Thu·Sep 28, 2023Thursday·September 28, 2023

1. 01*

   Resonant contribution of the three-body decay process ${\bar{B}}_s\to K^{+}{K}^{-}P$ in perturbation QCD

   Gang Lü🇨🇳 · Chang Chang Zhang🇨🇳 · Yan-Lin Zhao🇨🇳 · Li-Ying Zhang🇨🇳

   We investigate the CP violation in the decay process ${\bar{B}}_s\to \varphi (\rho ,\omega )P\to K^{+}{K}^{-}P$ by considering the interference effects of $\varphi \to K^{+}{K}^{-}$, $\rho \to K^{+}{K}^{-}$ and $\omega \to K^{+}{K}^{-}$ within the framework of perturbative QCD method (P refers to $\pi$, K, $\eta$ and ${\eta }^{\prime }$ pseudoscalar mesons, respectively). We analyse the mixings of $\varphi -{\rho }^0$, $\varphi -\omega$ and $\omega -{\rho }^0$ and provide the amplitudes of the quasi-two-body decay processes. The CP violation for ${\bar{B}}_s\to K^{+}{K}^{-}P$ decay process is obvious at the ranges of the three vector mesons interferences. Meanwhile, the localised CP violation can be found for comparing with the experiment results from three-body decay process at the LHC in the near future.

   hep-phCPC(2024)·4 citations
2. 02*

   Investigating excited ${\Omega }_c$ states from pentaquark perspective

   Ye Yan🇨🇳 · Xiaohuang Hu🇨🇳 · Hongxia Huang🇨🇳 · Jialun Ping🇨🇳

   Inspired by the recent observation of new ${\Omega }_c^0$ states by the LHCb Collaboration, we explore the excited ${\Omega }_c$ states from the pentaquark perspective in the quark delocalization color screening model. Our results indicate that the ${\Omega }_c(3185)$ can be well interpreted as a molecular $\Xi D$ predominated resonance state with $J^P=1/2^{-}$. The ${\Omega }_c(3120)$ can also be interpreted as a molecular ${\Xi }_c^{\ast }\bar{K}$ state with $J^P=3/2^{-}$ and a new molecular state ${\Xi }_c^{\ast }{\bar{K}}^{\ast }$ with $J^P=5/2^{-}$ and a mass of 3527 MeV is predicted, which is worth searching in the future. Other reported ${\Omega }_c$ states cannot be well described in the framework of pentaquark systems in present work. The three-quark excited state, or the unquenched picture may be a good explanation, which is worth further exploration.

   hep-phnucl-thPRD(2023)·17 citations
3. 03*

   Debye Screening of Non-Abelian Plasmas in Curved Spacetimes

   Elba Alonso-Monsalve🇺🇸 · David I. Kaiser🇺🇸

   Decades of analytic and computational work have demonstrated that a charge immersed in a hot plasma is screened. For both Abelian and non-Abelian interactions, the characteristic screening length $1/m_D$ is set by the so-called Debye mass $m_D\sim g_{s}T$, proportional to the plasma temperature $T$ and the dimensionless gauge coupling $g_s$. One of the most interesting naturally occurring examples is the quark-gluon plasma (QGP) that filled the early universe prior to the QCD confinement phase transition at $t_{\mathrm{QCD}}\sim 10^{-5}\mathrm{s}$. During this early epoch, regimes of strong spacetime curvature are of significant cosmological interest, such as near primordial black holes (PBHs). However, the typical description of Debye screening only applies within Minkowski spacetime, and is therefore insufficient to describe the dynamics of charged plasmas near PBHs or other primordial features. We construct an effective field theory for soft modes of the gauge field $A_{\mu }^a$ to give a full description of Debye screening in non-Abelian plasmas within arbitrary curved spacetimes, recovering a temperature-dependent Debye mass that exhibits gravitational redshift. We then apply our results to some scenarios of cosmological interest: an expanding FLRW universe and the vicinity of a PBH immersed in a hot QGP.

   hep-phastro-ph.COhep-thPRD(2023)·8 citations
4. 04*

   Spectrum and Decay Properties of Bottomonium Mesons

   Ishrat Asghar🇵🇰 · Nosheen Akbar🇵🇰

   We calculate the spectrum and wave functions (WFs) of various states of bottomonium mesons ($b\overline{b}$) using a non-relativistic quark potential model (NRQPM). The calculated WFs are used to compute the radiative widths of various states of $b\overline{b}$. The strong decays widths of bottomonium states are also calculated using ${}^3{P}_0$ model by choosing simple harmonic oscillator wave functions (SHOWFs). The $\beta$ of SHOWFs for various states of the mesons are measured by fitting the numerical wave functions. The radiative and strong decay widths are used to calculate the branching ratios of $b\overline{b}$ mesons. We also compare our calculated masses and widths with available experimental data.

   hep-phEPJA(2024)·7 citations
5. 05*

   Neutrino properties from the laboratory and the cosmos

   Pablo Martínez-Miravé🇪🇸

   Neutrinos are amongst the most abundant particles in the universe. The fact that they are massive particles proves that the Standard Model is an incomplete theory and needs to be extended. This thesis focuses on the study of neutrino properties from the available data from laboratory experiments and cosmological observations. It also presents sensitivity studies for future neutrino experiments. The first part covers the status of the determination of the oscillation parameters in the three-neutrino framework, the mass ordering and the absolute mass scale. A second part is devoted to other neutrino properties predicted in neutrino mass models. The topics covered include the study of spin-flavour precession in solar neutrinos from non-zero neutrino magnetic moments, the prospects for neutrino non-standard interactions with quarks from the solar sector and the expected limits on CPT violation from a separate analysis of neutrino and antineutrino data. Regarding cosmology, the impact of non-standard interactions with electrons and a non-unitary three-neutrino mixing matrix in the process of neutrino decoupling are addressed. Finally, a third part explores possible connections between dark matter and neutrinos. The existence of dark matter has been proven indirectly via its gravitational effects. This thesis presents two studies that explore how neutrinos could probe the fraction of dark matter that could exist in the form of primordial black holes and the experimental signatures expected from a hypothetical coupling between neutrinos and an ultralight scalar dark matter candidate.

   hep-phastro-ph.COhep-ex3 citations
6. 06*

   Correcting for cutoff dependence in backward evolution of QCD parton showers

   Stefano Frixione🇮🇹 · Bryan R. Webber🇬🇧

   Monte Carlo event generators for hard hadronic collisions depend on the evolution of parton showers backwards from a high-scale subprocess to the hadronization scale. The evolution is treated as a branching process with a sequence of resolvable parton emissions. The criterion of resolvability involves cutoffs that determine the no-emission probability (NEP) for a given range of the evolution scale. Existing event generators neglect cutoff-dependent terms in the NEP that, although formally power-suppressed, can have significant phenomenological effects. We compute such terms and study their consequences. One important result is that it is not possible for the backward shower to faithfully reproduce the cutoff-independent parton distribution functions (PDFs) used to generate it. We show that the computed NEP corrections mitigate but do not eliminate this problem. An alternative approach is to use cutoff-dependent PDFs that are consistent with the uncorrected NEP. Then one must apply cutoff-dependent corrections to hard subprocess matrix elements. We compute those corrections to the first nontrivial order for the Drell-Yan process and for Higgs production by gluon fusion.

   hep-phJHEP(2024)·8 citations
7. 07*

   Dispersive determination of fourth generation quark masses

   Hsiang-nan Li🇹🇼

   We determine the masses of the sequential fourth generation quarks $b^{\prime }$ and $t^{\prime }$ in the extension of the Standard Model by solving the dispersion relations associated with the mixing between the neutral states $Q\bar{q}$ and $\bar{Q}q$, $Q$ ($q$) being a heavy (light) quark. The box diagrams responsible for the mixing, which provide the perturbative inputs to the dispersion relations, involve multiple intermediate channels, i.e., the $ut$ and $ct$ channels, $u$ ($c$, $t$) being an up (charm, top) quark, in the $b^{\prime }$ case, and the $d{b}^{\prime }$, $s{b}^{\prime }$ and $b{b}^{\prime }$ ones, $d$ ($s$, $b$) being a down (strange, bottom) quark, in the $t^{\prime }$ case. The common solutions for the above channels lead to the masses $m_{b^{\prime }}=(2.7\pm 0.1)$ TeV and $m_{t^{\prime }}\approx 200$ TeV unambiguously. We show that these superheavy quarks, forming bound states in a Yukawa potential, barely contribute to Higgs boson production via gluon fusion and decay to photon pairs, and bypass current experimental constraints. The mass of the ${\bar{b}}^{\prime }{b}^{\prime }$ ground state is estimated to be about 3.2 TeV. It is thus worthwhile to continue the search for $b^{\prime }$ quarks or ${\bar{b}}^{\prime }{b}^{\prime }$ resonances at the (high-luminosity) large hadron collider.

   hep-phhep-exPRD(2024)·10 citations
8. 08*

   String Derived Z${}^{\prime }$ Model at an Upgraded Superconducting Super Collider

   Alon E. Faraggi🇬🇧 · Marco Guzzi🇺🇸 · Andrew McEntaggart🇺🇸

   The future of collider physics is under investigation. With the High Luminosity LHC program lasting until the late 2030s, the next machine in the energy frontier is envisioned to appear in 30--40 years, which may be too far into the future to sustain the field. In this paper we explore the physics potential of an Upgraded Superconducting Super Collider (USSC). The Original Superconducting Super Collider (OSSC) was planned to operate at 20TeV beam energy, and with improved magnet technology and/or longer tunnel, one may envision that it can be extended to 25--30TeV beam energy. Given that the decision on the OSSC construction took place in Autumn 1988 and it was planned to start operation in the 1996-1999 period, an USSC can be constructed 10--15 years from decision and fill the gap between the end of HL--LHC and the future envisioned machines. While the main mission of the USSC will be to test the Standard Model and its electroweak and strongly interacting sectors, as a specific example we illustrate the invariant mass distribution at NNLO in QCD for a 5 TeV $Z^{\prime }$ in the string derived $Z^{\prime }$ model.

   hep-phhep-ex3 citations
9. 09*

   Phases of Pseudo-Nambu-Goldstone Bosons

   Fotis Koutroulis🇵🇱 · Matthew McCullough🇨🇭 · Marco Merchand🇸🇪 · Stefan Pokorski🇵🇱 · Kazuki Sakurai🇵🇱

   We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for $SO(N+1)\to SO(N)$ spontaneous and explicit symmetry breaking. We determine the magnitude of explicit symmetry breaking consistent with an EFT description of the effective potential at zero and finite temperatures. We expose and clarify novel additional vacuum transitions that can arise for generic pNGBs below the initial scale of $SO(N+1)\to SO(N)$ spontaneous symmetry breaking, which may have phenomenological relevance. In this respect, two phenomenological scenarios are analyzed: thermal and supercooled dark sector pNGBs. In the thermal scenario the vacuum transition is first-order but very weak. For a supercooled dark sector we find that, depending on the sign of the explicit symmetry breaking, one can have a symmetry-restoring vacuum transition $SO(N-1)\to SO(N)$ which can be strongly first-order, with a detectable stochastic gravitational wave background signal.

   hep-phastro-ph.COJHEP(2024)·6 citations
10. 10*

    AutoEFT: Automated Operator Construction for Effective Field Theories

    Robert V. Harlander🇩🇪 · Magnus C. Schaaf🇩🇪

    The program AutoEFT is described. It allows one to generate Effective Field Theories (EFTs) from a given set of fields and symmetries. Allowed fields include scalars, spinors, gauge bosons, and gravitons. The symmetries can be local or global Lie groups based on U(1) and SU(N). The mass dimension of the EFT is limited only by the available computing resources. The operators are stored in a compact, human and machine-readable format. Aside from the program itself, we provide input files for EFTs based on the Standard Model and a number of its extensions. These include additional particles and symmetries, EFTs with minimal flavor violation, and gravitons.

    hep-phhep-thphysics.comp-phComput.Phys.Commun.(2024)·21 citations
11. 11*

    Dynamic fermion flavor mixing through transition dipole moments

    Johann Rafelski🇺🇸 · Andrew Steinmetz🇺🇸 · Cheng Tao Yang🇺🇸

    We show that Majorana neutrino flavor mixing can be driven by transition dipole moments in the presence of external electromagnetic fields. We demonstrate the sensitivity of the rotation mixing matrix to strong fields obtaining dynamical mass eigenstates in the two-flavor model. The three-flavor case and extensions to the quark sector are introduced.

    hep-phnucl-thInt.J.Mod.Phys.A(2023)·3 citations
12. 12*

    A Modular $SU(5)$ Littlest Seesaw

    Ivo de Medeiros Varzielas🇵🇹 · Steve F. King🇬🇧 · Miguel Levy🇵🇹

    We extend the littlest modular seesaw to a Grand Unified scenario based on $SU(5)$ endowed with three modular $S_4$ symmetries. We leverage symmetry protected zeroes in the leptonic and down quark sectors to suppress deviations to the littlest modular seesaw predictions, but not contributions to the quark mixing. The model is supplemented by two weighton fields, such that the hierarchical nature of the charged-lepton masses, as well as the quark masses and mixing, stem from the content and symmetries of the model, rather than a hierarchical nature of the Yukawa coefficients.

    hep-phJHEP(2024)·16 citations
13. 13*

    Limits on ALP-neutrino couplings from loop-level processes

    J. Bonilla🇪🇸 · B. Gavela🇪🇸 · J. Machado-Rodríguez🇪🇸

    We obtain new bounds on effective ALP-neutrino interactions from their loop-level impact on the ALP couplings to electroweak gauge bosons $\gamma Z$, $ZZ$ and $W^{+}{W}^{-}$. Both types of interactions are connected via the chiral anomaly, which allows to overcome the fermion mass suppression of tree-level analyses. ALP couplings to charged leptons are considered simultaneously with ALP-neutrino ones, as required by gauge invariance. Complete one-loop computations are presented together with relevant kinematic limits. We leverage data obtained from rare meson decay measurements alongside observations from collider experiments, among others. The novel constraints are particularly competitive for ALP masses $\gtrsim 100$ MeV, evidencing the powerful potential of future ALP searches at colliders which target its couplings to electroweak gauge bosons.

    hep-phPRD(2024)·22 citations
14. 14*

    Chained Quantile Morphing with Normalizing Flows

    Samuel Bright-Thonney🇺🇸 · Philip Harris🇺🇸 · Patrick McCormack🇺🇸 · Simon Rothman🇺🇸

    Accounting for inaccuracies in Monte Carlo simulations is a crucial step in any high energy physics analysis. It becomes especially important when training machine learning models, which can amplify simulation inaccuracies and introduce large discrepancies and systematic uncertainties when the model is applied to data. In this paper, we introduce a method to transform simulated events to better match data using normalizing flows, a class of deep learning-based density estimation models. Our proposal uses a technique called chained quantile morphing, which corrects a set of observables by iteratively shifting each entry according to a conditonal cumulative density function. We demonstrate the technique on a realistic particle physics dataset, and compare it to a neural network-based reweighting method. We also introduce a new contrastive learning technique to correct high dimensional particle-level inputs, which naively cannot be efficiently corrected with morphing strategies.

    hep-phhep-ex8 citations
15. 15*

    Dynamics of Long-lived Axion Domain Walls and Its Cosmological Implications

    Chia-Feng Chang🇺🇸 · Yanou Cui🇺🇸

    We perform an updated analysis on a long-lived axion domain wall (DW) network. By simulating the axion field on a 3D lattice and fitting an analytical model for the DW evolution, we identify the leading energy loss mechanisms of the DWs and compute the spectrum of axions emitted from the network. The contribution from the DWs to axion dark matter (DM) density is derived, with viable parameter space given. The application to both QCD axions and general axion-like particles (ALPs) are considered. Due to the new approaches taken, while our results bear consistency with earlier literature, notable discrepancies are also revealed, such as the prediction for DM abundance, which may have a profound impact on axion phenomenology at large.

    hep-phastro-ph.COhep-latJCAP(2025)·23 citations
16. 16*

    Lattice QCD calculation of the invisible decay $J/\psi \to \gamma \nu \bar{\nu }$

    Yu Meng🇨🇳

    In this work, we present the first lattice QCD study on the invisible decay $J/\psi \to \gamma \nu \bar{\nu }$. The calculation is accomplished using $N_f=2$ twisted mass fermion ensembles. The excited-state effects are observed and eliminated using a multi-state fit. The impact of finite-volume effects is also examined and confirmed to be well-controlled. After a continuous extrapolation under three lattice spacings, we obtain the branching fraction as $\mathrm{Br}[J/\psi \to \gamma \nu \bar{\nu }]=1.00(9)(7)\times 10^{-10}$, where the first error is the statistical error and the second is an estimate of the systematics. The exact theoretical prediction can be used to remove the only invisible contamination from the standard model background in searching for the possible dark matter by the channel $J/\psi \to \gamma +\text{invisible}$

    ↳ hep-lathep-exhep-phPoS(2024)·5 citations
17. 17*

    The large-$N$ limit of the chiral condensate from twisted reduced models

    Claudio Bonanno🇪🇸 · Pietro Butti🇪🇸 · Margarita García Peréz🇪🇸 · Antonio González-Arroyo🇪🇸 · Ken-Ichi Ishikawa🇯🇵 · Masanori Okawa🇯🇵

    We compute the large-$N$ limit of the QCD chiral condensate on the lattice using twisted reduced models, and performing controlled continuum and chiral extrapolations. We perform two different calculations: one consists in extracting the chiral condensate from the quark mass dependence of the pion mass, and the other consists in extracting the chiral condensate from the behaviour of the mode number of the Wilson-Dirac operator for small eigenvalues. We find consistency between the results of the two methods, giving a joint estimate of ${\lim }_{N\to \infty }\Sigma (N)/N=[184(13)$ MeV${]}^3$ ($\overline{\mathrm{MS}}$, $\mu =2$ GeV, taking the square root of the string tension $\sqrt{\sigma }=440$ MeV to set the scale), in remarkable agreement with the $\mathrm{SU}(3)$ 2-flavor FLAG result.

    ↳ hep-lathep-phhep-thJHEP(2023)·24 citations
18. 18*

    Hidden U(N) Symmetry behind N=1 Superamplitudes

    Antonio Delgado🇺🇸 · Adam Martin🇺🇸 · Runqing Wang🇺🇸

    In this paper we develop a Young diagram approach to constructing higher dimensional operators formed from massless superfields and their superderivatives in $\mathcal{N}=1$ supersymmetry. These operators are in one-to-one correspondence with non-factorizable terms in on-shell superamplitudes, which can be studied with massless spinor helicity techniques. By relating all spin-helicity variables to certain representations under a hidden $U(N)$ symmetry behind the theory, we show each non-factorizable superamplitude can be identified with a specific Young tableau. The desired tableau is picked out of a more general set of $U(N)$ tensor products by enforcing the supersymmetric Ward identities. We then relate these Young tableaux to higher dimensional superfield operators and list the rules to read operators directly from Young tableau. Using this method, we present several illustrative examples.

    ↳ hep-thhep-phJHEP(2023)·3 citations
19. 19*

    Induced gravitational waves from flipped SU(5) superstring theory at $\mathrm{nHz}$

    Spyros Basilakos🇬🇷 · Dimitri V. Nanopoulos🇺🇸 · Theodoros Papanikolaou🇮🇹 · Emmanuel N. Saridakis🇬🇷 · Charalampos Tzerefos🇬🇷

    The no-scale flipped SU(5) superstring framework constitutes a very promising paradigm for physics below the Planck scale providing us with a very rich cosmological phenomenology in accordance with observations. In particular, it can accommodate Starobinsky-like inflation, followed by a reheating phase, which is driven by a light "flaton" field, and during which the GUT phase transition occurs. In this Letter, we extract for the first time a gravitational-wave (GW) signal which naturally arises in the context of the flipped SU(5) cosmological phenomenology and is related to the existence of an early matter era (eMD) driven by the flaton field. Specifically, we study GWs non-linearly induced by inflationary perturbations and which are abundantly produced during a sudden transition from the flaton-driven eMD era to the late-time radiation-dominated era. Remarkably, we find a GW signal with a characteristic peak frequency $f_{\mathrm{GW},\mathrm{peak}}$ depending only on the string slope ${\alpha }^{\prime }$ and reading as $f_{\mathrm{GW},\mathrm{peak}}\propto 10^{-9}{\left(\frac{{\alpha }^{\prime }}{{\alpha }_{\ast }^{\prime }}\right)}^4\mathrm{Hz}$, where ${\alpha }_{\ast }^{\prime }$ is the fiducial string slope being related directly to the reduced Planck scale $M_{\mathrm{Pl}}$ as ${\alpha }_{\ast }^{\prime }=8/M_{\mathrm{Pl}}^2$. Interestingly enough, $f_{\mathrm{GW},\mathrm{peak}}$ lies within the $\mathrm{nHz}$ frequency range; hence rendering this primordial GW signal potentially detectable by SKA, NANOGrav and PTA probes at their very low frequency region of their detection bands.

    ↳ astro-ph.COgr-qchep-phhep-thPLB(2024)·39 citations
20. 20*

    Unification of Gravity and Internal Interactions

    Spyros Konitopoulos🇬🇷 · Danai Roumelioti🇬🇷 · George Zoupanos🇬🇷

    In the gauge theoretic approach of gravity, General Relativity is described by gauging the symmetry of the tangent manifold in four dimensions. Usually the dimension of the tangent space is considered to be equal to the dimension of the curved manifold. However, the tangent group of a manifold of dimension $d$ is not necessarily $S{O}_d$. It has been suggested earlier that by gauging an enlarged symmetry of the tangent space in four dimensions one could unify gravity with internal interactions. Here we consider such a unified model by gauging the $S{O}_{(1,17)}$ as the extended Lorentz group overcoming in this way some difficulties of the previous attempts of similar unification and eventually we obtain the $S{O}_{10}$ GUT, supplemented by an $S{U}_2\times S{U}_2$ global symmetry.

    ↳ hep-thhep-phFortsch.Phys.·19 citations
21. 21*

    $\mathcal{A}$-hypergeometric functions and creation operators for Feynman and Witten diagrams

    Francesca Caloro🇬🇧 · Paul McFadden🇬🇧

    Both Feynman integrals and holographic Witten diagrams can be represented as multivariable hypergeometric functions of a class studied by Gel'fand, Kapranov & Zelevinsky known as GKZ or $\mathcal{A}$-hypergeometric functions. Among other advantages, this formalism enables the systematic construction of highly non-trivial weight-shifting operators known as 'creation' operators. We derive these operators from a physics perspective, highlighting their close relation to the spectral singularities of the integral as encoded by the facets of the Newton polytope. Many examples for Feynman and Witten diagrams are given, including novel weight-shifting operators for holographic contact diagrams. These in turn allow momentum-space exchange diagrams of different operator dimensions to be related while keeping the spacetime dimension fixed. In contrast to previous constructions, only non-derivative vertices are involved.

    ↳ hep-thhep-phmath-phmath.MP17 citations
22. 22*

    Nonstationary Laguerre-Gaussian states in magnetic field

    G.K. Sizykh🇷🇺 · A.D. Chaikovskaia🇷🇺 · D.V. Grosman🇷🇺 · I.I. Pavlov · D.V. Karlovets🇷🇺

    The Landau states of electrons with orbital angular momentum in magnetic fields are important in the quantum theories of metals and of synchrotron radiation at storage rings, in relativistic astrophysics of neutron stars, and in many other areas. In realistic scenarios, electrons are often born inside the field or injected from a field-free region, requiring nonstationary quantum states to account for boundary or initial conditions. This study presents nonstationary Laguerre-Gaussian (NSLG) states in a longitudinal magnetic field, characterizing vortex electrons after their transfer from vacuum to the field. Comparisons with Landau states and calculations of observables such as mean energy and r.m.s. radius show that the r.m.s. radius of the electron packet in the NSLG state oscillates in time around a significantly larger value than that of the Landau state. This quantum effect of oscillations is due to boundary conditions and can potentially be observed in various problems, particularly when using magnetic lenses of electron microscopes and linear accelerators. Analogies are drawn between a quantum wave packet and a classical beam of many particles in phase space, including the calculation of mean emittance of the NSLG state as a measure of their quantum nature.

    ↳ quant-phhep-phphysics.acc-phphysics.opticsPTEP(2024)·8 citations
23. 23*

    Kaniadakis entropy-based characterization of IceCube PeV neutrino signals

    Massimo Blasone🇮🇹 · Gaetano Lambiase🇮🇹 · Giuseppe Gaetano Luciano🇪🇸

    Kaniadakis $\kappa$-thermostatistics is by now recognized as an effective paradigm to describe relativistic complex systems obeying power-law tailed distributions, as opposed to the classical (exponential-type) decay. It is founded on a non-extensive one-parameter generalization of the Bekenstein-Hawking entropy, which, in the cosmological framework, gives rise to modified Friedmann equations on the basis of the gravity-thermodynamic conjecture. Assuming the entropy associated with the apparent horizon of the Friedmann-Robertson-Walker (FRW) Universe follows Kaniadakis prescription, in this work we analyze the observed discrepancy between the present bound on the Dark Matter relic abundance and the IceCube high-energy ($\sim 1\mathrm{PeV}$) neutrinos. We show that this tension can be alleviated in the minimal model of Dark Matter decay with Kaniadakis-governed Universe evolution, while still considering the 4-dimensional Yukawa coupling between Standard Model and Dark Matter particles. This argument phenomenologically supports the need for a Kaniadakis-like generalization of the Boltzmann-Gibbs-Shannon entropy in the relativistic realm, opening new potential scenarios in high-energy astroparticle physics.

    ↳ physics.gen-phgr-qchep-phPhys.Dark Univ.(2023)·6 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.