Thu·Oct 22, 2020Thursday·October 22, 2020

1. 01*

   Early-Stage Shear Viscosity far from Equilibrium via Holography

   Michael F. Wondrak🇩🇪 · Matthias Kaminski🇺🇸 · Marcus Bleicher🇩🇪

   Shear viscosity is a crucial property of QCD matter which determines the collective behavior of the the quark-gluon plasma (QGP) in ultrarelativistic heavy-ion collisions. Extending the near-equilibrium, high-precision investigations in theory and experiment, we take into account the fact that, in a collision, the QGP is generated far from equilibrium. We use the AdS/CFT correspondence to study a strongly coupled plasma and find a significant impact on the ratio of shear viscosity to entropy density, $\eta /s$. In particular, we investigate the initial heating phase and find a decrease reaching down to below 60% followed by an overshoot to 110% of the near-equilibrium value. This finding might be highly relevant for the extraction of transport coefficients from anisotropic flow measurements at RHIC and LHC.

   hep-phhep-thnucl-thNPA(2021)·5 citations
2. 02*

   P-wave ${\Omega }_b$ states: masses and pole residues

   Yong-Jiang Xu🇨🇳 · Yong-Lu Liu🇨🇳 · Ming-Qiu Huang🇨🇳

   In this paper, we consider all P-wave ${\Omega }_b$ states represented by interpolating currents with a derivative and calculate the corresponding masses and pole residues with the method of QCD sum rule. Due to the large uncertainties in our calculation compared with the small difference in the masses of the excited ${\Omega }_b$ states observed by the LHCb collaboration, it is necessary to study other properties of the P-wave ${\Omega }_b$ states represented by the interpolating currents investigated in the present work in order to have a better understanding about the four excited ${\Omega }_b$ states observed by the LHCb collaboration.

   hep-phCPC(2022)·9 citations
3. 03*

   Effects of hadronic repulsive interactions on the fluctuations of conserved charges

   Somenath Pal🇮🇳 · Guruprasad Kadam🇮🇳 · Hiranmaya Mishra🇮🇳 · Abhijit Bhattacharyya🇮🇳

   We investigate the effects of repulsive interaction between hadrons on the fluctuations of the conserved charges. We calculate the baryon,the electric charge and the strangeness susceptibilities within the ambit of hadron resonance gas model extended to include the short range repulsive interactions.The repulsive interactions are included through a mean-field approach where the single particle energy gets modified due to mean field interactions between hadrons proportional to the number density of hadrons.We assume different mean-field interactions for mesons and baryons. It is shown that the repulsive interactions play a very crucial role to describe hadronic matter near transition temperature. We also show that in order to consistently describe higher order conserved charge fluctuations mesonic repulsive interactions cannot be neglected. Further, we demonstrate that the repulsive interaction of baryons are essential to describe the lattice simulation results at finite baryonchemical potential for higher order fluctuations.

   hep-phnucl-thPRD(2021)·16 citations
4. 04*

   Anisotropy in Dijet Production in Exclusive and Inclusive Processes

   Yoshitaka Hatta🇺🇸 · Bo-Wen Xiao🇨🇳 · Feng Yuan🇺🇸 · Jian Zhou🇨🇳

   We investigate the effect of soft gluon radiations on the azimuthal angle correlation between the total and relative momenta of two jets in inclusive and exclusive dijet processes. We show that the final state effect induces a sizable $\cos (2\varphi )$ anisotropy due to gluon emissions near the jet cones. The phenomenological consequences of this observation are discussed for various collider experiments, including diffractive processes in ultraperipheral $pA$ and $AA$ collisions, inclusive and diffractive dijet production at the EIC, and inclusive dijet in $pp$ and $AA$ collisions at the LHC.

   hep-phhep-exnucl-exnucl-thPRL(2021)·85 citations
5. 05*

   On the Impact of Soft Photons on $B\to K{\ell }^{+}{\ell }^{-}$

   Dayanand Mishra🇮🇳 · Namit Mahajan🇮🇳

   We give detailed results of $\mathcal{O}(\alpha )$ QED corrections (both real emission and virtual corrections) to $B\to K{\ell }^{+}{\ell }^{-}$ modes. Requiring the real emission to be gauge invariant, the structure of the contact term(s) is fixed. The calculation is done with a fictitious photon mass as the IR regulator and results are shown to be independent of it, establishing cancellation of the soft divergences. Results are presented for a choice of photon energy, $k_{max}$, and photon angle ${\theta }_{cut}$. The QED effects are negative, thereby reducing the rate compared to that without QED effects. Electron channels are shown to receive large corrections ($\mathcal{O}(20\%)$). Impact on lepton flavour universality ratio, $R_K^{\mu e}$ are also discussed.

   hep-phhep-exPRD(2021)·13 citations
6. 06*

   Exploring the Universe with Dark Light Scalars

   Bugeon Jo🇰🇷 · Hyeontae Kim🇰🇷 · Hyung Do Kim🇰🇷 · Chang Sub Shin🇰🇷

   We study the cosmology of the dark sector consisting of (ultra) light scalars. Since the scalar mass is radiatively unstable, a special explanation is required to make the mass much smaller than the UV scale. There are two well-known mechanisms for the origin of scalar mass. The scalar can be identified as a pseudo-Goldstone boson, whose shift symmetry is explicitly broken by non-perturbative corrections, like the axion. Alternatively, it can be identified as a composite particle like the glueball, whose mass is limited by the confinement scale of the theory. In both cases, the scalar can be naturally light, but interaction behavior is quite different. The lighter the axion (glueball), the weaker (stronger) it interacts. We consider the dark axion whose shift symmetry is anomalously broken by the hidden non-abelian gauge symmetry. After the confinement of the gauge group, the dark axion and the dark glueball get masses and both form multicomponent dark matter. We carefully consider the effects of energy flow from the dark gluons to the dark axions and derive the full equations of motion for the background and the perturbed variables. The effect of the dark axion-dark gluon coupling on the evolution of the entropy and the isocurvature perturbations is also clarified. Finally, we discuss the gravo-thermal collapse of the glueball subcomponent dark matter after the halos form, in order to explore the potential to contribute to the formation of seeds for the supermassive black holes observed at high redshifts. With the simplified assumptions, the glueball subcomponent dark matter with the mass of $0.01-0.1\mathrm{MeV}$, and the axion main dark matter component with the decay constant $f_a=\mathcal{O}(10^{15}-10^{16})\mathrm{GeV}$, the mass of $\mathcal{O}(10^{-14}-10^{-18})\mathrm{eV}$, can provide the hint on the origin of the supermassive black holes at high redshifts.

   hep-phastro-ph.COPRD(2021)·24 citations
7. 07*

   Naturalness Implications within the Two-Real-Scalar-Singlet beyond the SM

   Jamal Ou aali🇲🇦 · Bouzid Manaut🇲🇦 · Larbi Rahili🇲🇦 · Souad Semlali🇲🇦

   The aim of this study is to investigate the quadratic divergences using dimensional regularization within the context of the standard model extended by two real scalar singlets (TRSM). This extension provides three neutral scalar fields that mix, after developing its {\it vev}'s, leading to three CP-even Higgs bosons, namely: $h_1$, $h_2$ and $h_3$, which would offer a wide phenomenology at the Large Hadron Collider (LHC) as reported recently. Furthermore, to fulfill the Veltman conditions for those three fields, we dwell on the one-loop level ($d_L=2$) of dimensional regularization calculations, assuming $R_{\xi }$ Feynman-'t Hooft gauge-invariant generalization. We show that the divergence cancelation could take place in the framework of the TRSM, and thereby predicts a stringent constraint on the space parameters as well as the new physics (NP) scale, and yet remain consistent with current experimental measurements at 13 TeV.

   hep-phEPJC(2021)·12 citations
8. 08*

   Anomaly cancellation condition in an effective non-perturbative electroweak theory

   Vieri Mastropietro🇮🇹

   We establish the non-perturbative validity of the gauge anomaly cancellation condition in an effective electroweak theory of massless fermions with finite momentum cut-off and Fermi interaction. The requirement that the current is conserved up to terms smaller than the energy divided by the cut-off scale, which is the natural condition as gauge invariance is only emerging, produces the same constraint on charges as in the Standard Model. The result holds at a non-perturbative level as the functional integrals are expressed by convergent power series expansions and are analytic in a finite domain.

   hep-phhep-thmath-phmath.MPPRD(2021)·9 citations
9. 09*

   3-D structure of the Glasma initial state -- Breaking boost-invariance by collisions of extended shock waves in classical Yang-Mills theory

   Soeren Schlichting🇩🇪 · Pragya Singh🇩🇪

   We simulate the 3+1 D classical Yang-Mills dynamics of the collisions of longitudinally extended nuclei, described by eikonal color charges in the Color Glass Condensate framework. By varying the longitudinal thickness of the colliding nuclei, we discuss the violations of boost invariance and explore how the boost invariant high-energy limit is approached. Subsequently, we develop a more realistic model of the three dimensional color charge distributions that connects longitudinal and transverse fluctuations to the $x$ and $k_{\perp }$ dependence of transverse momentum dependent parton distributions, and explore the resulting rapidity profiles and their longitudinal fluctuations.

   hep-phnucl-thPRD(2021)·31 citations
10. 10*

    Millicharged Cosmic Rays and Low Recoil Detectors

    Roni Harnik🇺🇸 · Ryan Plestid🇺🇸 · Maxim Pospelov🇺🇸 · Harikrishnan Ramani🇺🇸

    We consider the production of a "fast flux" of hypothetical millicharged particles (mCPs) in the interstellar medium (ISM). We consider two possible sources induced by cosmic rays: (a) $pp\to$(meson)$\to$(mCP) which adds to atmospheric production of mCPs, and (b) cosmic-ray up-scattering on a millicharged component of dark matter. We notice that the galactic magnetic fields retain mCPs for a long time, leading to an enhancement of the fast flux by many orders of magnitude. In both scenarios, we calculate the expected signal for direct dark matter detection aimed at electron recoil. We observe that in Scenario (a) neutrino detectors (ArgoNeuT and Super-Kamiokande) still provide superior sensitivity compared to dark matter detectors (XENON1T). However, in scenarios with a boosted dark matter component, the dark matter detectors perform better, given the enhancement of the upscattered flux at low velocities. Given the uncertainties, both in the flux generation model and in the actual atomic physics leading to electron recoil, it is still possible that the XENON1T-reported excess may come from a fast mCP flux, which will be decisively tested with future experiments.

    hep-phastro-ph.COastro-ph.HEhep-exPRD(2021)·42 citations
11. 11*

    Detecting Dark Photons from Atomic Rearrangement in the Galaxy

    James Eiger🇮🇱 · Michael Geller🇮🇱

    We study a new dark sector signature for an atomic process of "rearrangement" in the galaxy. In this process, a hydrogen-like atomic dark matter state together with its anti-particle can rearrange to form a highly-excited bound state. This bound state will then de-excite into the ground state emitting a large number of dark photons that can be measured in experiments on Earth through their kinetic mixing with the photon. We find that for DM masses in the GeV range, the dark photons have enough energy to pass the thresholds of neutrino observatories such as Borexino and Super-Kamiokande that can probe for our scenario even when our atomic states constitute a small fraction of the total DM abundance. We study the corresponding bounds on the parameters of our model from current data as well as the prospects for future detectors.

    hep-phJHEP(2021)·1 citation
12. 12*

    On Lorentz invariant complex scalar fields

    Gustavo Rigolin🇧🇷

    We obtain a Lorentz covariant wave equation whose complex wave function transforms under a Lorentz boost according to the following rule, $\Psi (x)\to e^{\frac{i}{\hslash }f(x)}\Psi (x)$. We show that the spacetime dependent phase $f(x)$ is the most natural relativistic extension of the phase associated with the transformation rule for the non-relativistic Schroedinger wave function when it is subjected to a Galilean transformation. We then generalize the previous analysis by postulating that $\Psi (x)$ transforms according to the above rule under proper Lorentz transformations (boosts or spatial rotations). This is the most general transformation rule compatible with a Lorentz invariant physical theory whose observables are bilinear functions of the field $\Psi (x)$. We use the previous wave equations to describe several physical systems. In particular, we solve the bound state and scattering problems of two particles which interact both electromagnetically and gravitationally (static electromagnetic and gravitational fields). The former interaction is modeled via the minimal coupling prescription while the latter enters via an external potential. We also formulate logically consistent classical and quantum field theories associated with these Lorentz covariant wave equations. We show that it is possible to make those theories equivalent to the Klein-Gordon theory whenever we have self-interacting terms that do not break their Lorentz invariance or if we introduce electromagnetic interactions via the minimal coupling prescription. For interactions that break Lorentz invariance, we show that the present theories imply that particles and antiparticles behave differently at decaying processes, with the latter being more unstable. This suggests a possible connection between Lorentz invariance-breaking interactions and the matter-antimatter asymmetry problem.

    hep-phhep-thquant-phAdv.High Energy Phys.(2022)·4 citations
13. 13*

    Hadron-Quark Phase Transition at Finite Density in the Presence of a Magnetic Field: Anisotropic Approach

    E. J. Ferrer🇺🇸 · A. Hackebill🇺🇸

    We investigate the hadron-quark phase transition at finite density in the presence of a magnetic field taking into account the anisotropy created by a uniform magnetic field in the system's equations of state. We find a new anisotropic equilibrium condition that will drive the first-order phase transition along the boundary between the two phases. Fixing the magnetic field in the hadronic phase, the phase transition is realized by increasing the baryonic chemical potential at zero temperature. It is shown that the magnetic field is mildly boosted after the system transitions from the hadronic to the quark phase. The magnetic-field discontinuity between the two phases is supported by a surface density of magnetic monopoles, which accumulate at the boundary separating the two phases. The mechanism responsible for the monopole charge density generation is discussed. Each phase is found to be paramagnetic with higher magnetic susceptibility in the quark phase. The connection with the physics of neutron stars is highlighted through out the paper.

    ↳ nucl-thastro-ph.HEhep-phInt.J.Mod.Phys.A(2022)·16 citations
14. 14*

    Keldysh Rotation in the Large-N Expansion and String Theory Out of Equilibrium

    Petr Horava🇺🇸 · Christopher J. Mogni🇺🇸

    We extend our study of the large-$N$ expansion of general non-equilibrium many-body systems with matrix degrees of freedom $M$, and its dual description as a sum over surface topologies in a dual string theory, to the Keldysh-rotated version of the Schwinger-Keldysh formalism. The Keldysh rotation trades the original fields $M_{\pm }$ -- defined as the values of $M$ on the forward and backward segments of the closed time contour -- for their linear combinations $M_{\text{cl}}$ and $M_{\text{qu}}$, known as the "classical" and "quantum" fields. First we develop a novel "signpost" notation for non-equilibrium Feynman diagrams in the Keldysh-rotated form, which simplifies the analysis considerably. Before the Keldysh rotation, each worldsheet surface $\Sigma$ in the dual string theory expansion was found to exhibit a triple decomposition into the parts ${\Sigma }^{\pm }$ corresponding to the forward and backward segments of the closed time contour, and ${\Sigma }^{\wedge }$ which corresponds to the instant in time where the two segments meet. After the Keldysh rotation, we find that the worldsheet surface $\Sigma$ of the dual string theory undergoes a very different natural decomposition: $\Sigma$ consists of a "classical" part ${\Sigma }^{\text{cl}}$, and a "quantum embellishment" part ${\Sigma }^{\text{qu}}$. We show that both parts of $\Sigma$ carry their own independent genus expansion. The non-equilibrium sum over worldsheet topologies is naturally refined into a sum over the double decomposition of each $\Sigma$ into its classical and quantum part. We apply this picture to the classical limits of the quantum non-equilibrium system (with or without interactions with a thermal bath), and find that in these limits, the dual string perturbation theory expansion reduces to its appropriately defined classical limit.

    ↳ hep-thcond-mat.otherhep-phmath-ph+2PRD(2022)·12 citations
15. 15*

    Ambipolar diffusion velocity and magnetic field evolution in magnetar core: Generalised theoretical approach

    Monika Sinha🇮🇳 · Manoj Ghosh🇮🇳

    The magnetic field associated with neutron stars is generally believed to be threaded inside the star. In the presence of a magnetic field, the plasma present in the interior of the star goes through several processes that lead to magnetic field evolution. It is thought that magnetar activities are mainly due to field decay. The most important process of field decay inside the core of the star is the ambipolar diffusion of the charged particles present in the interior plasma. The decay rate due to ambipolar diffusion is directly connected to the ambipolar velocity of the charged particles under the influence of the present magnetic field. The ambipolar velocity of the charged particles depends on the internal dynamics of the particles. We outline a general method to solve the particle dynamics in the presence of a magnetic field using a magnetohydrodynamic equation for ambipolar velocity. The equation is general and applies to all possible surrounding conditions \eg temperature, and matter states like normal or superfluid.

    ↳ astro-ph.HEhep-ph0 citations
16. 16*

    Spontaneous CP violation and symplectic modular symmetry in Calabi-Yau compactifications

    Keiya Ishiguro🇯🇵 · Tatsuo Kobayashi🇯🇵 · Hajime Otsuka🇯🇵

    We explore the geometrical origin of CP and the spontaneous CP violation in Calabi-Yau compactifications. We find that the CP symmetry is identified with an outer automorphism of the symplectic modular group in the large complex structure regime of Calabi-Yau threefolds, thereby enlarging the symplectic modular group to their semidirect product group. The spontaneous CP violation is realized by the introduction of fluxes, whose effective action is invariant under CP as well as the discrete ${\mathbb{Z}}_2$ symmetry or ${\mathbb{Z}}_4$ R-symmetry. We explicitly demonstrate the spontaneous CP violation on a specific Calabi-Yau threefold.

    ↳ hep-thhep-phNPB(2021)·69 citations
17. 17*

    Manifestly Causal In-In Perturbation Theory about the Interacting Vacuum

    Matthew Baumgart🇺🇸 · Raman Sundrum🇺🇸

    In-In perturbation theory is a vital tool for cosmology and nonequilibrium physics. Here, we reconcile an apparent conflict between two of its important aspects with particular relevance to De Sitter/inflationary contexts: (i) the need to slightly deform unitary time evolution with an i*epsilon prescription that projects the free ("Bunch-Davies") vacuum onto the interacting vacuum and renders vertex integrals well-defined, and (ii) Weinberg's "nested commutator" reformulation of in-in perturbation theory which makes manifest the constraints of causality within expectation values of local operators, assuming exact unitarity. We show that a modified i*epsilon prescription maintains the exact unitarity on which the derivation of (ii) rests, while nontrivially agreeing with (i) to all orders of perturbation theory.

    ↳ hep-thastro-ph.COgr-qchep-phJHEP(2021)·54 citations
18. 18*

    Deconstructing higher order clockwork gravity

    Anastasios Avgoustidis🇬🇧 · Florian Niedermann🇸🇪 · Antonio Padilla🇬🇧 · Paul M. Saffin🇬🇧

    We consider the higher order clockwork theory of gravitational interactions, whereby a number of gravitons are coupled together with TeV strength, but nevertheless generate a Planck scale coupling to matter without the need for a dilaton. It is shown that the framework naturally lends itself to a five-dimensional geometry, and we find the 5D continuum version of such deconstructed 4D gravitational clockwork models. Moreover, the clockwork picture has matter coupled to particular gravitons, which in the 5D framework looks like a braneworld model, with the Randall-Sundrum model being a special case. More generally, the gravitational clockwork leads to a family of scalar-tensor braneworld models, where the scalar is not a dilaton.

    ↳ hep-thgr-qchep-phPRD(2021)·9 citations
19. 19*

    Nano-Hz gravitational wave signature from axion dark matter

    Naoya Kitajima🇯🇵 · Jiro Soda🇯🇵 · Yuko Urakawa🇯🇵

    We calculate the accurate spectrum of the stochastic gravitational wave background from U(1) gauge fields produced by axion dark matter. The explosive production of gauge fields soon invalidates the applicability of the linear analysis and one needs nonlinear schemes. We make use of numerical lattice simulations to properly follow the nonlinear dynamics such as backreaction and rescattering which gives important contributions to the emission of gravitational waves. It turns out that the axion with the decay constant $f\sim 10^{16}$ GeV which gives the correct dark matter abundance predicts the circularly polarized gravitational wave signature detectable by SKA. We also show that the resulting gravitational wave spectrum has a potential to explain NANOGrav 12.5 year data.

    ↳ astro-ph.COhep-phPRL(2021)·40 citations
20. 20*

    Bounds on Dark Matter Annihilation Cross-sections from Inert Doublet Model in the context of 21 cm Cosmology of Dark Ages

    Rupa Basu🇮🇳 · Madhurima Pandey🇮🇳 · Debasish Majumdar🇮🇳 · Shibaji Banerjee🇮🇳

    We study the fluctuations in the brightness temperature of 21-cm signal $\delta T_{21}$ at the dark ages ($z\sim 100$) with a dark matter candidate in Inter Doublet Model (IDM). We then explore the effects of different fractions of IDM dark matter on $\delta T_{21}$ signal. The IDM dark matter masses are chosen in few tens of GeV region as well as in the high mass region beyond 500 GeV. It has been observed that the $\delta T_{21}$ signal is more sensitive in the dark matter mass range of $70-80$ GeV. A lower bound on annihilation cross-section for this dark matter is also obtained analyzing the $\delta T_{21}$ signal. This is found to lie within the range $6.5\times 10^{-29}\mathrm{c}{\mathrm{m}}^3/sec\le ⟨\sigma \mathrm{v}⟩\le 4.88\times 10^{-26}\mathrm{c}{\mathrm{m}}^3/sec$ for the IDM dark matter mass range $10\mathrm{GeV}\le m_{\chi }\le 990\mathrm{GeV}$.

    ↳ astro-ph.COhep-phInt.J.Mod.Phys.A(2021)·20 citations
21. 21*

    Sensitivity of the SHiP experiment to light dark matter

    SHiP Collaboration

    Dark matter is a well-established theoretical addition to the Standard Model supported by many observations in modern astrophysics and cosmology. In this context, the existence of weakly interacting massive particles represents an appealing solution to the observed thermal relic in the Universe. Indeed, a large experimental campaign is ongoing for the detection of such particles in the sub-GeV mass range. Adopting the benchmark scenario for light dark matter particles produced in the decay of a dark photon, with ${\alpha }_D=0.1$ and $m_{A^{\prime }}=3m_{\chi }$, we study the potential of the SHiP experiment to detect such elusive particles through its Scattering and Neutrino detector (SND). In its 5-years run, corresponding to $2\cdot 10^{20}$ protons on target from the CERN SPS, we find that SHiP will improve the current limits in the mass range for the dark matter from about 1 MeV to 300 MeV. In particular, we show that SHiP will probe the thermal target for Majorana candidates in most of this mass window and even reach the Pseudo-Dirac thermal relic.

    ↳ hep-exhep-phJHEP(2021)·58 citations
22. 22*

    Quintessential Inflation in Palatini Gravity

    Sarunas Verner🇺🇸

    We study a model of quintessential inflation in the context of Palatini gravity. As a representative example, we consider the Peebles-Vilenkin model of quintessential inflation with a small non-minimal coupling to gravity, which is consistent with the most recent Planck measurements. At the end of inflation, the inflaton field passes through a tachyonic region and it leads to explosive particle production through the tachyonic preheating process. After preheating, the Universe becomes dominated by the kinetic energy of the inflaton and enters a period of kination. Eventually, the total energy density of the Universe becomes dominated by radiation, resulting in reheating. We find that the model predicts the reheating temperature values $T_{\mathrm{RH}}\sim \mathcal{O}(10^3-10^8)\mathrm{GeV}$, which is significantly above the temperature of Big Bang Nucleosynthesis. Following reheating, the inflaton field rolls down the quintessence potential until it freezes. Since the quintessence remains frozen until the present day, the residual potential energy density at this field value explains the observed dark energy density.

    ↳ gr-qcastro-ph.COhep-phhep-thJCAP(2021)·17 citations
23. 23*

    On Dark Matter Explanations of the Gamma-Ray Excesses from the Galactic Center and M31

    Anne-Katherine Burns🇺🇸 · Max Fieg🇺🇸 · Christopher M. Karwin🇺🇸 · Arvind Rajaraman🇺🇸

    The presence of an excess gamma-ray signal toward the Galactic center (GC) has now been well established, and is known as the GC excess. Leading explanations for the signal include mis-modeling of the Galactic diffuse emission along the line of sight, an unresolved population of millisecond pulsars, and/or the annihilation of dark matter (DM). Recently, evidence for another excess gamma-ray signal has been reported toward the outer halo of M31. In this work we interpret the excess signals from both the GC and outer halo of M31 in the framework of DM annihilation, and show that the two spectra are consistent with a DM origin once J-factors are taken into account. We further compare the excesses to models of DM annihilation, and determine the corresponding best-fit parameters. We find good fits to the spectrum both in two body and four body annihilation modes.

    ↳ astro-ph.HEhep-phPRD(2021)·9 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.