Thu·Apr 27, 2023Thursday·April 27, 2023

1. 01*

   The chiral limit of a fermion-scalar $(1/2{)}^{+}$ system in covariant gauges

   A. Noronha🇧🇷 · W. de Paula🇧🇷 · J.H. de Alvarenga Nogueira🇧🇷 · T. Frederico🇧🇷 · E. Pace🇮🇹 · G. Salmè🇮🇹

   The homogeneous Bethe-Salpeter equation (BSE) of a (1/2)${}^{+}$ bound system, that has both fermionic and bosonic degrees of freedom, that we call a {\em mock nucleon}, is studied in Minkowski space, in order to analyse the chiral limit in covariant gauges. After adopting an interaction kernel built with a one-particle exchange, the $\chi$-BSE is numerically solved by means of the Nakanishi integral representation and light-front projection. Noteworthy, the chiral limit induces a scale-invariance of the model and consequently generates a wealth of striking features: i) it reduces the number of non trivial Nakanishi weight functions to only one; ii) the form of the surviving weight function has a factorized dependence on the two relevant variables, compact and non-compact one; iii) the coupling constant becomes an explicit function of the real exponent governing the power-law fall-off of the non trivial Nakanishi weight function. The thorough investigation at large transverse-momentum of light-front Bethe-Salpeter amplitudes, obtained with massive constituents, provides a confirmation of the expected universal power-law fall-off, with exponents predicted by our non-perturbative framework. Finally, one can shed light on the exponents that govern the approach to the upper extremum of the longitudinal-momentum fraction distribution function of the {\em mock nucleon}, when the coupling constant varies.

   hep-phhep-thnucl-thPRD(2023)·2 citations
2. 02*

   Direct detection of finite-size dark matter via electron recoil

   Wenyu Wang🇨🇳 · Wu-Long Xu🇨🇳 · Jin Min Yang🇨🇳

   In direct dark matter (DM) detection via scattering off the electrons, the momentum transfer plays a crucial role. Previous work showed that for self-interacting DM, if the DM particle has a size (the so-called puffy DM), the radius effect could dominate the momentum transfer and become another source of velocity dependence for self-scattering cross section. In this work we investigate the direct detection of puffy DM particles with different radii through electron recoil. We find that comparing with the available experimental exclusion limits dominated by the mediator effect for XENON10, XENON100 and XENON1T, the constraints on the puffy DM-electron scattering cross-section become much weaker for large radius DM particles. For small-radius DM particles, the constraints remain similar to the point-like DM case.

   hep-phastro-ph.COhep-exInt.J.Mod.Phys.A(2023)·12 citations
3. 03*

   Quasi-two-body decays $B_c\to D^{\ast }h\to D\pi h$ in the perturbative QCD

   Yan-Chao Zhao🇨🇳 · Zhi-Qing Zhang🇨🇳 · Zi-Yu Zhang🇨🇳 · Zhi-Jie Sun🇨🇳 · Qiu-Bo Meng🇨🇳

   In this work, we investigate the quasi-two-body decays $B_c\to D^{\ast }h\to D\pi h$ with $h=(K^0,{\pi }^0,\eta ,{\eta }^{\prime })$ using the perturbative QCD(PQCD) approach. The description of final state interactions between the $D\pi$ pair is achieved through the two-meson distribution amplitudes(DAs), which are normalized to the time-like form factor. The PQCD predictions on the branching ratios of the quasi-two-body decays $B_c\to D^{\ast }h\to D\pi h$ show an obvious hierarchy: $Br(B_c^{+}\to D^{\ast +}{K}^0\to D^0{\pi }^{+}{K}^0)=({5.22}_{-0.74}^{+0.86})\times {10}^{-6},Br(B_c^{+}\to D^{\ast +}{\pi }^0\to D^0{\pi }^{+}{\pi }^0)=(0.93\pm 0.26)\times {10}^{-7},Br(B_c^{+}\to D^{\ast +}\eta \to D^0{\pi }^{+}\eta )=({2.83}_{-0.52}^{+0.59})\times {10}^{-8}$ and $Br(B_c^{+}\to D^{\ast +}{\eta }^{\prime }\to D^0{\pi }^{+}{\eta }^{\prime })=({1.89}_{-0.36}^{+0.40})\times {10}^{-8}$. From the invariant mass $m_{D\pi }$-dependence of the decay spectrum for each channel, one can find that the branching fraction is concentrated in a narrow region around the $D^{\ast }$ pole mass. So one can obtain the branching ratios for the corresponding two-body decays $B_c\to D^{\ast +}h$ under the narrow width approximation. We find that the branching ratios of the decays $B_c\to D^{\ast +}h$ are consistent well with the previous PQCD calculations within errors. These predictions will be tested by the future experiments.

   hep-phCPC(2023)·5 citations
4. 04*

   Determination of neutrino mass ordering from Supernova neutrinos with T2HK and DUNE

   Papia Panda🇮🇳 · Monojit Ghosh🇭🇷 · Rukmani Mohanta🇮🇳

   In this paper, we study the possibility of determining the neutrino mass ordering from the future supernova neutrino events at the DUNE and T2HK detectors. We estimate the expected number of neutrino event rates from a future supernova explosion assuming Garching flux model corresponding to different processes that are responsible for detecting the supernova neutrinos at these detectors. We present our results in the form of ${\chi }^2$, as a function of supernova distance. For a systematic uncertainty of 5\% in normalisation as well as energy calibration error, our results show that, the neutrino mass ordering can be determined at $5\sigma$ C.L. if the supernova explosion occurs at a distance of 42.7 kpc for T2HK and at a distance of 15.2 kpc for DUNE. Our results also show that the sensitivity of DUNE and T2HK get affected by the systematic uncertainties for the smaller supernova distances. Further, we show that in both DUNE and T2HK, the sensitivity gets deteriorated to some extent due to presence of energy smearing of the neutrino events. This occurs because of the reconstruction of the neutrino energy from the energy-momentum measurement of the outgoing leptons at the detector.

   hep-phJCAP(2023)·8 citations
5. 05*

   Exploring CP-violation in $Y=0$ inert triplet with real singlet

   Shilpa Jangid🇰🇷 · Hiroshi Okada🇰🇷

   In this article, we examine the Standard Model extended with a $Y=0$ Higgs triplet and a real singlet. We consider the Higgs triplet to be odd under the $Z_2$ symmetry, and hence the lightest stable particle from the inert triplet becomes the dark matter candidate, whereas the real singlet is considered to be even under the $Z_2$ symmetry. A dimension-5 effective term is introduced with the help of a real singlet, which breaks the CP symmetry and gives an additional source of CP-violation in the fermion sector. The phase transition proceeds in two-steps, with the symmetry breaking in the singlet direction occurring first and later leading to the usual electroweak symmetry breaking minima, while electroweak baryogenesis is associated with the second step. The parameters chosen for the electroweak phase transition are found to be consistent with the Planck scale stability and the perturbativity using two-loop $\beta$-functions. The DM mass bound for inert triplet, i.e., 1.2 TeV (below which it is under abundance), also comes out to be consistent with the strongly first-order phase transition, which was not possible solely with inert triplet. The upper bound on the triplet mass comes out to be $\le 3.8$ TeV, which satisfies the strongly first-order phase transition. This particular benchmark point also satisfies the correct baryon asymmetry of the Universe $(6.13\times 10^{-11})$, and the gravitational wave spectrum also lies within the detectable frequency range of LISA $(6.978\times 10^{-4}-1.690\times 10^{-2})$ Hz and BBO $(2.80\times 10^{-3}-1.096)$ Hz experiments.

   hep-phPRD(2023)·6 citations
6. 06*

   Muon anomalous magnetic dipole moment in a low scale type I see-saw model

   D. N. Dinh🇻🇳

   Recent experimental results on muon anomalous magnetic dipole moment have shown a $4.2\sigma$ tension with the SM prediction, which has blown a fresh wind into the elementary particle physics community. The problem is believed to be explained only by physics beyond the standard model. Current work considers the anomalous moment in a scenario of models with mirror symmetry and type I see-saw mechanism at low energy scale of electroweak interactions. After a brief introduction to the model, a detailed numerical analysis of muon anomalous phenomenology will be carefully performed. Analysis results show that the model is not successful in explaining the muon moment problem, however the contributions of channels involving neutral Higgs scalars, including both the light and heavy ones, might provide sizable corrections to the discrepancy.

   hep-phhep-exNPB(2023)·2 citations
7. 07*

   Quark and lepton model with flavor specific dark matter and muon $g-2$ in modular $A_4$ and hidden $U(1)$ symmetries

   Takaaki Nomura🇨🇳 · Hiroshi Okada🇰🇷

   We propose a quark and lepton model explaining their masses, mixings, and CP violating phases, introducing modular $A_4$ and hidden gauged $U(1)$ symmetries. The hidden $U(1)$ brings us heavier Majorana fermions that are requested by chiral anomaly cancellations, and we work on a canonical seesaw scenario due to their neutral particles.In this framework, we search for favorite parameter space to satisfy both the experimental values and show predictions, applying the $\chi$ square analysis.Then, we discuss a bosonic dark matter candidate that only annihilates into muon state due to the modular $A_4$ flavor symmetry where we suppose the main interaction of dark matter to be Yukawa terms. And we study muon anomalous magnetic dipole moment where there are not any constraints of lepton flavor violations thanks to this flavor symmetry. Finally, we show the allowed space to satisfy the observed relic density of dark matter and the muon anomalous magnetic dipole moment.

   hep-phPhys.Dark Univ.(2025)·17 citations
8. 08*

   Rational Function Simplification for Integration-by-Parts Reduction and Beyond

   Kirill Mokrov🇷🇺 · Alexander Smirnov🇷🇺 · Mao Zeng🇬🇧

   We present FUEL (Fractional Universal Evaluation Library), a C++ library for performing rational function arithmetic with a flexible choice of third-party computer algebra systems as simplifiers. FUEL is an outgrowth of a C++ interface to Fermat which was originally part of the FIRE code for integration-by-parts (IBP) reduction for Feynman integrals, now promoted to be a standalone library and with access to simplifiers other than Fermat. We compare the performance of various simplifiers for standalone benchmark problems as well as IBP reduction runs with FIRE. A speedup of more than 10 times is achieved for an example IBP problem related to off-shell three-particle form factors in $\mathcal{N}=4$ super-Yang-Mills theory.

   hep-phNumerical Methods and Programming 24(4) 3…·9 citations
9. 09*

   Neutrino Oscillations by a Manifestly Coherent Mechanism and Massless vs. Massive Neutrinos

   Anca Tureanu🇫🇮

   The neutrino oscillations in vacuum are derived in a manifestly coherent scheme. The mechanism is operative in a quantum field theoretical framework, justifying nevertheless a formal analogy with quantum mechanical two- (or more) level systems and their oscillatory behaviour. Both the flavour states and the massive states are eigenstates of certain Hamiltonians which, in special conditions, can be argued to share the same Hilbert space. In this scheme, flavour neutrinos are massless and play the role of asymptotic states for any interactions, including the weak interactions, while massive neutrinos are effective propagation states. The vacuum is interpreted as a medium, where the flavour neutrinos undergo coherent forward scatterings which modify their energy and mix their flavour. The treatment of matter conversion and MSW effect fits in naturally; the extension to other neutral particle oscillations, like $K_0-{\bar{K}}_0$, is straightforward. The scheme is eclectic insofar as it combines seamlessly quantum field theory and quantum mechanics.

   hep-phPLB(2023)·4 citations
10. 10*

    Fingerprinting the Type-Z three Higgs doublet models

    Rafael Boto🇵🇹 · Dipankar Das🇮🇳 · Luis Lourenco🇵🇹 · Jorge C. Romao🇵🇹 · Joao P. Silva🇵🇹

    There has been great interest in a model with three Higgs doublets in which fermions with a particular charge couple to a single and distinct Higgs field. We study the phenomenological differences between the two common incarnations of this so-called Type-Z 3HDM. We point out that the differences between the two models arise from the scalar potential only. Thus we focus on observables that involve the scalar self-couplings. We find it difficult to uncover features that can uniquely set apart the $Z_3$ variant of the model. However, by studying the dependence of the trilinear Higgs couplings on the nonstandard masses, we have been able to isolate some of the exclusive indicators for the $Z_2\times Z_2$ version of the Type-Z 3HDM. This highlights the importance of precision measurements of the trilinear Higgs couplings.

    hep-phPRD(2023)·12 citations
11. 11*

    Heavy- and light-flavor symmetry partners of the $T_{cc}^{+}(3875)$, the $X(3872)$ and the $X(3960)$ from light-meson exchange saturation

    Fang-Zheng Peng🇨🇳 · Mao-Jun Yan🇨🇳 · Manuel Pavon Valderrama🇨🇳

    The spectrum of the charmed meson-(anti)meson system is a fundamental tool for disentangling the nature of a few exotic hadrons, including the recently discovered $T_{cc}^{+}(3875)$ tetraquark, the $X(3960)$, or the $X(3872)$, the nature of which is still not clear after almost two decades of its discovery. Here we consider that the charmed meson-(anti)meson short-range interaction is described by the exchange of light-mesons ($\sigma$, $\rho$, $\omega$). The effects of light-meson exchanges are recast into a simple contact-range theory by means of a saturation procedure, resulting in a compact description of the two-hadron interaction. From this, if the $T_{cc}^{+}$ were to be an isoscalar $D^{\ast }D$ molecule, then there should exist an isoscalar $J=1$ $D^{\ast }{D}^{\ast }$ partner, as constrained by heavy-quark spin symmetry. Yet, within our model, the most attractive two charmed meson configurations are the isovector $J=0$ $D^{\ast }{D}^{\ast }$ molecule and its sextet $D_s^{\ast }{D}^{\ast }$ and $D_s^{\ast }{D}_s^{\ast }$ flavor partners. Finally, we find a tension between the molecular descriptions of the $T_{cc}^{+}$ and that of the $X(3872)$ and $X(3960)$, where most parameter choices suggest that if the $T_{cc}^{+}$ is purely molecular then the $X(3872)$ overbinds (or conversely, if the $X(3872)$ is a molecule the $T_{cc}^{+}$ does not bind). This might be consequential for determining the nature of these states.

    hep-phhep-exnucl-thPRD(2023)·31 citations
12. 12*

    Linking resonant leptogenesis with dynamics of the inverse seesaw theory with $A_4$ flavor symmetry

    Maibam Ricky Devi🇮🇳 · Kalpana Bora🇮🇳

    In this paper, we analyse resonant leptogenesis in a low scale inverse seesaw model with $A_4$ flavor symmetry, in a model we explored earlier to explain light neutrino masses and mixings, and also charged lepton flavor violating decay $\mu \to e\gamma$. Six $A_4$ scalar singlets and one $A_4$ fermion triplet are included, which are charged under the group $A_4\times U(1{)}_X\times Z_5\times Z_4$, with at least two degenerate RH (Right Handed) neutrinos. The light neutrino masses and leptogenesis both share a same origin with the heavy right handed neutrinos. Thus, we expound the possibility of generating resonant leptogenesis in this model at energies as low as 1 TeV. We then analyse our findings to envision if our model inclines more towards weak or strong washout.

    hep-ph3 citations
13. 13*

    Determination of meson fragmentation functions in the Field-Feynman model

    Qiaomu Peng🇨🇳 · Bo-Qiang Ma🇨🇳

    We study the fragmentation functions of both pions and kaons in the Field-Feynman recursive model with the extended SU(2) flavor symmetry relations of fragmentation functions and fitting parameters. Parametrizations are determined from a leading-order (LO) analysis of HERMES experimental multiplicity data of meson production in semi-inclusive deep inelastic scattering, and uncertainties are estimated with the Hessian method. We compare our results with the experimental data and the analysis results of other parametrizations. The SU(2) flavor symmetry breaking effect of meson fragmentation functions of $ud$ quarks is also discussed, and we show that the fragmentation functions of kaons have a bigger SU(2) flavor symmetry breaking effect of $ud$ quarks than these of pions.

    hep-phnucl-thPRC(2023)·3 citations
14. 14*

    Asymptotic Analysis on Binned Likelihood and Neutrino Floor

    Jian Tang🇨🇳 · Bing-Long Zhang🇨🇳

    Observations of suspected coherent elastic neutrino-nucleus scatterings by dark matter direct detection experiments highlight the need for an investigation into the so-called "neutrino floor". We focus on the discovery limit, a statistical concept to identify the neutrino floor, and analyze the asymptotic behaviour of the profile binned likelihood ratio test statistic where the likelihood is constructed by variate from events in each bin and pull terms from neutrino fluxes. To achieve the asymptotic result, we propose two novel methods: i) Asymptotic-Analytic method, which furnishes the analytic result for large statistics, is applicable for more extra nuisance parameters, and enables the identification of the most relevant parameters in the statistical analysis; ii) Quasi-Asimov dataset, which is analogous to Asimov dataset but with improved speed. Applying our methods to the neutrino floor, we significantly accelerate the computation procedure compared to the previous literature, and successfully address cases where Asimov dataset fails. Our derivation on the asymptotic behavior of the test statistic not only facilitates research into the impact of neutrinos on the search for dark matter, but may also prove relevant in similar application scenarios.

    hep-phhep-exPRD(2023)·10 citations
15. 15*

    A New Higgs Boson with Electron-Muon Flavor-Violating Couplings

    R. Primulando🇮🇩 · J. Julio🇮🇩 · N. Srimanobhas🇹🇭 · P. Uttayarat🇹🇭

    Recently, the CMS Collaboration performed a search on a new resonance decaying to $e^{\pm }{\mu }^{\mp }$ in the mass range of 110 GeV to 160 GeV. The search also hints a possible excess at 146 GeV with a $3.8\sigma (2.8\sigma )$ of local (global) significance. Motivated by that, we try to interpret the results in the context of the type-III two-Higgs-doublet-model. We find that the excess is only moderately constrained by low-energy lepton-flavor-violation processes, in particular the $\mu \to e\gamma$ decay. We also compare the CMS bounds across the entire search region against constraints of $\mu \to e\gamma$ and $\mu \to e$ conversion in nuclei. Our finding indicates that the collider bounds can be superior to those of low-energy processes for the scalar mass between $110\text{ GeV}$ and $150\text{ GeV}$, suggesting the importance of this mass range for future searches.

    hep-phPLB(2023)·9 citations
16. 16*

    Inflation Correlators at the One-Loop Order: Nonanalyticity, Factorization, Cutting Rule, and OPE

    Zhehan Qin🇨🇳 · Zhong-Zhi Xianyu🇨🇳

    Inflation correlators with one-loop massive exchange encode rich information about the dynamics of the massive loop particles. Their nonanalytic behavior in certain soft limits leads to characteristic oscillatory pattern, which is the leading signal of many particle models of cosmological collider physics. In this work, we investigate systematically such nonanalyticity for arbitrary one-particle-irreducible (1PI) one-loop correlators in various soft limits. With the partial Mellin-Barnes representation, we present and prove a factorization theorem and a cutting rule for arbitrary 1PI one-loop inflation correlators, which is reminiscent of the on-shell cutting rule for flat-space scattering amplitudes. We also show how to understand this factorization theorem from the viewpoint of operator product expansion on the future boundary. As an application of the one-loop factorization theorem, we derive new analytic and exact formulae for nonlocal cosmological collider signals for massive one-loop four-point inflation correlators of all possible 1PI topologies, including the bubble, the triangle, and the box graphs. Finally, we show how to push the computation of nonlocal signals to higher orders in the momentum ratio.

    ↳ hep-thastro-ph.COhep-phJHEP(2023)·70 citations
17. 17*

    On Sequential Single-Pion Production in Double-Pionic Fusion

    M. Bashkanov🇬🇧 · H. Clement🇩🇪

    Recently a two-step process has been proposed for the double-pionic fusion to deuterium $pn(I=0)\to d{\pi }^{+}{\pi }^{-}$. Its calculation is solely based on total cross section data for the two sequential single-pion production steps $pn(I=0)\to pp{\pi }^{-}$ followed by $pp\to d{\pi }^{+}$. Though this sequential process was aimed to explain the dibaryon resonance $d^{\ast }(2380)$ peak in double-pionic fusion, we demonstrate that this is not the case. It rather fits to a possible broad bump at 2.31 GeV in the energy dependence of the $pn\to d{\pi }^0{\pi }^0$ reaction, which was recently interpreted as a consequence of dibaryonic excitations in isoscalar single-pion production.

    ↳ nucl-thhep-exhep-phnucl-exNPA(2023)·0 citations
18. 18*

    Stochastic gravitational-wave background at 3G detectors as a smoking gun for microscopic dark matter relics

    G. Franciolini🇮🇹 · P. Pani🇮🇹

    Microscopic horizonless relics could form in the early universe either directly through gravitational collapse or as stable remnants of the Hawking evaporation of primordial black holes. In both cases they completely or partially evade cosmological constraints arising from Hawking evaporation and in certain mass ranges can explain the entirety of the dark matter. We systematically explore the stochastic gravitational-wave background associated with the formation of microscopic dark-matter relics in various scenarios, adopting an agnostic approach and discussing the limitations introduced by existing constraints, possible ways to circumvent the latter, and expected astrophysical foregrounds. Interestingly, this signal is at most marginally detectable with current interferometers but could be detectable by third-generations instruments such as the Einstein Telescope, strengthening their potential as discovery machines.

    ↳ astro-ph.COgr-qchep-phhep-thPRD(2023)·28 citations
19. 19*

    QCD Anderson transition with overlap valence quarks on a twisted-mass sea

    Robin Kehr🇩🇪 · Dominik Smith🇩🇪 · Lorenz von Smekal🇩🇪

    In this work we probe the QCD Anderson transition by studying spectral distributions of the massless overlap operator on gauge configurations created by the twisted mass at finite temperature collaboration (tmfT) with 2+1+1 flavors of dynamical quarks and the Iwasaki gauge action. We assess finite-size and discretization effects by considering two different lattice spacings and several physical volumes, and mimic the approach to the continuum limit through stereographic projection. Fitting the inflection points of the participation ratios of the overlap Dirac eigenmodes, we obtain estimates of the temperature dependence of the mobility edge, below which quark modes are localized. We observe that it is well-described by a quadratic polynomial and systematically vanishes at temperatures below the pseudocritical one of the chiral transition. In fact, our best estimates within errors overlap with that of the chiral phase transition temperature of QCD in the chiral limit.

    ↳ hep-lathep-phPRD(2024)·17 citations
20. 20*

    Finite-volume energy shift of the three-nucleon ground state

    Rishabh Bubna (Bonn U., HISKP)🇩🇪 · Fabian Müller (Bonn U., HISKP)🇩🇪 · Akaki Rusetsky (Bonn U., HISKP and Tbilisi State U.)🇩🇪

    A perturbative calculation of the three-nucleon ground-state energy shift in a finite volume is carried out within the non-relativistic effective theory. The energy shift is evaluated up to and including $\mathcal{O}(L^{-6})$, where $L$ is the size of a cubic box. The convergence of the perturbative series at physical values of the scattering lengths is studied numerically.

    ↳ hep-lathep-phPRD(2023)·24 citations
21. 21*

    Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data

    Ayan Chakraborty🇮🇳 · Md Riajul Haque🇮🇳 · Debaprasad Maity🇮🇳 · Rajesh Mondal🇮🇳

    We are in the era of precision cosmology which offers us a unique opportunity to investigate beyond standard model physics. Toward this endeavor, inflaton is assumed to be a perfect new physics candidate. In this submission, we explore the phenomenological impact of the latest observation of PLANCK and BICEP/$Keck$ data on the physics of inflation. We particularly study three different models of inflation, namely $\alpha$-attractor E, T, and the minimal plateau model. We further consider two different post-inflationary reheating dynamics driven by inflaton decaying into bosons and fermions. Given the latest data in the inflationary $(n_s-r)$ plane, we derive detailed phenomenological constraints on different inflaton parameters and the associated physical quantities, such as inflationary $e$-folding number, $N_k$, reheating temperatures $T_{\mathrm{re}}$. Apart from considering direct observational data, we further incorporate the bounds from primordial gravitational waves (PGWs) and different theoretical constraints. Rather than in the laboratory, our results illustrate the potential of present and future cosmological observations to look for new physics in the sky.

    ↳ astro-ph.COhep-phhep-thPRD(2023)·52 citations
22. 22*

    Classical gravitational scattering at $\mathcal{O}(G^2{S}_1^{\infty }{S}_2^{\infty })$

    Rafael Aoude🇧🇪 · Kays Haddad🇸🇪 · Andreas Helset🇺🇸

    We calculate the scattering of two rotating objects with the linear-in-curvature spin-induced multipoles of Kerr black holes at $\mathcal{O}(G^2)$ and all orders in the spins of both objects. This is done including the complete set of contact terms potentially relevant to Kerr-black-hole scattering at $\mathcal{O}(G^2)$. As such, Kerr black holes should be described by this scattering amplitude for a specific choice of values for the contact-term coefficients. The inclusion of all potential contact terms means this amplitude allows for a comprehensive search for structures emerging for certain values of the coefficients, and hence special properties that might be exhibited by Kerr-black-hole scattering. Our result can also act as a template for comparison for future computations of classical gravitational high-spin scattering.

    ↳ hep-thgr-qchep-phPRD(2023)·77 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.