Mon·Apr 6, 2020Monday·April 6, 2020

1. 01*

   Exploiting CP-asymmetries in rare charm decays

   Rigo Bause🇩🇪 · Hector Gisbert🇩🇪 · Marcel Golz🇩🇪 · Gudrun Hiller🇩🇪

   We analyze patterns from CP-violating new physics (NP) in hadronic and semileptonic rare charm $|\Delta c|=|\Delta u|=1$ transitions. Observation of direct CP-violation in hadronic decays, as in $\Delta A_{\text{CP}}$, provides opportunities for $c\to u{\ell }^{+}{\ell }^{-}$, $\ell =e,\mu$ transitions, and vice versa. For the concrete case of flavorful, anomaly-free $Z^{\prime }$-models a NP-interpretation of $\Delta A_{\text{CP}}$ suggests measurable CP-asymmetries in semileptonic decays such as $D\to \pi {\ell }^{+}{\ell }^{-}$ or $D\to \pi \pi {\ell }^{+}{\ell }^{-}$. Conversely, an observation of CP-violation in $c\to u{e}^{+}{e}^{-}$ or $c\to u{\mu }^{+}{\mu }^{-}$ decays supports a NP--interpretation of $\Delta A_{\text{CP}}$. Flavorful $U(1{)}^{\prime }$-extensions provide explicit U--spin and isospin breaking which can be probed in patterns of hadronic decays of charm mesons. We work out signatures for CP-asymmetries in $D^0\to {\pi }^{+}{\pi }^{-}$, $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^0{\pi }^0$, $D^{+}\to {\pi }^{+}{\pi }^0$ decays, which can be probed in the future at LHCb and Belle II and provide further informative cross checks.

   hep-phhep-exPRD(2020)·51 citations
2. 02*

   Pion Pressure in a Magnetic Field

   Christoph P. Hofmann🇲🇽

   While the partition function for QCD in a magnetic field $H$ has been calculated before within chiral perturbation theory up to two-loop order, our investigation relies on an alternative representation for the Bose functions which allows for a clear-cut expansion of thermodynamic quantities in the chiral limit. We first focus on the pion-pion interaction in the pressure and show that -- depending on magnetic field strength, temperature and pion mass -- it may be attractive or repulsive. We then analyze the thermodynamic properties in the chiral limit and provide explicit two-loop representations for the pressure in the weak magnetic field limit $|qH|\ll T^2$.

   hep-phhep-lathep-thPRD(2020)·7 citations
3. 03*

   Parity violating semi-inclusive deeply inelastic scattering at the Electron-Ion Collider

   Kai-bao Chen🇨🇳 · Wei-hua Yang🇨🇳

   We present a systematic calculation of the current jet production semi-inclusive deeply inelastic scattering process at the Electron-Ion Collider energy. Contributions from weak interactions are considered which give rise to parity violating effects. We consider the general form of the polarized electron beam scattering off the polarized target which has spin 1. The calculations are carried out up to twist-3 level in the quantum chromodynamics parton model by applying the collinear expansion where multiple gluon scattering is taken into account and gauge links are obtained automatically. We present complete results for structure functions and spin/azimuthal asymmetries in terms of the gauge invariant transverse momentum dependent parton distribution functions. Both the unpolarized and the polarized electron beam cases correspond to 24 azimuthal asymmetries, in which 6 of them appear at the leading twist, while 18 of them contribute at twist-3 level. In addition we also calculate the parity-violating asymmetries which arise from the interference of the electromagnetic and weak interactions.

   hep-phPRD(2020)·17 citations
4. 04*

   Heavy vector and axial-vector $D$ mesons in hot magnetized asymmetric nuclear matter

   Rajesh Kumar🇮🇳 · Rahul Chhabra🇮🇳 · Arvind Kumar🇮🇳

   We observed the impact of finite magnetic field on the in-medium mass and decay constant of isospin averaged vector $D^{\ast }(D^{{\ast }^{+}},D^{{\ast }^0})$ and axial-vector $D_1(D_1^{+},D_1^0)$ mesons. The quark and gluon condensates of the nuclear medium at finite magnetic field, temperature, isospin asymmetry, and density have been obtained by the meson exchange scalar fields within the chiral SU(3) model. The medium attributes modify the scalar and vector density of nuclear medium and this variation reflects in the in-medium mass and decay constant of spin 1 $D$ mesons. We calculate these observables by comparing the Operator Product Expansion (OPE) and the phenomenological side in the QCD Sum Rules. In the results, we observed a positive mass shift for charged vector and axial-vector $D$ mesons with respect to magnetic field. For neutral vector (axial-vector) $D$ mesons we observed negative (positive) mass shift as a function of magnetic field. In the application part, we calculate the in-medium partial decay width of the process $D_s^{\ast }$(2715/2860) $\to$ $D^{\ast }K$ by using ${}^3{P}_0$ model. The in-medium effects are incorporated through the in-medium masses of $D^{\ast }$ and $K$ mesons.

   hep-phnucl-thEPJA(2020)·12 citations
5. 05*

   $E_6$ Motivated UMSSM Confronts Experimental Data

   Mariana Frank🇨🇦 · Yaşar Hiçyilmaz🇬🇧 · Stefano Moretti🇬🇧 · Özer Özdal🇨🇦

   We test $E_6$ realisations of a generic $U(1{)}^{\prime }$ extended Minimal Supersymmetric Standard Model (UMSSM), parametrised in terms of the mixing angle pertaining to the new $U(1{)}^{\prime }$ sector, ${\theta }_{E_6}$, against all currently available data, from space to ground experiments, from low to high energies. We find that experimental constraints are very restrictive and indicate that large gauge kinetic mixing and ${\theta }_{E_6}\approx -\pi /3$ are required within this theoretical construct to achieve compliance with current data. The consequences are twofold. On the one hand, large gauge kinetic mixing implies that the $Z^{\prime }$ boson emerging from the breaking of the additional $U(1{)}^{\prime }$ symmetry is rather wide since it decays mainly into $WW$ pairs. On the other hand, the preferred ${\theta }_{E_6}$ value calls for a rather specific $E_6$ breaking pattern different from those commonly studied. We finally delineate potential signatures of the emerging UMSSM scenario in both Large Hadron Collider (LHC) and in Dark Matter (DM) experiments.

   hep-phJHEP(2020)·15 citations
6. 06*

   The scalar $f_0(500)$ and $f_0(980)$ resonances and vector mesons in the single Cabibbo-suppressed decays ${\Lambda }_c\to p{K}^{+}{K}^{-}$ and $p{\pi }^{+}{\pi }^{-}$

   Zhe Wang🇨🇳 · Yan-Yan Wang🇨🇳 · En Wang🇨🇳 · De-Min Li🇨🇳 · Ju-Jun Xie🇨🇳

   In the chiral unitary approach, we have studied the single Cabibbo-suppressed decays ${\Lambda }_c\to p{K}^{+}{K}^{-}$ and ${\Lambda }_c\to p{\pi }^{+}{\pi }^{-}$ by taking into account the $s$-wave meson-meson interaction as well as the contributions from the intermediate vectors $\varphi$ and ${\rho }^0$. Our theoretical results for the ratios of the branching fractions of ${\Lambda }_c\to p{\bar{K}}^{\ast 0}$ and ${\Lambda }_c\to p\omega$ with respect to the one of ${\Lambda }_c\to p\varphi$ are in agreement with the experimental data. Within the picture that the scalar resonances $f_0(500)$, $f_0(980)$, and $a_0(980)$ are dynamically generated from the pseudoscalar-pseudoscalar interactions in $s$-wave, we have calculated the $K^{+}{K}^{-}$ and ${\pi }^{+}{\pi }^{-}$ invariant mass distributions respectively for the decays ${\Lambda }_c\to p{K}^{+}{K}^{-}$ and ${\Lambda }_c\to p{\pi }^{+}{\pi }^{-}$. One can find a broad bump structure for the $f_0(500)$ and a narrow peak for the $f_0(980)$ in the ${\pi }^{+}{\pi }^{-}$ invariant mass distribution of the decay ${\Lambda }_c\to p{\pi }^{+}{\pi }^{-}$. For the $K^{+}{K}^{-}$ invariant mass distribution, in addition to the narrow peak for the $\varphi$ meson, there is an enhancement structure near the $K^{+}{K}^{-}$ threshold mainly due to the contribution from the $f_0(980)$. Both the ${\pi }^{+}{\pi }^{-}$ and $K^{+}{K}^{-}$ invariant mass distributions are compatible with the BESIII measurement. We encourage our experimental colleagues to measure these two decays, which would be helpful to understand the nature of the $f_0(500)$, $f_0(980)$, and $a_0(980)$.

   hep-phhep-exnucl-thEPJC(2020)·38 citations
7. 07*

   Could the Hubble Tension be Pointing Towards the Neutrino Mass Mechanism?

   Miguel Escudero🇬🇧 · Samuel J. Witte🇪🇸

   Local measurements of the Hubble constant currently disagree with the high-precision value that is inferred from the CMB under the assumption of a $\Lambda$CDM cosmology. The significance of this tension clearly motivates studying extensions of the standard cosmological model capable of addressing this outstanding issue. Broadly speaking, models that have been successful in reducing the the tension between the CMB and local measurements (without introducing additional tension in other datasets) require an additional component of the energy density in the Universe at a time close to recombination. In this contribution, I will show that the Majoron -- a pseudo-Goldstone boson arising from the spontaneous breaking of a global lepton number symmetry and often associated with the neutrino mass mechanism -- can help to reduce the Hubble tension. Importantly, I will also show that current CMB observations can constrain neutrino-Majoron couplings as small as $10^{-13}$, which within the type-I seesaw mechanism correspond to scales of lepton number breaking as high as $\sim 1\text{TeV}$.

   hep-phastro-ph.CO19 citations
8. 08*

   Exotic Hadrons in the ${\Lambda }_b\to J/\psi \varphi \Lambda$ Decay

   Volodymyr Magas🇪🇸 · Àngels Ramos🇪🇸 · Rahul Somasundaram🇪🇸 · Júlia Tena Vidal🇬🇧

   We study the weak decay of the ${\Lambda }_b$ baryon into $J/\psi \varphi \Lambda$, a process that is particularly well suited to analyze the physics of some of the recently observed or theoretically predicted exotic hadrons, as one expects to see their signature in all three final two-body channels. In the $J/\psi \varphi$ invariant mass spectrum we study the interplay between the $X(4140)$ and the $X(4160)$ resonances. The $J/\psi \Lambda$ mass spectrum may help to identify the strange partner of the hidden-charm pentaquark recently observed by the LHCb collaboration, the existence of which has been predicted by a chiral unitary approach. We conclude that this strange pentaquark has a good chance of experimental detection if it is present in the range between $4450-4500$ MeV. Finally, in the $\varphi \Lambda$ spectrum we expect a contribution from a dynamically generated resonance at around $2160$ MeV, but with the present model parameters there is little chance for its experimental detection.

   hep-phPRD(2020)·4 citations
9. 09*

   Pion and Kaon parton distributions in the QCD instanton vacuum

   Arthur Kock🇺🇸 · Yizhuang Liu🇨🇳 · Ismail Zahed🇺🇸

   We discuss a general diagrammatic description of n-point functions in the QCD instanton vacuum that resums planar diagrams, enforces gauge invariance and spontaneously broken chiral symmetry. We use these diagrammatic rules to derive the pion and kaon quasi-parton amplitude and distribution functions at leading order in the instanton packing fraction for large but finite momentum. The instanton and anti-instanton zero modes and non-zero modes are found to contribute to the quasi-distributions, but the latter are shown to drop out in the large momentum limit. The pertinent pion and kaon parton distribution amplitudes and functions are made explicit at the low renormalization scale fixed by the inverse instanton size. Assuming that factorization holds, the pion parton distributions are evolved to higher renormalization scales with one-loop DGLAP and compared to existing data.

   hep-phnucl-thPRD(2020)·42 citations
10. 10*

    Measuring the local Dark Matter density in the laboratory

    Bradley J. Kavanagh🇳🇱 · Timon Emken🇸🇪 · Riccardo Catena🇸🇪

    Despite strong evidence for the existence of large amounts of dark matter (DM) in our Universe, there is no direct indication of its presence in our own solar system. All estimates of the local DM density rely on extrapolating results on much larger scales. We demonstrate for the first time the possibility of simultaneously measuring the local DM density and interaction cross-section with a direct detection experiment. It relies on the assumption that incoming DM particles frequently scatter on terrestrial nuclei prior to detection, inducing an additional time-dependence of the signal. We show that for sub-GeV DM, with a large spin-independent DM-proton cross section, future direct detection experiments should be able to reconstruct the local DM density with smaller than 50% uncertainty.

    hep-phastro-ph.COPRD(2021)·12 citations
11. 11*

    ALP Search Using Precessing Light in a Magnetized Fabry Perot Cavity

    Richard Creswick🇺🇸 · Frank T. Avignone III🇺🇸

    In this paper we outline an experiment to detect the conversion of photons to axion-like particles (ALPs) in a strong magnetic field. We show that by modulating the polarization of the light passing through a Fabry-Perot cavity so that it effectively precesses at the modulation frequency, a signal is produced that is proportional to the square as opposed to the fourth power of the ALP-photon coupling constant. Assuming shot noise to be the dominant source of noise, we estimate that this approach is sensitive ALP masses less than $10^{-4}eV$ and couplings on the order to $g_{a\gamma }\sim 1.6\times 10^{-11}{\text{GeV}}^{-1}$ with a 10m, 10 T magnet, and $g_{a\gamma }\sim 1.6\times 10^{-12}{\text{GeV}}^{-1}$ with a 100 m magnet as envisaged by ALPs-IIc. ALPs with these properties have been invoked to explain the apparent transparency of the extragalactic background light (EBL) to ultra high-energy gamma rays emitted by BLAZARs.

    hep-phastro-ph.COhep-exJCAP(2022)·1 citation
12. 12*

    Cutoff dependence of the thrust peak position in the dipole shower

    Robin Baumeister🇩🇪 · Stefan Weinzierl🇩🇪

    We analyse the dependence of the peak position of the thrust distribution on the cutoff value in the Nagy-Soper dipole shower. We compare the outcome of the parton shower simulations to a relation of the dependence from an analytic computation, derived within soft-collinear effective theory. We show that the result of the parton shower simulations and the analytic computation are in good agreement.

    hep-phEPJC(2020)·6 citations
13. 13*

    Analytic double-soft integrated subtraction terms for two massive emitters in a back-to-back kinematics

    Wojciech Bizon🇩🇪 · Maximilian Delto🇩🇪

    We consider the double-soft limit of QCD amplitudes with two massive quarks in a back-to-back kinematics accompanied by two soft partons. We integrate analytically the respective double-soft eikonal functions over the phase space of the two soft partons. Within the context of the nested soft-collinear subtraction scheme, our results may serve as one of the integrated subtraction terms needed for the analytic and fully-differential description of next-to-next-to-leading order (NNLO) QCD corrections to colour-singlet decay into massive partons or to heavy-quark pair production.

    hep-phJHEP(2020)·10 citations
14. 14*

    How to suppress exponential growth -- on the parametric resonance of photons in an axion background

    Ariel Arza🇷🇺 · Thomas Schwetz🇩🇪 · Elisa Todarello🇩🇪

    Axion--photon interactions can lead to an enhancement of the electromagnetic field by parametric resonance in the presence of a cold axion background, for modes with a frequency close to half the axion mass. In this paper, we study the role of the axion momentum dispersion as well as the effects of a background gravitational potential, which can detune the resonance due to gravitational redshift. We show, by analytical as well as numerical calculations, that the resonance leads to an exponential growth of the photon field only if (a) the axion momentum spread is smaller than the inverse resonance length, and (b) the gravitational detuning distance is longer than the resonance length. For realistic parameter values, both effects strongly suppress the resonance and prevent the exponential growth of the photon field. In particular, the redshift due to the gravitational potential of our galaxy prevents the resonance from developing for photons in the observable frequency range, even assuming that all the dark matter consists of a perfectly cold axion condensate. For axion clumps with masses below $\sim 10^{-13}{M}_{\odot }$, the momentum spread condition is more restrictive, whereas, for more massive clumps, the redshift condition dominates.

    hep-phastro-ph.COastro-ph.HEJCAP(2020)·50 citations
15. 15*

    Nuclear matter as a liquid phase of spontaneously broken semi-classical $SU(2{)}_L\times SU(2{)}_R$ chiral perturbation theory: Static chiral nucleon liquids

    Bryan W. Lynn🇺🇸 · Brian J. Coffey🇺🇸 · Kellen E. McGee🇺🇸 · Glenn D. Starkman🇺🇸

    We study effective field theories (EFT) of nuclear structure based on spontaneously broken global $SU(2{)}_L\times SU(2{)}_R$ chiral symmetry of QCD with two massless quarks, i.e. $SU(2)\chi PT$. For ground-state nuclei, this EFT enables expansion and truncation in inverse powers of ${\Lambda }_{\chi SB}\simeq 1GeV$, with analytic operators renormalized to all loop orders. We derive the EFT Lagrangian to order ${\Lambda }_{\chi SB}^0$. We show that $SU(2)\chi PT$ of protons, neutrons and pions admits a semi-classical "Static Chiral Nucleon Liquid" (Static$\chi$NL) phase and that "Pion-less" $SU(2)\chi PT$ emerges in this liquid: far-infrared pions decouple from Static$\chi$NL, vastly simplifying the derivation of saturated nuclear matter (the infinite liquid phase) and of finite microscopic liquid drops (ground-state nuclides). Static$\chi$NL are made entirely of nucleons with even parity, total spin zero, and even $Z$ and $N$; local expectation values for spin and momenta vanish. They explain the power of pion-less $SU(2)\chi PT$ to capture experimental ground-state properties of certain nuclides, this explanation following directly from the global symmetries of QCD with two massless quarks. Mean-field Static$\chi$NL non-topological solitons are true solutions of $SU(2)\chi PT$'s semi-classical symmetries: they obey all CVC and PCAC conservation laws and they have zero internal and external pressure. The nuclear liquid-drop model and the semi-empirical mass formula emerge -- with correct nuclear density and saturation and asymmetry energies -- in an explicit Thomas-Fermi construction. We relate our work to compatible and complementary work in pionless and in halo/ cluster EFTs, also composed entirely of nucleons and applied to light ($A\le 6$) nuclei, which might provide important (<12.5%) corrections to Static$\chi NL$.

    hep-phnucl-thPRC(2022)·1 citation
16. 16*

    Classical Decay Rates of Oscillons

    Hong-Yi Zhang🇺🇸 · Mustafa A. Amin🇺🇸 · Edmund J. Copeland🇬🇧 · Paul M. Saffin🇬🇧 · Kaloian D. Lozanov🇩🇪

    Oscillons are extremely long-lived, spatially-localized field configurations in real-valued scalar field theories that slowly lose energy via radiation of scalar waves. Before their eventual demise, oscillons can pass through (one or more) exceptionally stable field configurations where their decay rate is highly suppressed. We provide an improved calculation of the non-trivial behavior of the decay rates, and lifetimes of oscillons. In particular, our calculation correctly captures the existence (or absence) of the exceptionally long-lived states for large amplitude oscillons in a broad class of potentials, including non-polynomial potentials that flatten at large field values. The key underlying reason for the improved (by many orders of magnitude in some cases) calculation is the systematic inclusion of a spacetime-dependent effective mass term in the equation describing the radiation emitted by oscillons (in addition to a source term). Our results for the exceptionally stable configurations, decay rates, and lifetime of large amplitude oscillons (in some cases $\gtrsim 10^8$ oscillations) in such flattened potentials might be relevant for cosmological applications.

    ↳ hep-thhep-phnlin.PSJCAP(2020)·101 citations
17. 17*

    Fitting string inflation to real cosmological data: the Fibre Inflation case

    Michele Cicoli🇮🇹 · Eleonora Di Valentino🇬🇧

    In this paper we show how the string landscape can be constrained using observational data. We illustrate this idea by focusing on Fibre Inflation which is a promising class of string inflationary models in type IIB flux compactifications. We determine the values of the microscopic flux-dependent parameters which yield the best fit to the most recent cosmological datasets.

    ↳ astro-ph.COgr-qchep-phhep-thPRD(2020)·44 citations
18. 18*

    Worldline master formulas for the dressed electron propagator, part 1: Off-shell amplitudes

    Naser Ahmadiniaz🇩🇪 · Victor Miguel Banda Guzman🇲🇽 · Fiorenzo Bastianelli🇮🇹 · Olindo Corradini🇮🇹 · James P. Edwards🇲🇽 · Christian Schubert🇲🇽

    In the first-quantised worldline approach to quantum field theory, a long-standing problem has been to extend this formalism to amplitudes involving open fermion lines while maintaining the efficiency of the well-tested closed-loop case. In the present series of papers, we develop a suitable formalism for the case of quantum electrodynamics in vacuum (part one and two) and in a constant external electromagnetic field (part three), based on second-order fermions and the symbol map. We derive this formalism from standard field theory, but also give an alternative derivation intrinsic to the worldline theory. In this first part, we use it to obtain a Bern-Kosower type master formula for the fermion propagator, dressed with $N$ photons, in terms of the "$N$-photon kernel," where off-shell this kernel appears also in "subleading" terms involving only $N-1$ of the $N$ photons. Although the parameter integrals generated by the master formula are equivalent to the usual Feynman diagrams, they are quite different since the use of the inverse symbol map avoids the appearance of long products of Dirac matrices. As a test we use the $N=2$ case for a recalculation of the one-loop fermion self energy, in $D$ dimensions and arbitrary covariant gauge, reproducing the known result. We find that significant simplification can be achieved in this calculation choosing an unusual momentum-dependent gauge parameter.

    ↳ hep-thhep-phJHEP(2020)·50 citations
19. 19*

    Interpolation of Dense and Sparse Rational Functions and other Improvements in $\text{FireFly}$

    Jonas Klappert🇩🇪 · Sven Yannick Klein🇩🇪 · Fabian Lange🇩🇪

    We present the main improvements and new features in version $\text{2.0}$ of the open-source $\text{C++}$ library $\text{FireFly}$ for the interpolation of rational functions. This includes algorithmic improvements, e.g. a hybrid algorithm for dense and sparse rational functions and an algorithm to identify and remove univariate factors. The new version is applied to a Feynman-integral reduction to showcase the runtime improvements achieved. Moreover, $\text{FireFly}$ now supports parallelization with $\text{MPI}$ and offers new tools like a parser for expressions or an executable for the insertion of replacement tables.

    ↳ cs.MScs.SChep-phComput.Phys.Commun.(2021)·160 citations
20. 20*

    Parton Distribution Functions from Ioffe Time Pseudodistributions from Lattice Calculations: Approaching the Physical Point

    Bálint Joó🇺🇸 · Joseph Karpie🇺🇸 · Kostas Orginos🇺🇸 · Anatoly V. Radyushkin🇺🇸 · David G. Richards🇺🇸 · Savvas Zafeiropoulos🇫🇷

    We present results for the unpolarized parton distribution function of the nucleon computed in lattice QCD at the physical pion mass. This is the first study of its kind employing the method of Ioffe time pseudo-distributions. Beyond the reconstruction of the Bjorken-$x$ dependence we also extract the lowest moments of the distribution function using the small Ioffe time expansion of the Ioffe time pseudo-distribution. We compare our findings with the pertinent phenomenological determinations.

    ↳ hep-lathep-phnucl-thPRL(2020)·103 citations
21. 21*

    Parkes transient events: I. Database of single pulses, initial results and missing FRBs

    S.-B. Zhang🇨🇳 · G. Hobbs🇦🇺 · C. J. Russell🇦🇺 · L. Toomey🇦🇺 · S. Dai🇦🇺 · J. Dempsey🇦🇺 · R. N. Manchester🇦🇺 · S. Johnston🇺🇸 · L. Staveley-Smith🇦🇺 · X.-F. Wu🇨🇳 · D. Li🇨🇳 · Y.-Y. Yang🇨🇳 and 7 other authors

    A large number of observations from the Parkes 64\,m-diameter radio telescope, recorded with high time resolution, are publicly available. We have re-processed all of the observations obtained during the first four years (from 1997 to 2001) of the Parkes Multibeam receiver system in order to identify transient events and have built a database that records the 568,736,756 pulse candidates generated during this search. We have discovered a new fast radio burst (FRB), FRB~010305, with a dispersion measure of 350$\pm$5\,\,cm${}^{-3}$pc and explored why so few FRBs have been discovered in data prior to 2001. After accounting for the dispersion smearing across the channel bandwidth and the sky regions surveyed, the number of FRBs is found to be consistent with model predictions. We also present five single pulse candidates from unknown sources, but with Galactic dispersion measures. We extract a diverse range of sources from the database, which can be used, for example, as a training set of data for new software being developed to search for FRBs in the presence of radio frequency interference.

    ↳ astro-ph.HEastro-ph.IMhep-phAstrophys.J.Supp.(2020)·11 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.