Thu·Feb 9, 2023Thursday·February 9, 2023

1. 01*

   Hadronic structure on the light-front VII. Pions and kaons and their partonic distributions

   Wei-Yang Liu🇺🇸 · Edward Shuryak🇺🇸 · Ismail Zahed🇺🇸

   This work is a continuation in our series of papers, that addresses quark models of hadronic structure on the light front, motivated by the QCD vacuum structure and lattice results. The spontaneous breaking of chiral symmetry on the light front, is shown to parallel that in the rest frame, where the non-local instanton induced ${}^{\prime }$t Hooft interaction plays a central role. By rewriting this interaction solely in terms of the good component of the fermionic field, a scalar chiral condensate emerges in the mean-field approximation, which is identical to the one obtained in the rest frame. The pions and kaons emerge as deeply bound Goldstone modes in the chiral limit, with the scalar-isoscalar sigma meson mode as a threshold state with zero binding. We explicitly derive the light front distribution amplitudes (DAs) and partonic functions (PDFs) for these mesons. The DAs and PDFs are in good agreement with those extracted from the QCD instanton vacuum in the rest frame, using the large momentum effective theory (LaMET). The QCD evolved DAs and PDFs compare well with available measurements, as well as recent lattice results.

   hep-phnucl-thPRD(2023)·18 citations
2. 02*

   Revisiting Inert Doublet Model Parameters

   Hamza Abouabid🇲🇦 · Abdesslam Arhrib🇲🇦 · Ayoub Hmissou🇲🇦 · Larbi Rahili🇲🇦

   In this study, we aim to see how much the actual measurement of the Z+photon and di-photon signal strength, $\text{mugaga}$ and $\text{mugaZ}$, could influence the allowed parameter space of the Inert Doublet Model (IDM), and to what extent such measurement can be aligned with the latest bound from XENON1T experiment on the spin-independent dark-matter-nucleon scattering cross-section. Also, by considering the new embedded scalars in the IDM (i.e., $H$, $A$, and $H^{\pm }$), a wide investigation of the one-loop radiative corrections to the trilinear Higgs coupling $hhh$ has been made in the light of the previous measurements.

   hep-phEPJC(2024)·8 citations
3. 03*

   Medium-Assisted Enhancement of $X(3872)$ Production from Small to Large Colliding Systems

   Yu Guo🇨🇳 · Xingyu Guo🇨🇳 · Jinfeng Liao🇺🇸 · Enke Wang🇨🇳 · Hongxi Xing🇨🇳

   Studies of exotic hadrons such as the ${\chi }_{c1}(3872)$ state provide crucial insights into the fundamental force governing the strong interaction dynamics, with an emerging new frontier to investigate their production in high energy collisions where a partonic medium is present. Latest experimental measurements from the Large Hadron Collider show an intriguing evolution pattern of the ${\chi }_{c1}(3872)$-to-$\psi (2S)$ yield ratio from proton-proton collisions with increasing multiplicities toward proton-lead and lead-lead collisions. Here we propose a novel mechanism of medium-assisted enhancement for the ${\chi }_{c1}(3872)$ production, which competes with the more conventional absorption-induced suppression and results in a non-monotonic trend from small to large colliding systems. Realistic simulations from this model offer the first quantitative description of all available data. Predictions are made for the centrality dependence of this observable in PbPb collisions as well as for its system size dependence from OO and ArAr to XeXe and PbPb collisions. In both cases, a non-monotonic behavior emerges as the imprint of the competition between enhancement and suppression and can be readily tested by future data.

   hep-phPRC(2024)·11 citations
4. 04*

   Thermodynamic and hydrodynamic characteristics of interacting system formed in relativistic heavy ion collisions

   Xu-Hong Zhang🇨🇳 · Hao-Ning Wang🇨🇳 · Fu-Hu Liu🇨🇳 · Khusniddin K. Olimov🇺🇿

   To study the energy-dependent characteristics of thermodynamic and hydrodynamic parameters, based on the framework of a multi-source thermal model, we analyze the soft transverse momentum ($p_T$) spectra of the charged particles (${\pi }^{-}$, ${\pi }^{+}$, $K^{-}$, $K^{+}$, $\bar{p}$, and $p$) produced in gold-gold (Au-Au) collisions at the center-of-mass energies $\sqrt{s_{NN}}=7.7$, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV from the STAR Collaboration and in lead-lead (Pb-Pb) collisions at $\sqrt{s_{NN}}=2.76$ and 5.02 TeV from the ALICE Collaboration. In the rest framework of emission source, the probability density function obeyed by meson momenta satisfies the Bose-Einstein distribution, and that obeyed by baryon momenta satisfies the Fermi-Dirac distribution. To simulate the $p_T$ of the charged particles, the kinetic freeze-out temperature $T$ and transverse expansion velocity ${\beta }_T$ of emission source are introduced into the relativistic ideal gas model. Our results, based on the Monte Carlo method for numerical calculation, show a good agreement with the experimental data. The excitation functions of thermodynamic parameter $T$ and hydrodynamic parameter ${\beta }_T$ are then obtained from the analyses, which shows an increase tendency from 7.7 GeV to 5.02 TeV in collisions with different centralities.

   hep-phhep-exnucl-exnucl-thIJMPE(2023)·1 citation
5. 05*

   Can Leptonic Mixing Matrix have a Wolfenstein Form?

   Ankur Panchal🇮🇳 · G. Rajasekaran🇮🇳 · Rahul Srivastava🇮🇳

   We analyze the possibility of the leptonic mixing matrix having a Wolfenstein form at the Grand Unified Theory scale. The renormalization group evolution of masses and mixing angles from the high scale to electroweak scale, in certain new physics scenarios, can significantly alter the form of the leptonic mixing matrix. In the past it was shown that such significant enhancement implies that the leptonic mixing matrix at high scale can be the same or similar in structure to the quark one. We thoroughly analyze this hypothesis in the light of the latest neutrino oscillation data as well as other constraints such as those coming from neutrinoless double beta decay. We show that such an ansatz, at least within the context of minimal supersymmetric models, is no longer compatible with the latest experimental data.

   hep-phJHEP(2023)·0 citations
6. 06*

   Constraints on monopole-dipole potential from the tests of gravity

   Tanmay Kumar Poddar🇮🇳 · Debashis Pachhar🇮🇳

   Ultralight Axion Like Particle (ALP) can mediate a long range monopole-dipole macroscopic force between Earth and Sun if Earth is treated as a polarized source. There are about $10^{42}$ number of polarized electrons in Earth due to the presence of the geomagnetic field. The monopole-dipole interactions between electrons in Earth and nucleons in Sun can influence the perihelion precession of Earth, gravitational light bending and Shapiro time delay. The contribution of monopole-dipole potential is limited to be no larger than the measurement uncertainty. We obtain the first bound on monopole-dipole strength from single astrophysical observations. The perihelion precession of Earth puts the stronger bound on monopole-dipole coupling strength as $g_S{g}_P\lesssim 1.75\times 10^{-16}$ for the ALP of mass $m_a\lesssim 1.35\times 10^{-18}\mathrm{eV}$. We also obtain constraints on monopole-dipole coupling strength as $g_S{g}_P\lesssim 5.61\times 10^{-38}$ from two different astrophysical observations such as the perihelion precession of the planet and the red giant branch. The bound is three orders of magnitude stronger than the Eöt-Wash experiment and one order of magnitude stronger than the $(\mathrm{Lab}{)}_{\mathrm{S}}^{\mathrm{N}}\times (\mathrm{Astro}{)}_{\mathrm{P}}^{\mathrm{e}}$ limit.

   hep-phastro-ph.COgr-qcPRD(2023)·12 citations
7. 07*

   Hilltop Sneutrino Hybrid Inflation

   Chia-Min Lin🇨🇳

   In this work, we consider a hilltop version of the (supersymmetric) sneutrino hybrid inflation where the right-handed sneutrino field plays the role of the inflaton field. This model is a type III hilltop inflation that can produce a spectral index $n_s=0.96$ which fits perfectly to experimental observations without fine-tuning of parameters. We also briefly consider nonthermal leptogenesis via the decay of the right-handed sneutrino inflaton field after inflation.

   hep-phastro-ph.COhep-thChin.J.Phys.(2024)·1 citation
8. 08*

   Study of $X(6900)$ with unitarized coupled channel scattering amplitudes

   Shi-Qing Kuang🇨🇳 · Qi Zhou🇨🇳 · Di Guo🇨🇳 · Qin-He Yang🇨🇳 · Ling-Yun Dai🇨🇳

   In this paper, we study the resonant state $X(6900)$. The scattering amplitudes of coupled channels, $J/\psi J/\psi$-$J/\psi \psi (2S)$-$J/\psi \psi (3770)$, are constructed with the interaction of four vector mesons described by effective Lagrangians. The amplitudes are calculated up to one loop, decomposed by partial wave projection, and unitarized by Pad$\acute{e}$ approximation. These amplitudes are fitted to the latest experimental data sets of di-$J/\psi$ and $J/\psi \psi (2S)$ invariant mass spectra of LHCb, CMS, and ATLAS. High-quality solutions are obtained. With these partial wave amplitudes, we extract the pole parameters of the $X(6900)$. Its quantum number is likely to be $0^{++}$. According to the pole counting rule as well as analysis of the phase shifts of the partial waves, it supports our previous conclusion that the $X(6900)$ prefers to be a compact tetra-quark.

   hep-phnucl-thEPJC(2023)·30 citations
9. 09*

   One-loop matrix element emulation with factorisation awareness

   D. Maître🇬🇧 · H. Truong🇬🇧

   In this article we present an emulation strategy for one-loop matrix elements. This strategy is based on the factorisation properties of matrix elements and is an extension of the work presented in arXiv:2107.06625. We show that a percent-level accuracy can be achieved even for large multiplicity processes. The point accuracy obtained is such that it dwarfs the statistical accuracy of the training sample which allows us to use our model to augment the size of the training set by orders of magnitude without additional evaluations of expensive one-loop matrix elements.

   hep-phJHEP(2023)·38 citations
10. 10*

    Testing Discrete Symmetries in Ortho-Positronium Decays with the J-PET Detector

    Eryk Czerwiński🇵🇱

    A first result related to a CPT test in the decay of ortho-positronium based on data collected by means of the J-PET detector is already available, and a new test of CP symmetry is under investigation. Both results are based on the determination of angular correlations between momenta of gamma rays and other vector properties of the investigated system. Here, arguments for the possible usage of data collected by the J-PET group to test CPT symmetry within the Standard-Model Extension framework are shortly presented.

    hep-phhep-ex0 citations
11. 11*

    Origins of parameters in adimensional models

    Andrew Fowlie🇨🇳

    We explore the origins of parameters in adimensional theories -- fundamental theories with no classical massive scales. If the parameters originate as draws from a distribution, it should be possible to write a distribution for them that doesn't depend on or introduce any massive scales. These distributions are the invariant distributions for the renormalization group (RG). If there exist RG invariant combinations of parameters, the RG invariant distributions are specified up to arbitrary functions of the RG invariants. If such distributions can be constructed, adimensional theories could predict the values of their parameters through distributions that are constrained by the RG. If they can't be constructed, the parameters must originate in a different way. We demonstrate the RG invariant distributions in QCD, the Coleman-Weinberg model and a totally asymptotically free theory.

    hep-phInt.J.Theor.Phys.(2023)·1 citation
12. 12*

    The $X(6900)$ peak could be a molecular state

    Ye Lu🇨🇳 · Chang Chen🇨🇳 · Kai-Ge Kang🇨🇳 · Guang-you Qin🇨🇳 · Han-Qing Zheng🇨🇳

    The analyses of the LHCb data on $X(6900)$ found in di-$J/\psi$ and $J/\psi \psi (3686)$ systems are performed using a momentum-dependent {Flatté-like parameterization. The use of the pole counting rule and spectral density function sum rule give consistent conclusions that $X(6900)$ may not be a molecule of $J/\psi \psi (3686)$. Nevertheless it is still possible that $X(6900)$ be a molecule of higher states, such as $J/\psi \psi (3770)$, ${\chi }_{c0}{\chi }_{c2}$, etc.

    hep-phhep-exPRD(2023)·13 citations
13. 13*

    Probing the Higgs trilinear self-coupling through Higgs+jet production

    Jun Gao🇨🇳 · Xiao-Min Shen🇨🇳 · Guoxing Wang🇨🇳 · Li Lin Yang🇨🇳 · Bin Zhou🇨🇳

    We present the calculation of the next-to-leading order (NLO) electroweak (EW) corrections proportional to the Higgs trilinear self-coupling (${\lambda }_{HHH}$) for Higgs boson plus one jet production at the Large Hadron Collider (LHC). We use the method of large top quark mass expansion to tackle the most challenging two-loop virtual amplitude, and apply the Padé approximation to extend the region of convergence of the expansion. We find that the NLO EW corrections is $0.66\%$ for the total cross section. For the invariant mass distribution and Higgs boson transverse momentum distribution, the NLO corrections are almost flat with their values similar in size. Our results can be used to set extra constraints on ${\lambda }_{HHH}$ at the LHC.

    hep-phPRD(2023)·14 citations
14. 14*

    NLO QCD corrections to off-shell top-antitop production with semi-leptonic decays at lepton colliders

    Ansgar Denner🇩🇪 · Mathieu Pellen🇩🇪 · Giovanni Pelliccioli🇩🇪

    The study of top-quark properties will be a central aspect of the physics programme of any future lepton collider. In this article, we investigate the production of top-quark pairs in the semi-leptonic decay channel in ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ collisions, whose experimental signature is one charged lepton, jets, and missing energy. We present for the first time fiducial cross sections and differential distributions at next-to-leading-order accuracy in QCD for the full off-shell process. We find that the QCD corrections for the considered process are strongly dependent on the beam energies and range from few per cent up to more than $100\%$ (near threshold and above 1 TeV). We focus, in particular, on two scenarios: one close to threshold (365 GeV), dominated by top-pair production, and one at the TeV scale (1.5 TeV), for which irreducible-background contributions become relevant. An assessment of polarised-beam effects is also provided.

    hep-phhep-exEPJC(2023)·11 citations
15. 15*

    Probing Electroweak Phase Transition in Extended Singlet Scalar Model with Resonant $HH$ production in $bbZZ$ Channel using Parameterized Machine Learning

    Pritam Palit🇮🇳 · Sujay Shil🇧🇷

    In this paper, a collider signature of a heavy Higgs boson at $14$ TeV HL-LHC is studied, where the heavy Higgs boson decays into a pair of standard model Higgs boson, which further decays to $bbZZ$ state and subsequently to $bb{\ell }^{+}{\ell }^{-}{\nu }_{\ell }{\nu }_{\ell }$ final state. To study this, we consider singlet scalar extension of the standard model and select the parameter space and mass of the heavy Higgs boson such that it prefers a strong first-order electroweak phase transition. The study is done following the $bbZZ$ analysis of CMS Collaboration and further using parameterized machine learning for final discrimination which simplifies the training process along with an improved discrimination between signal and background over the range of benchmark points. Despite the lower branching fraction, this channel can be a potential probe of the electroweak phase transition with the data sets collected by the CMS and ATLAS experiments at the $14$ TeV HL-LHC with $3$ ${\mathrm{ab}}^{-1}$ of integrated luminosity and a production of resonant di-Higgs signal can be potentially discovered up to 490 GeV of resonance mass.

    hep-phJ.Phys.G(2024)·9 citations
16. 16*

    A Heavy QCD Axion and the Mirror World

    David I. Dunsky🇺🇸 · Lawrence J. Hall🇺🇸 · Keisuke Harigaya🇺🇸

    We study the mirror world with dark matter arising from the thermal freeze-out of the lightest, stable mirror particle -- the mirror electron. The dark matter abundance is achieved for mirror electrons of mass 225 GeV, fixing the mirror electroweak scale near $10^8$ GeV. This highly predictive scenario is realized by an axion that acts as a portal between the two sectors through its coupling to the QCD and mirror QCD sectors. The axion is more massive than the standard QCD axion due to additional contributions from mirror strong dynamics. Still, the strong CP problem is solved by this "heavy" axion due to the alignment of the QCD and mirror QCD potentials. Mirror entropy is transferred into the Standard Model sector via the axion portal, which alleviates overproduction of dark radiation from mirror glueball decays. This mirror scenario has a variety of signals: (1) primordial gravitational waves from the first-order mirror QCD phase transition occurring at a temperature near 35 GeV, (2) effects on large-scale structure from dark matter self-interactions from mirror QED, (3) dark radiation affecting the cosmic microwave background, and (4) the rare kaon decay, $K^{+}\to ({\pi }^{+}+\mathrm{axion})$. The first two signals do not depend on any fundamental free parameters of the theory while the latter two depend on a single free parameter, the axion decay constant.

    hep-phastro-ph.COhep-exJHEP(2024)·22 citations
17. 17*

    Systematic analysis of the impacts of symmetry energy parameters on neutron star properties

    N. K. Patra🇮🇳 · Anagh Venneti🇮🇳 · Sk Md Adil Imam🇮🇳 · Arunava Mukherjee🇮🇳 · B. K. Agrawal🇮🇳

    The impacts of various symmetry energy parameters on the properties of neutron stars (NSs) have been recently investigated, and the outcomes are at variance, as summarized in Table III of Phys. Rev. D 106, 063005 (2022). We have systematically analyzed the correlations of slope and curvature parameters of symmetry energy at the saturation density (${\rho }_0=0.16{\text{fm}}^{-3}$) with the tidal deformability and stellar radius of non-spinning neutron stars in the mass range of $1.2-1.6M_{\odot }$ using a large set of minimally constrained equations of state (EoSs). The EoSs at low densities correspond to the nucleonic matter and are constrained by empirical ranges of a few low-order nuclear matter parameters from the finite nuclei data and the pure neutron matter EoS from chiral effective field theory. The EoSs at high densities ($\rho >1.5-2{\rho }_0$) are obtained by a parametric form for the speed of sound that satisfies the causality condition. Several factors affecting the correlations between the NS properties and the individual symmetry energy parameters usually encountered in the literature are considered. These correlations are quite sensitive to the choice of the distributions of symmetry energy parameters and their interdependence. But, variations of NS properties with the pressure of $\beta -$ equilibrated matter at twice the saturation density remain quite robust which maybe due to the fact that the pressure depends on the combination of multiple nuclear matter parameters that describe the symmetric nuclear matter as well as the density dependence of the symmetry energy. Our results are practically insensitive to the behavior of EoS at high densities.

    ↳ nucl-thastro-ph.HEastro-ph.SRgr-qc+1PRC(2023)·34 citations
18. 18*

    Inflationary $\alpha$-Attractor Models with Singular Derivative of Potential

    Kei-ichiro Kubota🇯🇵 · Hiroki Matsui🇯🇵 · Takahiro Terada🇰🇷

    A generalization of inflationary $\alpha$-attractor models (``polynomial $\alpha$-attractor'') was recently proposed by Kallosh and Linde, in which the potential involves logarithmic functions of the inflaton so that the derivative of the potential but not potential itself has a singularity. We find that the models can lead to viable inflationary observables even without the pole in the kinetic term. Also, the generalization with a pole order other than two does not significantly change the functional form of the potential. This allows a systematic analysis of the predictions of this class of models. Our models predict larger spectral index $n_s$ and tensor-to-scalar ratio $r$ than in the polynomial $\alpha$-attractor: typically, $n_s$ around 0.97--0.98 and $r$ observable by LiteBIRD. Taking advantage of the relatively large $n_s$, we discuss the modification of the potential to produce primordial black holes as the whole dark matter and gravitational waves induced by curvature perturbations detectable by LISA and BBO/DECIGO, while keeping $n_s$ in agreement with the Planck/BICEP/Keck data.

    ↳ astro-ph.COgr-qchep-phhep-thJCAP(2023)·4 citations
19. 19*

    High-energy neutrino emission associated with gravitational-wave signals: effects of cocoon photons and constraints on late-time emission

    Riki Matsui🇯🇵 · Shigeo S. Kimura🇯🇵 · Kenji Toma🇯🇵 · Kohta Murase🇺🇸

    We investigate prospects for the detection of high-energy neutrinos produced in the prolonged jets of short gamma-ray bursts (sGRBs). The X-ray lightcurves of sGRBs show extended emission components lasting for 100-1000 seconds, which are considered to be produced by prolonged engine activity. Jets by prolonged engine activity should interact with photons in the cocoon formed by the jet propagation inside the ejecta of neutron star mergers. We calculate neutrino emission from jets by prolonged engine activity, taking account of the interaction between photons provided from the cocoon and cosmic rays accelerated in the jets. We find that IceCube-Gen2, a future neutrino telescope, with the second-generation gravitational wave detectors will probably be able to observe neutrino signals associated with gravitational waves with around 10 years of operation, regardless of the assumed value of the Lorentz factor of the jets. Neutrino observations may enable us to constrain the dissipation region of the jets. We apply this model to GRB 211211A, a peculiar long GRB whose origin may be a binary neutron-star merger. Our model predicts that IceCube is unlikely to detect any associated neutrino, but a few similar events will be able to put a meaningful constraint on the physical quantities of the prolonged engine activities.

    ↳ astro-ph.HEgr-qchep-phApJ(2023)·13 citations
20. 20*

    The Tameness of Quantum Field Theory, Part II -- Structures and CFTs

    Michael R. Douglas🇺🇸 · Thomas W. Grimm🇳🇱 · Lorenz Schlechter🇳🇱

    Tame geometry originated in mathematical logic and implements strong finiteness properties by defining the notion of tame sets and functions. In part I we argued that observables in a wide class of quantum field theories are tame functions and that the tameness of a theory relies on its UV definition. The aims of this work are (1) to formalize the connection between quantum field theories and logical structures, and (2) to investigate the tameness of conformal field theories. To address the first aim, we start from a set of quantum field theories and explain how they define a logical structure that is subsequently extended to a second structure by adding physical observables. Tameness, or o-minimality, of the two structures is then a well-defined property, and sharp statements can be made by identifying these with known examples in mathematics. For the second aim we quantify our expectations on the tameness of the set of conformal field theories and effective theories that can be coupled to quantum gravity. We formulate tameness conjectures about conformal field theory observables and propose universal constraints that render spaces of conformal field theories to be tame sets. We test these conjectures in several examples and highlight first implications.

    ↳ hep-thhep-phmath-phmath.LO+1Adv.Theor.Math.Phys.(2025)·16 citations
21. 21*

    The impact of the Large Magellanic Cloud on dark matter direct detection signals

    Adam Smith-Orlik🇨🇦 · Nima Ronaghi🇨🇦 · Nassim Bozorgnia🇨🇦 · Marius Cautun🇳🇱 · Azadeh Fattahi🇬🇧 · Gurtina Besla🇺🇸 · Carlos S. Frenk🇬🇧 · Nicolás Garavito-Camargo🇺🇸 · Facundo A. Gómez🇨🇱 · Robert J. J. Grand🇪🇸 · Federico Marinacci🇮🇹 · Annika H. G. Peter🇺🇸

    We study the effect of the Large Magellanic Cloud (LMC) on the dark matter (DM) distribution in the Solar neighborhood, utilizing the Auriga magneto-hydrodynamical simulations of Milky Way (MW) analogues that have an LMC-like system. We extract the local DM velocity distribution at different times during the orbit of the LMC around the MW in the simulations. As found in previous idealized simulations of the MW-LMC system, we find that the DM particles in the Solar neighborhood originating from the LMC analogue dominate the high speed tail of the local DM speed distribution. Furthermore, the native DM particles of the MW in the Solar region are boosted to higher speeds as a result of a response to the LMC's motion. We simulate the signals expected in near future xenon, germanium, and silicon direct detection experiments, considering DM interactions with target nuclei or electrons. We find that the presence of the LMC causes a considerable shift in the expected direct detection exclusion limits towards smaller cross sections and DM masses, with the effect being more prominent for low mass DM. Hence, our study shows, for the first time, that the LMC's influence on the local DM distribution is significant even in fully cosmological MW analogues.

    ↳ astro-ph.GAastro-ph.COhep-phJCAP(2023)·40 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.