HEP Phenomenology·hep-ph

Wed·Jan 25, 2023Wednesday·January 25, 2023

13 papers—8 primary·5 cross-listed·reconstructed*

01*
Effect of mesonic off-shell correlations in the PNJL equation of state
Konstantin Maslov🇨🇿 · David Blaschke🇵🇱
We study the meson contribution to the equation of state of the 2-flavor PNJL model, including the full momentum dependence of the meson polarization loops. Within the Beth-Uhlenbeck approach, we demonstrate that the contribution from the quark-antiquark continuum excitations in the spacelike region $ω^{2} - q^{2} < 0$ , i.e. the Landau damping, leads to an increase of the pressure for temperatures $≳ 0.8 T_{c}^{χ}$ and a significant meson momentum cut-off dependence in the mesonic pressure and the QCD trace anomaly. We investigate the dependence of the results on the choice of the Polyakov-loop potential parameter $T_{0}$ . From the dependence of the mesonic pressure on the current quark mass, by means of the Feynman-Hellmann theorem, we evaluate the contribution of the pion quasiparticle gas and Landau damping to the chiral condensate.
hep-phnucl-thPRD(2023)·11 citations
02*
Test of the TMD gluon density in a proton with the longitudinal structure function $F_{L} (x, Q^{2})$
Lipatov A.V. · Lykasov G.I. · Malyshev M.A
We investigate the dependence of the deep inelastic proton structure function $F_{L} (x, Q^{2})$ on different forms of the transverse momentum dependent (TMD, or unintegrated) gluon distribution. We present a comparison of theoretical results with the latest experimental data taken by the H1 and ZEUS Collaborations at HERA. We demonstrate that these data, despite of having quite large uncertainties, can test different kinds of the gluon TMD in a proton. Moreover, different phenomenological models at low $x$ could be tested by future experiments on deep inelastic scattering.
hep-phPLB(2023)·16 citations
03*
Constraints on anomalous dimensions from the positivity of the S-matrix
Mikael Chala🇪🇸
We show that the analyticity and crossing symmetry of the S-matrix, together with the optical theorem, impose restrictions on the renormalisation group evolution of dimension-eight operators in the Standard Model Effective Field Theory. Moreover, in the appropriate basis of operators, the latter manifest as zeros in the anomalous dimension matrix that, to the best of our knowledge, have not been anticipated anywhere else in the literature. Our results can be trivially extended to other effective field theories.
hep-phhep-thPRD(2023)·29 citations
04*
Charm and beauty content of the pion and kaon in the Flavor U(5) Nambu-Jona-Lasinio model
W. F. de Sousa🇧🇷 · F. L. Braghin🇧🇷
We consider a U(5)-Nambu-Jona-Lasinio model with flavor-dependent couplings constants obtained from quark-antiquark polarization to investigate the role of the heavy quarks for light constituent quarks and mesons. A quantum mixing, due to the different representations of the flavor group needed to defined quarks and mesons, lead to charm and beauty sea quark contributions to properties of the light quark sector. For a given fitting procedure for the parameters of the model, the charm and beauty quark effective masses are freely varied from very small values to very large values (infinite). The effect of these variations on pion and kaon observables, such as masses, weak decay constants and condensates, is calculated. Although the pion mass can vary (seemingly too much) up to $20%$ for a very large variation of heavy quark effective masses, their contributions for the kaon mass are at most of the order of $2%$ and all the other variables and observables, including up and down quark constituent masses, vary at most around $1%$ .
hep-ph0 citations
05*
Retuning radio astronomy for axion dark matter with neutron stars
Javier De Miguel🇯🇵
A model is constructed to predict the emission originating from axion-to-photon conversion in the strongly magnetized ultrarelativistic plasma of neutron stars. The acceleration and multiplicity of the charges are observed to shift the axion-induced spectral feature with respect to previous expectations. The frequency range of interest widens accordingly, and heavier dark matter axions may resonate in magnetospheric splits giving rise to detectable radio signals that could extend into the millimeter band. Ultimately, this work follows an affirmative answer to the question of whether neutron stars can give rise to any detectable high-frequency spectral feature that would allow us to probe axion dark matter of masses up to about a millielectronvolt. SGR 1745--2900 emerges as a particularly promising astrophysical laboratory for probing high-frequency axion dark matter.
hep-phastro-ph.HEPLB(2025)·3 citations
06*
Compact representation for electroweak lepton sector
Peter Porshnev🇧🇾
A new representation of electroweak lepton sector is proposed. It consists of two Weyl spinors per one lepton family. It is shown that proposed representation is fully equivalent to the conventional left-handed iso-doublet. New type of plane wave solutions can be found under certain additional assumptions.
hep-ph0 citations
07*
Relevant Dilaton Stabilization
Csaba Csáki🇺🇸 · Michael Geller🇮🇱 · Zamir Heller-Algazi🇮🇱 · Ameen Ismail🇺🇸
We propose a simple modification of the Goldberger-Wise mechanism for stabilizing the scale of spontaneously broken conformal theories. The source of explicit conformal symmetry breaking is a relevant operator with a small coefficient, as opposed to the usual mechanism of an almost marginal operator with an order-one coefficient. In the warped 5D picture this relevant stabilization corresponds to a small tadpole for the bulk scalar on the UV brane, which can be technically natural if it is the only source for the breaking of a symmetry (for example, a discrete $Z_{2}$ ). This modification of the stabilization mechanism has significant consequences for the nature of the conformal phase transition, since the radion/dilaton potential is no longer shallow. The bounce action is significantly reduced, leading to a weaker first-order phase transition instead of the supercooled and strongly first-order transition seen in Goldberger-Wise stabilization. This also leads to reduction of gravitational wave signals which, however, may still be observable at future detectors. We present numerical and analytical studies of the phase transition and the resulting gravitational wave signal strength, assuming that the effective dilaton potential provides a good leading approximation. While the dilaton is not expected to be generically light in this setup, in order to keep perturbative control over the effective theory one needs to mildly tune the dilaton quartic to be somewhat small.
hep-phhep-thJHEP(2023)·24 citations
08*
Neutrino Electromagnetic Properties and the Weak Mixing Angle at the LHC Forward Physics Facility
Roshan Mammen Abraham🇺🇸 · Saeid Foroughi-Abari🇨🇦 · Felix Kling🇩🇪 · Yu-Dai Tsai🇺🇸
The LHC produces an intense beam of highly energetic neutrinos of all three flavors in the forward direction, and the Forward Physics Facility (FPF) has been proposed to house a suite of experiments taking advantage of this opportunity. In this study, we investigate the FPF's potential to probe the neutrino electromagnetic properties, including neutrino millicharge, magnetic moment, and charge radius. We find that, due to the large flux of tau neutrinos at the LHC, the FPF detectors will be able to provide more sensitive constraints on the tau neutrino magnetic moment and millicharge than previous measurements at DONUT, by searching for excess in low recoil energy electron scattering events. We also find that, by precisely measuring the rate of neutral current deep inelastic scattering events, the FPF detectors have the potential to obtain the strongest experimental bounds on the neutrino charge radius for the electron neutrino, and one of the leading bounds for the muon neutrino flavor. The same signature could also be used to measure the weak mixing angle, and we estimate that $sin^{2} θ_{W}$ could be measured to about $3%$ precision at a scale $Q \sim 10$ GeV, shedding new light on the longstanding NuTeV anomaly.
hep-phPRD(2025)·36 citations
09*
Soliton Merger Rates and Enhanced Axion Dark Matter Decay
Xiaolong Du🇺🇸 · David J. E. Marsh🇬🇧 · Miguel Escudero🇨🇭 · Andrew Benson🇺🇸 · Diego Blas🇪🇸 · Charis Kaur Pooni🇬🇧 · Malcolm Fairbairn🇬🇧
Solitons are observed to form in simulations of dark matter (DM) halos consisting of bosonic fields. We use the extended Press-Schechter formalism to compute the mass function of solitons, assuming various forms for the relationship between halo mass and soliton mass. We further provide a new calculation of the rate of soliton major mergers. Solitons composed of axion DM are unstable above a critical mass, and decay to either relativistic axions or photons, depending on the values of the coupling constants. We use the computed soliton major merger rate to predict the enhanced DM decay rate due to soliton instability. For certain values of currently allowed axion parameters, the energy injection into the intergalactic medium from soliton decays to photons is comparable to or larger than the energy injection due to core collapse supernovae at $z > 10$ . A companion paper explores the phenomenology of such an energy injection.
↳ astro-ph.COastro-ph.HEhep-phPRD(2024)·40 citations
10*
Fluctuations near the liquid-gas and chiral phase transitions in hadronic matter
Michał Marczenko🇵🇱 · Krzysztof Redlich🇵🇱 · Chihiro Sasaki🇵🇱
We investigate the fluctuations of the net-baryon number density in dense hadronic matter. Chiral dynamics is modeled via the parity doublet Lagrangian, and the mean-field approximation is employed to account for chiral criticality. We focus on the qualitative properties and systematics of the second-order susceptibility of the net-baryon number density for individual positive- and negative-parity nucleons whose masses become degenerate at the chiral restoration. It is shown that the second-order susceptibility of the positive-parity state can become negative when the chiral symmetry is restored, as a natural consequence of the unique relationship of the mass to the order parameter. Moreover, we find that such negative fluctuations are indicative of approaching the critical point on the chiral phase boundary. Our results may have consequences for the interpretation of the experimental data on net-proton fluctuations in heavy-ion collisions.
↳ nucl-thhep-phPRD(2023)·14 citations
11*
No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation
Sayantan Choudhury🇮🇳 · Mayukh R. Gangopadhyay🇮🇳 · M. Sami🇮🇳
We examine the possibility of Primordial Black Holes (PBHs) formation in single-field models of inflation. Using the adiabatic or wave function renormalization scheme in the short-range modes, we show that one-loop correction to the power spectrum is free from quadratic UV divergence. We consider a framework in which PBHs are produced during the transition from Slow Roll (SR) to Ultra Slow Roll (USR) followed by the end of inflation. We demonstrate that the renormalized power spectrum softens the contribution of the logarithmic IR divergence and severely restricts the possible mass range of produced PBHs in the said transition, namely, $M_{PBH} \sim 1 0^{2} gm$ ala a no-go theorem. In particular, we find that the produced PBHs are short-lived ( $t_{PBH}^{evap} \sim 1 0^{- 20} sec$ ) and the corresponding number of e-folds in the USR region is restricted to $Δ N_{USR} \approx 2$ .
↳ astro-ph.COgr-qchep-phhep-thEPJC(2024)·144 citations
12*
Dark Matter searches at CMS and ATLAS
Danyer Perez Adan (on behalf of the ATLAS and CMS Collaborations)🇩🇪
A glimpse into the most recent searches for Dark Matter at the LHC performed by the ATLAS and CMS collaborations is presented. The results covered in this document are all based on Run-2 proton-proton collision data recorded at $s = 13 TeV$ and corresponding to an integrated luminosity of just under 140 $fb^{- 1}$
↳ hep-exhep-ph19 citations
13*
Direct Measurements of Galactic Cosmic Rays
Nicola Tomassetti🇮🇹
This paper reviews recent progress in the field of direct measurements of Galactic cosmic rays. High-statistic measurements of cosmic ray energy spectra, chemical and isotopic composition, and the rare antimatter components have been made using large particle physics experiments operating in space. The recent results are discussed in relation to our understanding of the origin of cosmic rays, the open questions, and the challenges for future experiments of direct detection.
↳ astro-ph.HEhep-exhep-phphysics.space-phPoS(2023)·4 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.