large $R$. Using knowledge obtained in the non-relativistic quantum mechanics, we present how we should treat the LHC in the HAL QCD potential method.

    ↳ hep-lathep-phnucl-thPoS(2025)·10 citations
22. 22*

    Multi-Messenger and Cosmological Constraints on Dark Matter through Two-Fluid Neutron Star Modeling

    Ankit Kumar🇯🇵 · Sudhakantha Girmohanta🇨🇳 · Hajime Sotani🇯🇵

    In this study, we investigate the impact of dark matter (DM) on neutron stars (NSs) using a two-fluid formalism that treats nuclear matter (NM) and DM as gravitationally coupled components. Employing NM equations of state spanning a wide range of stiffness and a self-interacting asymmetric fermionic DM framework, we explore the emergence of DM core- and halo-dominated structures and their observational implications. Constraints from gravitational waves (GW170817), NICER X-ray measurements (PSR J0030+0451), and pulsar mass limits (PSR J0740+6620) delineate a consistent parameter space for DM properties derived from these multi-messenger observations. DM halo-dominated configurations, while consistent with PSR J0740+6620's mass limits and NICER's radius measurements for PSR J0030+0451, are ruled out by the tidal deformability bounds inferred from the GW170817 event. Consequently, the combined limits inferred from the observational data of GW170817, PSR J0030+0451, and PSR J0740+6620 support the plausibility of DM core-dominated configurations. Constraints on the DM self-interaction strength from galaxy cluster dynamics further refine the DM parameter space permitted by NS observations. This work bridges multi-messenger astrophysics and cosmology, providing insights into DM interactions and their implications for NS structure, evolution, and observational signatures.

    ↳ astro-ph.HEhep-phhep-thEPJC(2025)·17 citations
23. 23*

    Impact of light sterile neutrinos on cosmological large scale structure

    Rui Hu🇨🇳 · Ming-chung Chu🇨🇳 · Shek Yeung🇨🇳 · Wangzheng Zhang🇨🇳

    Sterile neutrinos with masses on the $\mathrm{eV}$ scale are promising candidates to account for the origin of neutrino mass and the reactor neutrino anomalies. The mixing between sterile and active neutrinos in the early universe could result in a large abundance of relic sterile neutrinos, which depends on not only their physical mass $m_{\mathrm{phy}}$ but also their degree of thermalization, characterized by the extra effective number of relativistic degrees of freedom $\Delta N_{\mathrm{eff}}$. Using neutrino-involved N-body simulations, we investigate the effects of sterile neutrinos on the matter power spectrum, halo pairwise velocity, and halo mass and velocity functions. We find that the presence of sterile neutrinos suppress the matter power spectrum and halo mass and velocity functions, but enhance the halo pairwise velocity. We also provide fitting formulae to quantify these effects.

    ↳ astro-ph.COhep-phJCAP(2025)·5 citations
24. 24*

    Resummed effective actions and heat kernels: the Worldline approach and Yukawa assisted pair creation

    Filippo Fecit🇮🇹 · Sebastián Franchino-Viñas🇮🇹 · Francisco D. Mazzitelli🇦🇷

    We adapt the Worldline Formalism to obtain resummed expressions for the effective action and the heat kernel of a quantum scalar field coupled to a Yukawa background. The resummation includes all the invariants built from powers, first derivatives and second derivatives of the latter. Using such results, we compute the instability of the vacuum computing the vacuum persistence amplitude and the corresponding Schwinger pair production probability. We show that the inclusion of an additional, rapidly varying background can greatly enhance the production of pairs.

    ↳ hep-thhep-phmath-phmath.MPJHEP(2025)·14 citations
25. 25*

    First Axion-Like Particle Results from a Broadband Search for Wave-Like Dark Matter in the 44 to 52 $\mu$eV Range with a Coaxial Dish Antenna

    Gabe Hoshino🇺🇸 · Stefan Knirck🇺🇸 · Mohamed H. Awida🇺🇸 · Gustavo I. Cancelo🇺🇸 · Simon Corrodi🇺🇸 · Martin Di Federico🇺🇸 · Benjamin Knepper🇺🇸 · Alex Lapuente🇺🇸 · Mira Littmann🇺🇸 · David W. Miller🇺🇸 · Donald V. Mitchell🇺🇸 · Derrick Rodriguez🇺🇸 and 7 other authors

    We present the results from the first axion-like particle search conducted using a dish antenna. The experiment was conducted at room temperature and sensitive to axion-like particles in the $44-52\mu \mathrm{eV}$ range ($10.7-12.5\mathrm{GHz}$). The novel dish antenna geometry was proposed by the BREAD collaboration and previously used to conduct a dark photon search in the same mass range. To allow for axion-like particle sensitivity, the BREAD dish antenna was placed in a $3.9\mathrm{T}$ solenoid magnet at Argonne National Laboratory. In the presence of a magnetic field, axion-like dark matter converts to photons at the conductive surface of the reflector. The signal is focused onto a custom coaxial horn antenna and read out with a low-noise radio-frequency receiver. No evidence of axion-like dark matter was observed in this mass range and we place the most stringent laboratory constraints on the axion-photon coupling strength, $g_{a\gamma \gamma }$, in this mass range at 90\% confidence.

    ↳ hep-exastro-ph.IMhep-phphysics.ins-detPRL(2025)·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.