Tue·Feb 12, 2019Tuesday·February 12, 2019

1. 01*

   Production of $X(3872)$ Accompanied by a Pion in $B$ Meson Decay

   Eric Braaten🇺🇸 · Li-Ping He🇺🇸 · Kevin Ingles🇺🇸

   If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced by the creation of $D^{\ast 0}{\bar{D}}^0$ or $D^0{\bar{D}}^{\ast 0}$ at short distances followed by the formation of the bound state from the charm-meson pairs. It can also be produced by the creation of $D^{\ast }{\bar{D}}^{\ast }$ at short distances followed by the rescattering of the charm mesons into $X\pi$. We use results of a previous isospin analysis of $B$ meson decays into $K{D}^{(\ast )}{\bar{D}}^{(\ast )}$ to estimate the short-distance amplitudes for creating $D^{\ast }{\bar{D}}^{\ast }$. We use an effective field theory for charm mesons and pions called XEFT to calculate the amplitudes for rescattering of $D^{\ast }{\bar{D}}^{\ast }$ into $X\pi$ with small relative momentum. The $X\pi$ invariant mass distribution is predicted to have a narrow peak near the $D^{\ast }{\bar{D}}^{\ast }$ threshold from a charm-meson triangle singularity. We estimate the branching fractions into the peak from the triangle singularity for the decays $B^0\to K^{+}X{\pi }^{-}$ and $B^{+}\to K^{0}X{\pi }^{+}$.

   hep-phPRD(2019)·28 citations
2. 02*

   Reactor Neutrinos: Toward Oscillations

   Petr Vogel🇺🇸

   I shall sketch the history of reactor neutrino physics over five decades since the Reines-Cowan proof of neutrino existence in the late 50s, till the advent of the present era of precision reactor neutrino oscillation experiments. There are three chapters of this story: i) Exploration of possibilities of the reactor neutrinos in the 60s and 70s; ii) Looking for oscillations under the streetlamp in the 80s and 90s; iii) Exploring oscillations in detail with known (almost) $\Delta m_{atm}^2$ and $\Delta m_{sol}^2$.}

   hep-phnucl-exnucl-thphysics.ins-det1 citation
3. 03*

   Meson-baryon Scattering in Extend-on-mass-shell scheme at $\mathcal{O}(p^3)$

   Junxu Lu (1 and 2)🇨🇳 · Lisheng Geng (1)🇨🇳 · Xiulei Ren (3)🇩🇪 · Menglin Du (4) ((1) Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing, China, (2) Groupe de Physique Théorique, IPN, Université Paris-Sud 11, Orsay, France, (3) Institut für Theoretische Physik II, Ruhr-Universität Bochum, (4) Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn)🇩🇪

   In this present work, we study the scattering of a pseudoscalar meson off one ground state octet baryon in covariant baryon chiral perturbation theory up to the next-to-next-to-leading order. We remove the power counting breaking terms with the extended-on-mass-shell scheme. We perform the first combined study of the pion-nucleon and kaon-nucleon scattering data and show that the covariant baryon Chiral perturbation theory can provide a reasonable description of the experimental data for both channels.

   hep-ph0 citations
4. 04*

   Coherence length of neutrino oscillations in quantum field-theoretical approach

   Vadim O. Egorov🇷🇺 · Igor P. Volobuev🇷🇺

   We consider a novel quantum field-theoretical approach to the description of processes passing at finite space-time intervals based on the Feynman diagram technique in the coordinate representation. The most known processes of this type are neutrino and neutral kaon oscillations. The experimental setting of these processes requires one to adjust the rules of passing to the momentum representation in the Feynman diagram technique in accordance with it, which leads to a modification of the Feynman propagator in the momentum representation. The approach does not make use of wave packets, both initial and final particle states are described by plane waves, which simplifies the calculations considerably. We consider neutrino oscillation processes, where the neutrinos are produced in three-particle weak decays of nuclei and detected in the charged-current interaction with nuclei or in the charged- and neutral-current interactions with electrons. Particular examples are considered and it is shown that the momentum spread of the produced neutrinos and the energy dependence of the differential cross section of the detection process result in the suppression of neutrino oscillation, which is characterized by a coherence length specific for a pair of production and detection processes. This coherence length turns out to be much less than the coherence length in the standard quantum-mechanical approach defined by the quantum uncertainty of neutrino momentum.

   hep-phnucl-thPRD(2019)·18 citations
5. 05*

   Spin asymmetry in single pion production induced by weak interactions of neutrinos with polarized nucleons

   Krzysztof M. Graczyk🇵🇱 · Beata E. Kowal🇵🇱

   The single pion production (SPP) in the charged-current neutrino (antineutrino) scattering off the polarized nucleon is discussed. The spin asymmetry is predicted within two approaches. The spin polarizations of the target nucleon that are longitudinal and perpendicular to the neutrino momentum are considered. It is shown, in several examples, that information about the SPP dynamics coming from the spin asymmetry is complementary to information obtained from measurements of spin averaged cross section. Indeed, the spin asymmetry is sensitive to the nonresonance background description of the SPP model. For the normal polarization of the target, the spin asymmetry is given by the interference between the resonance and the nonresonance contributions.

   hep-phPRD(2019)·9 citations
6. 06*

   Longitudinal spin asymmetries in polarized deuteron DIS with spectator tagging

   W. Cosyn🇧🇪 · C. Weiss🇺🇸

   Polarized electron-deuteron DIS with spectator proton tagging offers a way of measuring the neutron spin structure functions with maximal theoretical control of nuclear effects. We calculate the nuclear structure factors in the longitudinal double-spin asymmetries using methods of light-front nuclear structure. A unique feature of the spin-1 system is that spin asymmetries can be formed either relative to the cross section in all three spin states (${\lambda }_d=\pm 1,0$) or in the two maximum-spin states only ($\pm 1$, involving tensor polarization). We find that the two-state deuteron spin asymmetry at small spectator proton momenta permits accurate extraction of the neutron structure function $g_{1n}$. Such measurements could be performed at a future electron-ion collider (EIC) with polarized deuteron beams and suitable forward detectors.

   hep-phnucl-exnucl-thPoS(2019)·0 citations
7. 07*

   Deuteron helicity flip generalized parton distributions in a convolution model

   W. Cosyn🇧🇪 · B. Pire🇫🇷

   We discuss the general properties of generalized parton distributions with helicity flip (transversity) for spin-1 hadrons in the leading twist case. Using a basic light cone convolution model, we show the deuteron helicity amplitudes containing quark helicity flip GPDs and comment on the role deuteron angular momentum plays in these.

   hep-phnucl-thJPS Conf.Proc.(2019)·1 citation
8. 08*

   Unitary inflaton as decaying dark matter

   Soo-Min Choi🇰🇷 · Yoo-Jin Kang🇰🇷 · Hyun Min Lee🇰🇷 · Kimiko Yamashita🇹🇼

   We consider the inflation model of a singlet scalar field (sigma field) with both quadratic and linear non-minimal couplings where unitarity is ensured up to the Planck scale. We assume that a $Z_2$ symmetry for the sigma field is respected by the scalar potential in Jordan frame but it is broken explicitly by the linear non-minimal coupling due to quantum gravity. We discuss the impacts of the linear non-minimal coupling on various dynamics from inflation to low energy, such as a sizable tensor-to-scalar ratio, a novel reheating process with quartic potential dominance, and suppressed physical parameters in the low energy, etc. In particular, the linear non-minimal coupling leads to the linear couplings of the sigma field to the Standard Model through the trace of the energy-momentum tensor in Einstein frame. Thus, regarding the sigma field as a decaying dark matter, we consider the non-thermal production mechanisms for dark matter from the decays of Higgs and inflaton condensate and show the parameter space that is compatible with the correct relic density and cosmological constraints.

   hep-phJHEP(2019)·45 citations
9. 09*

   Complementary bound on $W^{\prime }$ mass from Higgs to diphoton decay

   Triparno Bandyopadhyay🇮🇳 · Dipankar Das🇸🇪 · Roman Pasechnik🇸🇪 · Johan Rathsman🇸🇪

   Using the left-right symmetric model as an illustrative example, we suggest a simple and straightforward way of constraining the $W^{\prime }$ mass directly from the decay of the Higgs boson to two photons. The proposed method is generic and applicable to a diverse range of models with a $W^{\prime }$-boson that couples to the SM-like Higgs boson. Our analysis exemplifies how the precision measurement of the Higgs to diphoton signal strength can have a pivotal role in probing the scale of new physics.

   hep-phPRD(2019)·6 citations
10. 10*

    Impact of an eV-mass sterile neutrino on the neutrinoless double-beta decays: a Bayesian analysis

    Guo-yuan Huang🇨🇳 · Shun Zhou🇨🇳

    To quantitatively assess the impact of an eV-mass sterile neutrino on the neutrinoless double-beta ($0\nu \beta \beta$) decays, we calculate the posterior probability distribution of the relevant effective neutrino mass $|m_{ee}^{\prime }|$ in the (3+1)$\nu$ mixing scenario, following the Bayesian statistical approach. The latest global-fit analysis of neutrino oscillation data, the cosmological bound on the sum of three active neutrino masses from {\it Planck}, and the constraints from current $0\nu \beta \beta$ decay experiments are taken into account in our calculations. Based on the resultant posterior distributions, we find that the average value of the effective neutrino mass is shifted from $\overline{|m_{ee}^{}|}=3.37\times 10^{-3}\mathrm{eV}$ (or $7.71\times 10^{-3}\mathrm{eV}$) in the standard 3$\nu$ mixing scenario to $\overline{|m_{ee}^{\prime }|}=2.54\times 10^{-2}\mathrm{eV}$ (or $2.56\times 10^{-2}\mathrm{eV}$) in the (3+1)$\nu$ mixing scenario, with the logarithmically uniform prior on the lightest neutrino mass (or on the sum of three active neutrino masses). Therefore, a null signal from the future $0\nu \beta \beta$ decay experiment with a sensitivity to $|m_{ee}^{}|\approx \mathcal{O}(10_{}^{-2})\mathrm{eV}$ will be able to set a very stringent constraint on the sterile neutrino mass and the active-sterile mixing angle.

    hep-phNPB(2019)·16 citations
11. 11*

    Thermodynamics of 2+1 Flavor Polyakov-Loop Quark-Meson Model under External Magnetic Field

    Xiang Li🇨🇳 · Wei-jie Fu🇨🇳 · Yu-xin Liu🇨🇳

    We study the thermodynamics of QCD system under external magnetic field via the 2+1 flavor Polyakov-loop quark-meson model. To incorporate quantum and thermal fluctuations, the functional renormalization group approach is implemented in our work. Pressure, entropy density, magnetic susceptibility and other thermodynamic quantities are calculated and analyzed to investigate the effect of magnetic field on the QCD system. The calculated results are in reasonable agreement with lattice QCD simulations and perturbation theory. We then give an intuitive picture for the response of QCD system to the magnetic field.

    hep-phPRD(2019)·26 citations
12. 12*

    Entangled Neutrino States in a Toy Model QFT

    Emilio Ciuffoli🇨🇳 · Jarah Evslin🇨🇳 · Hosam Mohammed🇨🇳 · Yao Zhou🇨🇳

    It has been claimed that wave packets must be covariant and also that decohered neutrino oscillations are always revived during measurement. These conjectures are supported by general arguments which are not specific to the electroweak theory, and so if they are true for neutrinos they will also be true for simplified models. In this paper we produce such a simplified model in which the neutrino wave function, including its entanglement with the source particle and the environment, can be calculated explicitly in quantum field theory. It exhibits neutrino oscillation, which is reduced at late times by decoherence due to interactions of the source with the environment. One simple lesson from this model is that only the difference between the environmental interactions before and after neutrino emission can reduce the amplitude of neutrino oscillations. The model will be used to test the conjectures in a companion paper.

    hep-phEPJC(2019)·9 citations
13. 13*

    Standard Model Physics at the HL-LHC and HE-LHC

    P. Azzi🇮🇹 · S. Farry🇬🇧 · P. Nason🇮🇹 · A. Tricoli🇺🇸 · D. Zeppenfeld🇩🇪 · R. Abdul Khalek🇳🇱 · J. Alimena🇺🇸 · N. Andari🇫🇷 · L. Aperio Bella🇨🇭 · A.J. Armbruster🇨🇭 · J. Baglio🇩🇪 · S. Bailey🇬🇧 and 214 other authors

    The successful operation of the Large Hadron Collider (LHC) and the excellent performance of the ATLAS, CMS, LHCb and ALICE detectors in Run-1 and Run-2 with $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV as well as the giant leap in precision calculations and modeling of fundamental interactions at hadron colliders have allowed an extraordinary breadth of physics studies including precision measurements of a variety physics processes. The LHC results have so far confirmed the validity of the Standard Model of particle physics up to unprecedented energy scales and with great precision in the sectors of strong and electroweak interactions as well as flavour physics, for instance in top quark physics. The upgrade of the LHC to a High Luminosity phase (HL-LHC) at 14 TeV center-of-mass energy with 3 ab${}^{-1}$ of integrated luminosity will probe the Standard Model with even greater precision and will extend the sensitivity to possible anomalies in the Standard Model, thanks to a ten-fold larger data set, upgraded detectors and expected improvements in the theoretical understanding. This document summarises the physics reach of the HL-LHC in the realm of strong and electroweak interactions and top quark physics, and provides a glimpse of the potential of a possible further upgrade of the LHC to a 27 TeV $pp$ collider, the High-Energy LHC (HE-LHC), assumed to accumulate an integrated luminosity of 15 ab${}^{-1}$.

    hep-phCERN Yellow Rep.Monogr.(2019)·320 citations
14. 14*

    Exclusive double $B_c$ meson production from $e^{+}{e}^{-}$ annihilation into two virtual photons

    A.V. Berezhnoy🇷🇺 · A.P. Martynenko🇷🇺 · F.A. Martynenko🇷🇺 · O.S. Sukhorukova🇷🇺

    We calculate cross sections of a pair $B_c$ meson production on the basis of two-photon mechanism from electron-positron annihilation. We investigate the production cross sections in nonrelativistic approximation and with the account of relativistic corrections. Relativistic production amplitudes of S-wave pair pseudoscalar, vector and pseudoscalar+vector $B_c$-mesons are constructed on the basis of relativistic quark model. Numerical values of the production cross sections are obtained at different center-of-mass energies. The comparison of one-photon and two-photon annihilation contributions is presented.

    hep-phNPA(2019)·11 citations
15. 15*

    Constraining the Effective Mass of Majorana Neutrino with Sterile Neutrino Mass for Inverted Ordering Spectrum

    Jaydip Singh🇮🇳

    Inspired by the experimental anomalies in neutrino physics and recent oscillation data from short baseline and another neutrino experiment, the realization of one extra neutrino flavor seem to be favoring. This extra flavor may change the observable, $|m_{\beta \beta }|$ of currently data taking and next-generation $(\beta \beta {)}_{0\nu }$-decay experiments aim to probe and possibly look the Inverted Ordering region($|m_{\beta \beta }|\simeq 10^{-2}$eV) of parameter space. This observation would allow establishing physics beyond the standard model and phenomena like lepton number violation and Majorana nature of neutrino. The range of this observable ($|m_{\beta \beta }|$) is not very well defined for both the ordering of mass spectrum(Normal Ordering and Inverted Ordering). Several attempts have been made for defining exactly the range for three active neutrino states. For contrasting this range, I have worked with an extra mass states, ${\nu }_4$ and its effect on the observable with various combination of CP violation Majorana phases by taking into account the updated data on the neutrino oscillation parameters for IO case. Based on the Monte Carlo technique, a parameter region is obtained using the fourth Majorana-Dirac phase of sterile parameters that lead to an effective mass below 0.01 eV or .05 eV for inverted mass ordering case which is planned to be observed in the near future experiment.

    hep-phAdv.High Energy Phys.(2019)·8 citations
16. 16*

    Confirming the Existence of the strong CP Problem in Lattice QCD with the Gradient Flow

    Jack Dragos🇺🇸 · Thomas Luu🇩🇪 · Andrea Shindler🇺🇸 · Jordy de Vries🇺🇸 · Ahmed Yousif🇺🇸

    We calculate the electric dipole moment of the nucleon induced by the QCD theta term. We use the gradient flow to define the topological charge and use $N_f=2+1$ flavors of dynamical quarks corresponding to pion masses of $700$, $570$, and $410$ MeV, and perform an extrapolation to the physical point based on chiral perturbation theory. We perform calculations at $3$ different lattice spacings in the range of $0.07\mathrm{fm}<a<0.11$ fm at a single value of the pion mass, to enable control on discretization effects. We also investigate finite size effects using $2$ different volumes. A novel technique is applied to improve the signal-to-noise ratio in the form factor calculations. The very mild discretization effects observed suggest a continuum-like behavior of the nucleon EDM towards the chiral limit. Under this assumption our results read $d_n=-0.00152(71)\bar{\theta }e\text{fm}$ and $d_p=0.0011(10)\bar{\theta }e\text{fm}$. Assuming the theta term is the only source of CP violation, the experimental bound on the neutron electric dipole moment limits $\left|\bar{\theta }\right|<1.98\times 10^{-10}$ ($90\%$ CL). A first attempt at calculating the nucleon Schiff moment in the continuum resulted in $S_p=0.50(59)\times 10^{-4}\bar{\theta }e{\text{fm}}^3$ and $S_n=-0.10(43)\times 10^{-4}\bar{\theta }e{\text{fm}}^3$.

    ↳ hep-lathep-phPRC(2021)·154 citations
17. 17*

    Including off-diagonal anisotropies in anisotropic hydrodynamics

    Mohammad Nopoush🇺🇸 · Michael Strickland🇺🇸

    In this paper we present a method for efficiently including the effects of off-diagonal local rest frame momentum anisotropies in leading-order anisotropic hydrodynamics. The method relies on diagonalization of the space-like block of the anisotropy tensor and allows one to reduce the necessary moments of the distribution function in the off-diagonal case to a linear combination of diagonal-anisotropy integrals. Once reduced to diagonal-anisotropy integrals, the results can be computed efficiently using techniques described previously in the literature. We present a general framework for how to accomplish this and provide examples for off-diagonal anisotropy moments entering into the energy-momentum tensor and viscous update equations which emerge when performing anisotropic pressure matching.

    ↳ nucl-thhep-phPRC(2019)·16 citations
18. 18*

    The Degree of Fine-Tuning in our Universe -- and Others

    Fred C. Adams🇺🇸

    (abridged) Both fundamental constants that describe the laws of physics and cosmological parameters that determine the cosmic properties must fall within a range of values in order for the universe to develop astrophysical structures and ultimately support life. This paper reviews current constraints on these quantities. The standard model of particle physics contains both coupling constants and particle masses, and the allowed ranges of these parameters are discussed first. We then consider cosmological parameters, including the total energy density, the vacuum energy density, the baryon-to-photon ratio, the dark matter contribution, and the amplitude of primordial density fluctuations. These quantities are constrained by the requirements that the universe lives for a long time, emerges from the BBN epoch with an acceptable chemical composition, and can successfully produce galaxies. On smaller scales, stars and planets must be able to form and function. The stars must have sufficiently long lifetimes and hot surface temperatures. The planets must be massive enough to maintain an atmosphere, small enough to remain non-degenerate, and contain enough particles to support a complex biosphere. These requirements place constraints on the gravitational constant, the fine structure constant, and composite parameters that specify nuclear reaction rates. We consider specific instances of possible fine-tuning in stars, including the triple alpha reaction that produces carbon, as well as the effects of unstable deuterium and stable diprotons. For all of these issues, viable universes exist over a range of parameter space, which is delineated herein. Finally, for universes with significantly different parameters, new types of astrophysical processes can generate energy and support habitability.

    ↳ astro-ph.COhep-phhep-thPhys.Rept.(2019)·41 citations
19. 19*

    Beyond the Standard Model Physics at the High Luminosity LHC

    Sezen Sekmen (for the ATLAS and CMS Collaborations)🇰🇷

    The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb${}^{-1}$. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (pileup) superimposed to each event of interest, thus providing extremely challenging experimental conditions, which will be addressed by accompanying improvements in the decetors. The sensitivity to find new physics Beyond the Standard Model (BSM) is significantly improved and will allow to extend the reach for SUSY, heavy exotic resonances, vector like quarks, dark matter and exotic long-lived signatures, to name a few. This note summarizes several ATLAS and CMS studies performed to asses HL-LHC sensitivity to various BSM models and signatures.

    ↳ hep-exhep-phPoS(2019)·2 citations
20. 20*

    Inflation after Planck: Judgment Day

    Debika Chowdhury🇮🇳 · Jerome Martin🇫🇷 · Christophe Ringeval🇫🇷 · Vincent Vennin🇫🇷

    Inflation is considered as the best theory of the early universe by a very large fraction of cosmologists. However, the validity of a scientific model is not decided by counting the number of its supporters and, therefore, this dominance cannot be taken as a proof of its correctness. Throughout its history, many criticisms have been put forward against inflation. The final publication of the Planck Cosmic Microwave Background data represents a benchmark time to study their relevance and to decide whether inflation really deserves its supremacy. In this paper, we categorize the criticisms against inflation, go through all of them in the light of what is now observationally known about the early universe, and try to infer and assess the scientific status of inflation. Although we find that important questions still remain open, we conclude that the inflationary paradigm is not in trouble but, on the contrary, has rather been strengthened by the Planck data.

    ↳ astro-ph.COgr-qchep-phhep-thPRD(2019)·120 citations
21. 21*

    String breaking by light and strange quarks in QCD

    John Bulava🇩🇰 · Ben Hörz🇩🇪 · Francesco Knechtli🇩🇪 · Vanessa Koch🇩🇪 · Graham Moir🇬🇧 · Colin Morningstar🇺🇸 · Mike Peardon🇮🇪

    The energy spectrum of a system containing a static quark anti-quark pair is computed for a wide range of source separations using lattice QCD with $N_{\mathrm{f}}=2+1$ dynamical flavours. By employing a variational method with a basis including operators resembling both the gluon string and systems of two separated static mesons, the first three energy levels are determined up to and beyond the distance where it is energetically favourable for the vacuum to screen the static sources through light- or strange-quark pair creation, enabling both these screening phenomena to be observed. The separation dependence of the energy spectrum is reliably parameterised over this saturation region with a simple model which can be used as input for subsequent investigations of quarkonia above threshold and heavy-light and heavy-strange coupled-channel meson scattering.

    ↳ hep-lathep-phPLB(2019)·117 citations
22. 22*

    Constructing stable de Sitter in M-theory from higher curvature corrections

    Johan Blåbäck🇮🇹 · Ulf Danielsson🇸🇪 · Giuseppe Dibitetto🇸🇪 · Suvendu Giri🇸🇪

    We consider dimensional reductions of M-theory on ${\mathbb{T}}^7/{\mathbb{Z}}_2^3$ with the inclusion of arbitrary metric flux and spacetime filling KK monopoles. With these ingredients at hand, we are able to construct a novel family of non-supersymmetric yet tachyon free Minkowski extrema. These solutions are supported by pure geometry with no extra need for gauge fluxes and possess a fully stable perturbative mass spectrum, up to a single flat direction. Such a direction corresponds to the overall internal volume, with respect to which the scalar potential exhibits a no-scale behavior. We then provide a mechanism that lifts the flat direction to give it a positive squared mass while turning Mkw${}_4$ into dS${}_4$. The construction makes use of the combined effect of $G_7$ flux and higher curvature corrections. Our solution is scale separated and the quantum corrections are small. Finally we speculate on novel possibilities when it comes to scale hierarchies within a given construction of this type, and possible issues with the choice of quantum vacuum.

    ↳ hep-thhep-phJHEP(2019)·26 citations
23. 23*

    Primordial Black Holes and Co-Decaying Dark Matter

    Julian Georg🇺🇸 · Brandon Melcher🇺🇸 · Scott Watson🇺🇸

    Models of Co-Decaying dark matter lead to an early matter dominated epoch -- prior to BBN -- which results in an enhancement of the growth of dark matter substructure. If these primordial structures collapse further they can form primordial black holes providing an additional dark matter candidate. We derive the mass fraction in these black holes (which is not monochromatic) and consider observational constraints on how much of the dark matter could be comprised in these relics. We find that in many cases they can be a significant fraction of the dark matter. Interestingly, the masses of these black holes can be near the solar-mass range providing a new mechanism for producing black holes like those recently detected by LIGO.

    ↳ astro-ph.COgr-qchep-phhep-thJCAP(2019)·16 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.