Mon·Jan 9, 2023Monday·January 9, 2023

1. 01*

   Transverse spin asymmetries at the EIC as a probe of anomalous electric and magnetic dipole moments

   Radja Boughezal🇺🇸 · Daniel de Florian🇦🇷 · Frank Petriello🇺🇸 · Werner Vogelsang🇩🇪

   We show that inclusive single-spin asymmetries (SSAs) with transversely polarized protons or electrons at a future electron ion collider (EIC) are sensitive to new physics contributions to electroweak dipole operators of electrons and quarks. We use the Standard Model Effective Field Theory (SMEFT) to parameterize possible heavy new physics contributions to these couplings. We show that new physics scales at or beyond the TeV-scale can be probed assuming realistic EIC run parameters, and that the transverse spin asymmetries are sensitive to different combinations of the dipole couplings than other measurements such as anomalous magnetic or electric dipole moments. We also study the physics potential of SSAs at a possible future upgrade of the EIC to collide muons and protons. Measurements at such an upgrade could probe the same SMEFT parameters that explain the current anomaly in the muon anomalous magnetic moment, and could also improve current bounds on the muon electric dipole moment.

   hep-phPRD(2023)·25 citations
2. 02*

   Gauge Sector Dynamics in QCD

   M. N. Ferreira🇪🇸 · J. Papavassiliou🇪🇸

   The dynamics of the gauge sector of QCD give rise to nonperturbative phenomena that are crucial for the internal consistency of the theory; most notably, they account for the generation of a gluon mass through the action of the Schwinger mechanism, the taming of the Landau pole and the ensuing stabilization of the gauge coupling, and the infrared suppression of the three-gluon vertex. In the present work, we review some key advances in the ongoing investigation of this sector within the framework of the continuum Schwinger function methods, supplemented by results obtained from lattice simulations.

   hep-phhep-lathep-thnucl-thParticles(2023)·97 citations
3. 03*

   High-quality axions in a class of chiral $U(1)$ gauge theories

   Yu-Cheng Qiu🇨🇳 · Jin-Wei Wang🇨🇳 · Tsutomu T. Yanagida🇨🇳

   We show that there are many candidates for the quintessence and/or the QCD axions in a class of chiral $U(1)$ gauge theories. Their qualities are high enough to serve as the dark energy and/or to solve the strong CP problem. Interestingly, the high quality of axion is guaranteed by the gauged $U(1)$ and ${\mathbf{Z}}_{2N}$ symmetries and hence free from the non-perturbative quantum gravity corrections. Furthermore, our mechanism can be easily applied to the Fuzzy dark matter axion scenarios.

   hep-phPRL(2023)·21 citations
4. 04*

   Discussion on Inert Doublet Model and loop correction of $HH\to hh$

   Sumit Satapathy🇮🇳

   We take the Lagrangian of Inert Doublet Model and with unitary gauge calculate all the possible interactions, after calculating the interactions we draw the corresponding Feynman diagrams.There after calculate the Scattering cross section of the processes that contribute in the decay or scattering of DM candidate. In the concluding chapter we calculate the one loop correction to the process $HH\to hh$ and see all the possible loop contribution at this scale.

   hep-ph0 citations
5. 05*

   An $SU(15)$ Approach to Bifermion Classification

   Claudio Coriano🇮🇹 · Paul H. Frampton🇮🇹 · Thomas W. Kephart🇺🇸 · D. Melle🇮🇹 · T.-C. Yuan🇹🇼

   One interesting way to extend the standard model is the hypothesis of bifermions which are bosons which couple to pairs of quarks and leptons. We point out that $SU(15)$ grand unification gives a natural way to classify bifermions and discuss leptoquarks, biquarks and bileptons. In fact, $SU(15)$ provides an ideal covering group as it contains all possible bifermions within a single model.

   hep-phMod.Phys.Lett.A(2023)·4 citations
6. 06*

   Hard jet substructure in a multistage approach

   Y. Tachibana🇯🇵 · A. Kumar🇨🇦 · A. Majumder🇺🇸 · A. Angerami🇺🇸 · R. Arora🇺🇸 · S. A. Bass🇺🇸 · S. Cao🇨🇳 · Y. Chen🇺🇸 · T. Dai🇺🇸 · L. Du🇨🇦 · R. Ehlers🇺🇸 · H. Elfner🇩🇪 and 47 other authors

   We present predictions and postdictions for a wide variety of hard jet-substructure observables using a multistage model within the JETSCAPE framework. The details of the multistage model and the various parameter choices are described in [A. Kumar et al., arXiv:2204.01163]. A novel feature of this model is the presence of two stages of jet modification: a high virtuality phase [modeled using the modular all twist transverse-scattering elastic-drag and radiation model (MATTER)], where modified coherence effects diminish medium-induced radiation, and a lower virtuality phase [modeled using the linear Boltzmann transport model (LBT)], where parton splits are fully resolved by the medium as they endure multiple scattering induced energy loss. Energy-loss calculations are carried out on event-by-event viscous fluid dynamic backgrounds constrained by experimental data. The uniform and consistent descriptions of multiple experimental observables demonstrate the essential role of modified coherence effects and the multistage modeling of jet evolution. Using the best choice of parameters from [A. Kumar et al., arXiv:2204.01163], and with no further tuning, we present calculations for the medium modified jet fragmentation function, the groomed jet momentum fraction $z_g$ and angular separation $r_g$ distributions, as well as the nuclear modification factor of groomed jets. These calculations provide accurate descriptions of published data from experiments at the Large Hadron Collider. Furthermore, we provide predictions from the multistage model for future measurements at the BNL Relativistic Heavy Ion Collider.

   hep-phhep-exnucl-exnucl-thPRC(2024)·47 citations
7. 07*

   Muon Beam for Neutrino CP Violation: connecting energy and neutrino frontiers

   Alim Ruzi🇨🇳 · Tianyi Yang🇨🇳 · Dawei Fu🇨🇳 · Sitian Qian🇨🇳 · Leyun Gao🇨🇳 · Qiang Li🇨🇳

   We propose here a proposal to connect neutrino and energy frontiers, by exploiting collimated muon beams for neutrino oscillations, which generate symmetric neutrino and antineutrino sources: ${\mu }^{+}\to e^{+}{\bar{\nu }}_{\mu }{\nu }_e$ and ${\mu }^{-}\to e^{-}{\nu }_{\mu }{\bar{\nu }}_e$. Interfacing with long baseline neutrino detectors such as DUNE and T2K, this experiment can be applicable to measure tau neutrino properties, and also to probe neutrino CP phase, by measuring muon electron (anti-)neutrino mixing or tau (anti-)neutrino appearance, and differences between neutrino and antineutrino rates. There are several significant benefits leading to large neutrino flux and high sensitivity on CP phase, including 1) collimated and manipulable muon beams, which lead to a larger acceptance of neutrino sources in the far detector side; 2) symmetric ${\mu }^{+}$ and ${\mu }^{-}$ beams, and thus symmetric neutrino and antineutrino sources, which make this proposal ideally useful for measuring neutrino CP violation. More importantly, ${\bar{\nu }}_{e,\mu }\to {\bar{\nu }}_{\tau }$ and ${\nu }_{e,\mu }\to {\nu }_{\tau }$, and, ${\bar{\nu }}_e\to {\bar{\nu }}_{\mu }$ and ${\nu }_e\to {\nu }_{\mu }$ oscillation signals can be collected simultaneously, with no needs for separate specific runs for neutrinos or antineutrinos. Based on a simulation of neutrino oscillation experiment, we estimate $10^4$ tau (anti-) neutrinos can be collected within 5 years which makes this proposal suitable for a brighter tau neutrino factory. Moreover, more than 7 standard deviations of sensitivity can be reached for $\text{dcp}=|\pi /2|$, within only five ears of data taking, by combining tau and muon (anti-) neutrino appearances. With the development of a more intensive muon beam targeting future muon collider, the neutrino potential of the current proposal will surely be further improved.

   hep-phhep-exphysics.acc-phphysics.pop-ph3 citations
8. 08*

   Systematic study of one-loop realizations of $d=7$ long-range $0\nu \beta \beta$ decay operators

   Ping-Tao Chen🇨🇳 · Gui-Jun Ding🇨🇳 · Chang-Yuan Yao🇨🇳

   We study the systematical one-loop decomposition of the dimension-7 long-range $0\nu \beta \beta$ decay operators. We find that there are 3 genuine one-loop topologies and 8 diagrams. The procedure to determine the SM quantum number assignments for both internal and external fields is presented. The Majorana neutrino mass in long-range $0\nu \beta \beta$ models is discussed. We also present a one-loop $0\nu \beta \beta$ decay model which produces Majorana neutrino mass at three-loop level. The phenomenological predictions for light neutrino mass and $0\nu \beta \beta$ decay half-life time including both mass mechanism and long-range contribution are studied.

   hep-phJHEP(2023)·1 citation
9. 09*

   Jet substructure probe to unfold singlet-doublet dark matter in the presence of non-standard cosmology

   Prasanta Kumar Das🇮🇳 · Partha Konar🇮🇳 · Saumyen Kundu🇮🇳 · Sudipta Show🇮🇳

   We examine the singlet-doublet fermionic dark matter model, where the non-thermal production of the dark matter in light of a non-standard cosmology demands a significantly large interaction rate than the typical radiation-dominated Universe. Despite being a model of freeze-in light dark matter and heavy mediator, the characteristic long-lived particle searches at the collider experiment and the displaced vertex signature do not help in probing such a dark sector since this non-standard interaction mandates nearly prompt decay. We make a counterproposal to probe such signal with di-fat-jets generated from the boosted decays of massive vector bosons and Standard Model Higgs, along with the substantial missing transverse momentum to probe the dark matter at LHC. Interestingly, substructure variables associated with these fat jets have an additional handle to tackle the extensive QCD background as it encodes implicit footmarks of their origin. We adopt the multivariate analysis with the booted decision tree to constrain the measured relic density allowed parameter space of dark matter in the presence of the modified cosmological scenario. Our study shows how the non-trivial expansion affects dark matter production in the early Universe and alters the required search strategies at colliders. This probe provides the best discovery prospect at the HL-LHC for extended parameter space now opened up in the dark sector.

   hep-phJHEP(2023)·12 citations
10. 10*

    Optimal search reach for heavy neutral leptons at a muon collider

    Krzysztof Mękała🇵🇱 · Jürgen Reuter🇩🇪 · Aleksander Filip Żarnecki🇵🇱

    Neutrinos are the most elusive particles known. Heavier sterile neutrinos mixing with the standard neutrinos might solve the mystery of the baryon asymmetry of the universe. In this letter, we show that among all future energy frontier accelerators, muon colliders will provide the farthest search reach for such neutrinos for mass ranges above the $Z$ pole into the multi-TeV regime. We compare the performance of muon with electron colliders of the same machine energy and briefly discuss the complementarity in flavor space between the two types of accelerators.

    hep-phhep-exPLB(2023)·51 citations
11. 11*

    331 Model Predictions for Rare $B$ and $K$ Decays, and $\Delta F=2$ Processes: an Update

    Andrzej J. Buras🇩🇪 · Fulvia De Fazio🇮🇹

    Motivated by the improved results from the HPQCD lattice collaboration on the hadronic matrix elements entering $\Delta M_{s,d}$ in $B_{s,d}^0-{\bar{B}}_{s,d}^0$ mixings and the increase of the experimental branching ratio for $B_s\to {\mu }^{+}{\mu }^{-}$, we update our 2016 analysis of various flavour observables in four 331 models, M1, M3, M13 and M16 based on the gauge group $SU(3{)}_C\times SU(3{)}_L\times U(1{)}_X$. These four models, which are distinguished by the quantum numbers, are selected among 24 331 models through their consistency with the electroweak precision tests and simultaneously by the relation $C_9^{\text{NP}}=-b{C}_{10}^{\text{NP}}$ with $b\ge 2$, which after new result on $B_s\to {\mu }^{+}{\mu }^{-}$ from CMS is favoured over the popular relation $C_9^{\text{NP}}=-C_{10}^{\text{NP}}$ predicted by several leptoquark models. In this context we investigate in particular the dependence of various observables on $|V_{cb}|$, varying it in the broad range $[0.0386,0.043]$, that encompasses both its inclusive and exclusive determinations. Imposing the experimental constraints from ${\epsilon }_K$, $\Delta M_s$, $\Delta M_d$ and the mixing induced CP asymmetries $S_{\psi K_S}$ and $S_{\psi K_S}$, we investigate for which values of $|V_{cb}|$ the four models can be made compatible with these data and what is the impact on $B$ and $K$ branching ratios. In particular we analyse NP contributions to the Wilson coefficients $C_9$ and $C_{10}$ and the decays $B_{s,d}\to {\mu }^{+}{\mu }^{-}$, $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ and $K_L\to {\pi }^0\nu \bar{\nu }$. This allows us to illustrate how the value of $|V_{cb}|$ determined together with other parameters of these models is infected by NP contributions and compare it with the one obtained recently under the assumption of the absence of NP in ${\epsilon }_K$, $\Delta M_s$, $\Delta M_d$ and $S_{\psi K_S}$.

    hep-phhep-exhep-latJHEP(2023)·19 citations
12. 12*

    Identifying modified theories of gravity using binary black-hole ringdowns

    Costantino Pacilio🇮🇹 · Swetha Bhagwat🇬🇧

    Black-hole spectroscopy, that is, measuring the characteristic frequencies and damping times of different modes in a black-hole ringdown, is a powerful probe for testing deviations from the general theory of relativity (GR). In this work, we present a comprehensive study on its ability to identify deviations from the spectrum of a Kerr black hole in GR. Specifically, we investigate the performance of black hole spectroscopy on a diverse set of theoretically motivated as well as phenomenologically modified spectra. We find that while the signal-to-noise ratio ${\rho }_{\mathrm{RD}}$ in the ringdown required to identify a modification to the GR Kerr black hole spectrum depends on the details of the modifications, a modification that introduces $\sim 1\%$ shift in the fundamental mode frequencies can typically be distinguished with ${\rho }_{\mathrm{RD}}\in [150,500]$. This range of ${\rho }_{\mathrm{RD}}$ is feasible with the next-generation detectors, showing a promising science case for black hole spectroscopy.

    ↳ gr-qcastro-ph.HEhep-phhep-thPRD(2023)·14 citations
13. 13*

    Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves

    Ke-Pan Xie🇨🇳

    Primordial black holes (PBHs) are predicted in many models via different formation mechanisms. Identifying the origin of PBHs is of the same importance as probing their existence. We propose to probe the asteroid-mass PBHs [$\mathcal{O}(10^{17})\mathrm{g}\lesssim M\lesssim \mathcal{O}(10^{22})\mathrm{g}$] with gamma-rays from Hawking radiation and the stochastic gravitational waves (GWs) from the early Universe. We consider four concrete formation mechanisms, including collapse from primordial curvature perturbations, first-order phase transitions, or cosmic strings, and derive the extended PBH mass functions of each mechanism for phenomenological study. The results demonstrate that by combining gamma-rays and GW signals we can probe PBHs up to $\mathcal{O}(10^{19})\mathrm{g}$ and identify their physical origins.

    ↳ astro-ph.COhep-phJCAP(2023)·27 citations
14. 14*

    Null energy condition violation: Tunnelling versus the Casimir effect

    Jean Alexandre🇬🇧 · Drew Backhouse🇬🇧

    We show that tunnelling between two degenerate minima, as allowed in a finite volume, leads to a non-extensive symmetric ground state. This results in Null Energy Condition violation for sufficiently low temperatures, when a continuous set of momenta in the box containing the field is assumed. Taking into account discrete momenta can modify this picture and is achieved via the addition of the Casimir energy to the tunnelling-induced ground state energy. Focusing on zero-temperature, these non-trivial effects are found to compete, depending on the typical length scales involved.

    ↳ hep-thhep-phquant-phPRD(2023)·12 citations
15. 15*

    21 cm Line Astronomy and Constraining New Physics

    Pravin Kumar Natwariya🇮🇳

    The 21 cm signal appears to be a treasure trove to provide an insight into the period when the first generation of luminous objects formed in the Universe. Hydrogen is the predominating fraction of the total baryonic matter during cosmic dawn (CD). Therefore, it is convenient and advantageous to study physics during CD using the 21 cm signal. The presence of any exotic source of energy can inject energy into the intergalactic medium (IGM) and heat the gas. Subsequently, it can modify the absorption amplitude in the global 21 cm signal. This feature can provide a robust bound on such sources of energy injection into the IGM gas.

    ↳ astro-ph.COhep-ph5 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.