Wed·Mar 20, 2024Wednesday·March 20, 2024

1. 01*

   An Imperative study of the angular observables in ${\Lambda }_b\to {\Lambda }_c^{+}(\to \Lambda {\pi }^{+}){\ell }^{-}{\bar{\nu }}_{\ell }$ decay and probing the footprint of new physics

   Soumitra Nandi🇮🇳 · Shantanu Sahoo🇮🇳 · Ria Sain🇮🇳

   We study the four-fold angular distribution of the semileptonic ${\Lambda }_b\to {\Lambda }_c^{+}(\to \Lambda {\pi }^{+}){\ell }^{-}{\bar{\nu }}_{\ell }$ decay and find out analytical expressions for various asymmetric and angular observables in the standard model (SM) and the relevant new physics (NP) scenarios. Using the available inputs on the form factors from the lattice, we predict the values with uncertainties of all these observables in the SM. We have considered NP effects only in $b\to c{\tau }^{-}{\bar{\nu }}_{\tau }$ transitions, and constrain the Wilson coefficients of the model-independent beyond the SM operators from the available data on $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c^{+}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays. In this study, we focus on analysing the contributions to these decays in one- and two-operator scenarios. Furthermore, we test the new physics sensitivities (one or two-operator scenarios) of the different angular and asymmetric observables in ${\Lambda }_b\to {\Lambda }_c^{+}(\to \Lambda {\pi }^{+}){\tau }^{-}{\bar{\nu }}_{\tau }$ decays and discuss the phenomenology. We observe that it will be possible to distinguish the different NP effects from one another by measuring these observables.

   hep-phhep-exJHEP(2024)·10 citations
2. 02*

   Photo-production of axions in Supernovae

   Sabyasachi Chakraborty🇮🇳 · Aritra Gupta🇪🇸 · Miguel Vanvlasselaer🇧🇪

   Compact stellar objects like supernovae and neutron stars are believed to cool by emitting axions predominantly via axion bremsstrahlung ($NN\to NNa$), pion conversion (${\pi }^{-}{p}^{+}\to Na$) and photo-production ($\gamma N\to Na$). In this paper, we study in detail the photo-production channel, from the unavoidable anomaly induced Wess-Zumino-Witten term $\propto {ϵ}^{\mu \nu \alpha \beta }{F}_{\mu \nu }{\partial }_{\alpha }a{\omega }_{\beta }$ in conjunction with the low energy pion photo-production data. We found that for heavier axions, i.e., $m_a\sim \mathcal{O}(100)$ MeV, photo-production processes can be dominant compared to the usual axion emission processes. In addition, the spectrum of axions emitted in the process is significantly harder than those originating from bremsstrahlung.

   hep-phastro-ph.HEPRD(2024)·20 citations
3. 03*

   Atomic binding corrections for high energy fixed target experiments

   Ryan Plestid🇺🇸 · Mark B. Wise🇺🇸

   High energy beams incident on a fixed target may scatter against atomic electrons. To a first approximation, one can treat these electrons as at rest. For precision experiments, however, it is important to be able to estimate the size of, and when necessary calculate, sub-leading corrections. We discuss atomic binding corrections to relativistic lepton-electron scattering. We analyze hydrogen in detail, before generalizing our analysis to multi-electron atoms. Using the virial theorem, and many-body sum rules, we find that the corrections can be reduced to measured binding energies, and the expectation value of a single one-body operator. We comment on the phenomenological impact for neutrino flux normalization and an extraction of hadronic vacuum polarization from elastic muon electron scattering at MUonE.

   hep-phhep-exphysics.atom-phPRD(2024)·15 citations
4. 04*

   Fast flavor conversions at the edge of instability in a two-beam model

   Damiano F. G. Fiorillo🇩🇰 · Georg Raffelt🇩🇪

   A dense neutrino gas exhibiting angular crossings in the electron lepton number is unstable and develops fast flavor conversions. Instead of assuming an unstable configuration from the onset, we imagine that the system is externally driven toward instability. We use the simplest model of two neutrino beams initially of different flavor that either suddenly appear or one or both slowly build up. Flavor conversions commence well before the putative unstable state is fully attained, and the final outcome depends on how the system is driven. The system generally sticks to the closest state that is linearly stable, a conclusion that we prove for the first time using quasilinear theory. Our results suggest that in an astrophysical setting, one should focus less on flavor instabilities in the neutrino radiation field and more on the external dynamics that leads to the formation of the unstable state.

   hep-phastro-ph.HEPRL(2024)·53 citations
5. 05*

   QCD effects in electroweak $WZjj$ production at current and future hadron colliders

   Barbara Jäger🇩🇪 · Alexander Karlberg🇨🇭 · Simon Reinhardt🇩🇪

   We present an update of an existing implementation of $WZjj$ production via vector-boson scattering in the framework of the POWHEG BOX program. In particular, previously unavailable semi-leptonic and fully hadronic decay modes of the intermediate vector bosons are provided, and operators of dimension six in an effective-field theory approach to account for physics beyond the Standard Model in the electroweak sector are included. For selected applications phenomenological results are provided to illustrate the capabilities of the new program. The impact of the considered dimension-six operators on experimentally accessible distributions is found to be small for current LHC energies, but enhanced in the kinematic reach of a potential future hadron collider with an energy of 100 TeV. The relevance of fully accounting for spin correlations and off-shell effects in the decay system is explored by a comparison with results obtained with the MadSpin tool that are based on an approximate treatment of the leptonic final state resulting from vector boson scattering processes. For selected semi-leptonic and hadronic decay modes we demonstrate the sensitivity of realistic signal selection procedures on QCD corrections and parton-shower effects.

   hep-phhep-exEPJC(2024)·9 citations
6. 06*

   The Amaterasu Cosmic Ray as a Magnetic Monopole and Implications for Extensions of the Standard Model

   Paul H. Frampton🇮🇹 · Thomas W. Kephart🇺🇸

   The Amaterasu cosmic ray particle appears to have come from the direction of the local cosmic void. We take this as evidence that it is a magnetic monopole rather than a proton or nucleus. This in turn strongly suggests physics at high energy is described by a quiver gauge theory.

   hep-phastro-ph.HEPLB(2024)·14 citations
7. 07*

   Revisiting the Dirac Nature of Neutrinos in the Light of $\Delta (27)$ and Cyclic Symmetries

   Manash Dey🇮🇳 · Subhankar Roy🇮🇳

   Amid the uncertainty regarding the fundamental nature of neutrinos, we adhere to the Dirac description, and construct a model in the framework of $\Delta (27)$ symmetry. The model successfully accounts for the hierarchical patterns of both charged lepton and neutrino masses. The neutrino mass matrix exhibits four texture zeroes, and the associated mixing scheme aligns with the experimental data, notably controlled by a single parameter.

   hep-phJ.Phys.G(2025)·11 citations
8. 08*

   Scalar dark matter explanation of the excess in the Belle II $B^{+}\to K^{+}+$ invisible measurement

   Xiao-Gang He🇨🇳 · Xiao-Dong Ma🇨🇳 · Michael A. Schmidt🇦🇺 · German Valencia🇦🇺 · Raymond R. Volkas🇦🇺

   Recently Belle II reported the first measurement of $B^{+}\to K^{+}+\mathrm{invisible}(\mathrm{inv})$, which is $2.7\sigma$ above the standard model (SM) prediction. If confirmed, this calls for new physics beyond SM. In the SM, the invisible particles are neutrino-anti-neutrino pairs. There are more possibilities when going beyond the SM. In this work, we focus on decays to dark matter (DM) and show that the $B\to K+\mathrm{inv}$ excess from Belle II and DM relic density can be simultaneously explained in a simple extension of the SM. The model introduces a real scalar singlet $\varphi$ acting as a DM candidate, and two heavy vector-like quarks $Q,D$ with the same quantum numbers as the SM left-handed quark doublet and right-handed down-type quark singlet, respectively. All these new particles are odd under a ${\mathbb{Z}}_2$ symmetry while the SM particles are even. The model can successfully explain the Belle II anomaly and DM relic density for TeV-scale heavy quarks with hierarchical Yukawa couplings involving $b$ and $s$ quarks. At the same time, it can easily satisfy other flavour physics constraints. Direct detection searches utilizing the Migdal effect constrain some of the parameter space.

   hep-phJHEP(2024)·53 citations
9. 09*

   Polarization Dynamics in Paramagnet of Charged Quark-Gluon Plasma

   Lihua Dong🇨🇳 · Shu Lin🇨🇳

   It is commonly understood that the strong magnetic field produced in heavy ion collisions is short-lived. The electric conductivity of the quark-gluon plasma is unable to significantly extend the life time of magnetic field. We propose an alternative scenario to achieve this: with finite baryon density and spin polarization by the initial magnetic field, the quark-gluon plasma behaves as a paramagnet, which may continue to polarize quark after fading of initial magnetic field. We confirm this picture by calculations in both quantum electrodynamics and quantum chromodynamics. In the former case, we find a splitting in the damping rates of probe fermion with opposite spin component along the magnetic field. In the latter case, we find a similar splitting in damping rate of probe quark in quark-gluon plasma in both high density and low density limits. The splitting provides a way of polarizing strange quarks by the quark-gluon plasma paramagnet consisting of light quarks, which effectively extends the lifetime of magnetic field in heavy ion collisions.

   hep-phPRD(2024)·1 citation
10. 10*

    All-order Feynman rules for leading-twist gauge-invariant operators in QCD

    G. Somogyi🇭🇺 · S. Van Thurenhout🇭🇺

    We present the Feynman rules for leading-twist gauge-invariant quark and gluon operators with an arbitrary number of total derivatives and applicable to any order in perturbation theory. This generalizes previous results and constitutes a necessary ingredient in the computation of the matrix elements of the corresponding operators. The results are written in a form appropriate for implementation in a computer algebra system. To illustrate the latter we provide implementations in Mathematica and FORM, which are made available at https://github.com/vtsam/NKLO.

    hep-phhep-thEPJC(2024)·2 citations
11. 11*

    The structure of the f_0(980) from system size dependent hadronic resonance ratios in p+p, p+Pb, and Pb+Pb collisions at the LHC

    Tom Reichert🇩🇪 · Jan Steinheimer🇩🇪 · Volodymyr Vovchenko🇺🇸 · Christoph Herold🇹🇭 · Ayut Limphirat🇹🇭 · Marcus Bleicher🇩🇪

    It is shown that the hadronic phase in ultra-relativistic heavy ion collisions can be used to understand the properties of the $f_0(980)$ resonance. In particular it is shown that the centrality dependence of the $f_0(980)/\pi$ and $f_0(980)/\varphi$ ratios depends strongly on the $f_0(980)\to \overline{K}+K$ branching ratio and whether the $f_0(980)$ is produced as a $|\overline{q}q⟩$ or $|\overline{s}s⟩$ state. These conclusions are drawn from calculations within the partial chemical equilibrium of the HRG model within Thermal-FIST as well as with the fully non-equilibrium hybrid-transport approach UrQMD. Our findings show how the hadronic phase in heavy ion collisions can be used for studies of exotic hadron properties otherwise possible only in dedicated experiments such as PANDA.

    hep-phnucl-thEPJC(2024)·3 citations
12. 12*

    Compositeness of near-threshold $s$-wave resonances

    Tomona Kinugawa🇯🇵 · Tetsuo Hyodo🇯🇵

    The near-threshold clustering phenomenon is well understood by the low-energy universality, for shallow bound states below the threshold. Nevertheless, the characteristics of resonances slightly above the threshold still lack thorough elucidation. We introduce a novel probabilistic interpretation scheme for complex compositeness of resonances, in which resonances with large decay widths fall outside the domain where their internal structure can be interpreted probabilistically. Employing this scheme to analyze resonances via the effective range expansion, we demonstrate that near-threshold resonances have a small composite fraction, in sharp contrast to shallow bound states below the threshold.

    hep-phnucl-th16 citations
13. 13*

    Mass spectra of heavy hybrid quarkonia and $\overline{b}gc$ mesons

    A. Alaakol🇹🇷 · S. S. Agaev🇦🇿 · K. Azizi🇮🇷 · H. Sundu🇹🇷

    Masses and current couplings of the charmonium and bottomonium hybrids $\overline{c}gc$ and $\overline{b}gb$ with spin-parities $J^{\mathrm{PC}}=0^{++},0^{+-},0^{-+},0^{--}$ and $1^{++},1^{+-},1^{-+},1^{--}$ are calculated using QCD two-point sum rule method. Computations are performed by taking into account gluon condensates up to dimension 12 including terms $\sim ⟨g_s^3{G}^3{⟩}^2$. The parameters of the bottom-charm hybrids $\overline{b}gc$ with quantum numbers $J^{\mathrm{PC}}=0^{+},0^{-},1^{+}$, and $1^{-}$ are calculated as well. In computations the dominance of the pole contribution to sum rule results is ensured. It is demonstrated that all charmonia hybrids decay strongly to two-meson final states. The bottomonium hybrids $0^{-+}$ and $1^{-+}$ as well as the bottom-charm hybrid mesons $0^{-(+)}$ and $1^{-(+)}$ may be stable against strong two-meson decay modes. Results of the present work are compared with ones obtained using the sum rule and alternative approaches. Our predictions for parameters of the heavy hybrid mesons may be useful to study their various decay channels which are important for interpretation of ongoing and future experiments.

    hep-phhep-exhep-latPLB(2024)·7 citations
14. 14*

    $J/\psi$ production within a jet in high-energy proton-proton and nucleus-nucleus collisions

    Shan-Liang Zhang🇨🇳 · Hongxi Xing🇨🇳

    Within the framework of leading power factorization formalism of nonrelativistic quantum chromodynamics, we calculate the jet fragmentation function for $J/\psi$ production in proton-proton (pp) collisions ranging from $\sqrt{s}=500$ GeV to $13$ TeV. The reasonable agreements between theory and experimental data indicate that $J/\psi$ production within a jet is mainly dominated by gluon fragmentation. Such a mechanism can be further tested by the predicted jet transverse momentum and radius dependence of jet fragmentation function. Based on the satisfying description of pp baseline, we carry out the first theoretical investigation on medium modification on $J/\psi$ production within jet in heavy-ion collisions at the Large Hadron Collider, using a linear Boltzmann transport model combined with hydrodynamics for the simulation of jet-medium interaction. The consistency with the experimental measurement on nuclear modification factor $R_{\text{AA}}$ by CMS collaboration reveals that the gluon jet quenching is the driving force for the suppression of $J/\psi$ production in jet. Furthermore, we make predictions for the dependence of $R_{\text{AA}}$ on the jet transverse momentum and jet radius $R$, which can be tested in future measurements to further constrain the flavor dependence of jet quenching.

    hep-phhep-exnucl-exnucl-thPLB(2025)·8 citations
15. 15*

    Extraction of trans-helicity worm-gear distributions and opportunities at the Electron-Ion Collider in China

    Ke Yang🇨🇳 · Tianbo Liu🇨🇳 · Peng Sun🇨🇳 · Yuxiang Zhao🇨🇳 · Bo-Qiang Ma🇨🇳

    We present a global analysis of the trans-helicity worm-gear distribution function, $g_{1T}^{\perp }$, by fitting the longitudinal-transverse double spin asymmetry data of the semi-inclusive deep inelastic scattering. The analysis is performed within the framework of transverse momentum dependent factorization and evolution. It is found that the $u$-quark favors a positive distribution and the $d$-quark favors a negative distribution, which is consistent with previous model calculations and phenomenological extractions. Based on the fit to existing world data, we also study the impact of the proposed electron-ion collider in China and conclude that it can significantly improve the precision of the worm-gear distribution function and hence enhance our understanding of nucleon spin structures.

    hep-phhep-exnucl-thPRD(2024)·6 citations
16. 16*

    $B$ Physics: From Present to Future Colliders

    Monika Blanke🇩🇪

    These proceedings provide a brief overview of the status of $B$ meson physics, putting particular emphasis on precision tests of the Standard Model with meson mixing data, and on the anomalies in charged- and neutral-current semileptonic $B$ decays. In addition to summarising the current status, some promising directions to be pursued at future collider experiments are highlighted.

    hep-phPoS(2024)·0 citations
17. 17*

    Model-independent predictions for decays of hidden-heavy hadrons into pairs of heavy hadrons

    E. Braaten🇺🇸 · R. Bruschini🇺🇸

    Hidden-heavy hadrons can decay into pairs of heavy hadrons through transitions from confining Born-Oppenheimer potentials to hadron-pair potentials with the same Born-Oppenheimer quantum numbers. The transitions are also constrained by conservation of angular momentum and parity. From these constraints, we derive model-independent selection rules for decays of hidden-heavy hadrons into pairs of heavy hadrons. The coupling potentials are expressed as sums of products of Born-Oppenheimer transition amplitudes and angular-momentum coefficients. If there is a single dominant Born-Oppenheimer transition amplitude, it factors out of the coupling potentials between hidden-heavy hadrons in the same Born-Oppenheimer multiplet and pairs of heavy hadrons in specific heavy-quark-spin-symmetry doublets. If furthermore the kinetic energies of the heavy hadrons are much larger than their spin splittings, we obtain analytic expressions for the relative partial decay rates in terms of Wigner 6-j and 9-j symbols. We consider in detail the decays of quarkonia and quarkonium hybrids into the lightest heavy-meson pairs. For quarkonia, our model-independent selection rules and relative partial decay rates agree with previous results from quark-pair-creation models in simple cases and give stronger results in other cases. For quarkonium hybrids, we find disagreement even in simple cases.

    hep-phPRD(2024)·19 citations
18. 18*

    Unitarity constraints on large multiplets of arbitrary gauge groups

    André Milagre🇵🇹 · Luís Lavoura🇵🇹

    We impose partial-wave unitarity on $2\to 2$ tree-level scattering processes to derive constraints on the dimensions of large scalar and fermionic multiplets of arbitrary gauge groups. We apply our results to scalar and fermionic extensions of the Standard Model, and also to the Grand Unified Theories (GUTs) based on the groups $SU(5)$, $SO(10)$, and $E_6$. We find scenarios within the latter two GUTs that violate the unitarity condition; this may require a reevaluation of the validity of perturbation theory in those scenarios.

    hep-phNPB(2024)·14 citations
19. 19*

    GKZ hypergeometric systems of the four-loop vacuum Feynman integrals

    Hai-Bin Zhang🇨🇳 · Tai-Fu Feng🇨🇳

    Basing on Mellin-Barnes representations and Miller's transformation, we present the Gel'fand-Kapranov-Zelevinsky (GKZ) hypergeometric systems of 4-loop vacuum Feynman integrals with arbitrary masses. Through the GKZ hypergeometric systems, the analytical hypergeometric solutions of 4-loop vacuum Feynman integrals with arbitrary masses can be obtained in neighborhoods of origin including infinity. The analytical expressions of Feynman integrals can be formulated as a linear combination of the fundamental solution systems in certain convergent region, which the combination coefficients can be determined by the integral at some regular singularities, the Mellin-Barnes representation of the integral, or some mathematical methods.

    hep-phhep-thJHEP(2025)·2 citations
20. 20*

    CP-odd window into long distance dynamics in rare semileptonic $B$ decays

    Jernej F. Kamenik🇸🇮 · Nejc Košnik🇸🇮 · Martín Novoa-Brunet🇪🇸

    We consider the combined measurements of CP-averaged decay rates and direct CP asymmetries of $B^{\pm }\to K^{\pm }{\ell }^{+}{\ell }^{-}$ and $B^{\pm }\to {\pi }^{\pm }{\ell }^{+}{\ell }^{-}$ to probe (non-local) four-quark operator matrix element contributions to rare semileptonic B meson decays. We also explore how their effects could be in principle disentangled from possible local new physics effects using $U$-spin relations. To this end, we construct a ratio of CP-odd decay rate differences which are exactly predicted within the standard model in the $U$-spin limit, while the leading $U$-spin breaking effects can also be systematically calculated. Our results motivate binned measurements of the direct CP asymmetry in $B^{\pm }\to {\pi }^{\pm }{\ell }^{+}{\ell }^{-}$ as well as dedicated theoretical estimates of $U$-spin breaking both in local form factors as well as in four-quark matrix elements.

    hep-phhep-exPRD(2024)·3 citations
21. 21*

    Cosmic Purity Lost: Perturbative and Resummed Late-Time Inflationary Decoherence

    C.P. Burgess🇨🇦 · Thomas Colas🇬🇧 · R. Holman🇺🇸 · Greg Kaplanek🇨🇦 · Vincent Vennin🇫🇷

    We compute the rate with which unobserved fields decohere other fields to which they couple, both in flat space and in de Sitter space, for spectator scalar fields prepared in their standard adiabatic vacuum. The process is very efficient in de Sitter space once the modes in question pass outside the Hubble scale, displaying the tell-tale phenomenon of secular growth that indicates the breakdown of perturbative methods on a time scale parameterically long compared with the Hubble time. We show how to match the perturbative evolution valid at early times onto a late-time Lindblad evolution whose domain of validity extends to much later times, thereby allowing a reliable resummation of the perturbative result beyond the perturbative regime. Super-Hubble modes turn out to be dominantly decohered by unobserved modes that are themselves also super-Hubble. Although our calculation is done for spectator fields, if applied to curvature perturbations during inflation our observations here could close a potential loophole in recent calculations of the late-time purity of the observable primordial fluctuations.

    ↳ gr-qcastro-ph.COhep-phhep-thJCAP(2024)·52 citations
22. 22*

    Bounds on the photon mass via the Shapiro effect in the solar system

    P. C. Malta🇧🇷 · C. A. D. Zarro🇧🇷

    We study the effects of a finite mass for the photon on its propagation in a weak gravitational field. In particular, we analyse the gravitational time delay, also known as the Shapiro effect. We work in isotropic coordinates in the weak-field limit and find that the mass-dependent corrections enhance the gravitational time delay. Doppler-tracking data from the Cassini mission allow us to set an upper bound on the photon mass, namely $m_{\gamma }<4.9\times 10^{-7}eV/{\mathrm{c}}^2$ at $95\%$ CL. We also discuss next-generation solar-system tests of general relativity that could improve this upper limit, potentially by a factor of ten. Though not competitive with the currently best limits, our bound is at the ballpark of earlier ones based on the gravitational bending of light by the Sun.

    ↳ gr-qchep-phPRD(2024)·2 citations
23. 23*

    First Measurement of the ${\nu }_e$ and ${\nu }_{\mu }$ Interaction Cross Sections at the LHC with FASER's Emulsion Detector

    FASER Collaboration: Roshan Mammen Abraham🇺🇸 · John Anders🇨🇭 · Claire Antel🇨🇭 · Akitaka Ariga🇨🇭 · Tomoko Ariga🇯🇵 · Jeremy Atkinson🇨🇭 · Florian U. Bernlochner🇩🇪 · Tobias Boeckh🇩🇪 · Jamie Boyd🇨🇭 · Lydia Brenner🇳🇱 · Angela Burger🇨🇭 · Franck Cadoux🇨🇭 and 92 other authors

    This paper presents the first results of the study of high-energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion/tungsten detector of the FASER experiment at the LHC. A subset of the FASER$\nu$ volume, which corresponds to a target mass of 128.6~kg, was exposed to neutrinos from the LHC $pp$ collisions with a centre-of-mass energy of 13.6~TeV and an integrated luminosity of 9.5 fb${}^{-1}$. Applying stringent selections requiring electrons with reconstructed energy above 200~GeV, four electron neutrino interaction candidate events are observed with an expected background of $0.025_{-0.010}^{+0.015}$, leading to a statistical significance of 5.2$\sigma$. This is the first direct observation of electron neutrino interactions at a particle collider. Eight muon neutrino interaction candidate events are also detected, with an expected background of $0.22_{-0.07}^{+0.09}$, leading to a statistical significance of 5.7$\sigma$. The signal events include neutrinos with energies in the TeV range, the highest-energy electron and muon neutrinos ever detected from an artificial source. The energy-independent part of the interaction cross section per nucleon is measured over an energy range of 560--1740 GeV (520--1760 GeV) for ${\nu }_e$ (${\nu }_{\mu }$) to be $(1.2_{-0.7}^{+0.8})\times 10^{-38}{\mathrm{cm}}^2{\mathrm{GeV}}^{-1}$ ($(0.5\pm 0.2)\times 10^{-38}{\mathrm{cm}}^2{\mathrm{GeV}}^{-1}$), consistent with Standard Model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.

    ↳ hep-exhep-phphysics.ins-detPRL(2024)·87 citations
24. 24*

    Effective Metric Descriptions of Quantum Black Holes

    Manuel Del Piano🇮🇹 · Stefan Hohenegger🇫🇷 · Francesco Sannino🇮🇹

    In a recent work [arXiv:2307.13489 [gr-qc]], we have described spherically symmetric and static quantum black holes as deformations of the classical Schwarzschild metric that depend on the physical distance to the horizon. We have developed a framework that allows to compute the latter in a self-consistent fashion from the deformed geometry, in the vicinity of the horizon. However, in this formalism, the distance can be replaced by other physical quantities, e.g. curvature invariants such as the Ricci- or Kretschmann scalar. Here, we therefore define a more general framework, which we call an "effective metric description" (EMD), that captures the deformed geometry based on a generic physical quantity. We develop in detail the Ricci- and Kretschmann scalar EMD, in particular demonstrating how to compute the geometry in a self-consistent manner. Moreover, we provide explicit relations that allow to express one EMD in terms of the others, thus demonstrating their equivalence.

    ↳ gr-qchep-phhep-thEPJC(2024)·12 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.