Thu·Sep 5, 2019Thursday·September 5, 2019

1. 01*

   Freeze-in Production of Dark Matter Prior to Early Matter Domination

   Rouzbeh Allahverdi🇺🇸 · Jacek K. Osiński🇺🇸

   Freeze-out or freeze-in during a period of early matter domination can yield the correct dark matter abundance for small values of the velocity-averaged annihilation cross section, $⟨{\sigma }_{\mathrm{ann}}v{⟩}_{\mathrm{f}}<3\times 10^{-26}$ cm${}^3$ s${}^{-1}$. However, in a generic non-standard thermal history, such a period is typically preceded by other phases. Here, we study production of dark matter in a simple post-inflationary history where a radiation-dominated phase after reheating is followed by an epoch of early matter domination. Focusing on the freeze-in regime, we show that dark matter production prior to early matter domination can dominate the relic abundance in large parts of the parameter space, including weak scale dark matter masses, and the allowed regions are highly dependent on the entire post-inflationary history. Moreover, for a very broad range of $⟨{\sigma }_{\mathrm{ann}}v{⟩}_{\mathrm{f}}$ spanning over several decades, dark matter particles can start in chemical equilibrium early on and decouple during early matter domination, thereby rendering the relic abundance essentially independent of $⟨{\sigma }_{\mathrm{ann}}v{⟩}_{\mathrm{f}}$. We briefly discuss connections to different observables as a possible means to test the elusive freeze-in scenario in this case.

   hep-phastro-ph.COhep-thPRD(2020)·25 citations
2. 02*

   Distinguishing Dirac from Majorana neutrinos in a microwave cavity

   Mehdi Abdi (IUT)🇮🇷 · Roohollah Mohammadi (INMOST & SoA-IPM)🇮🇷 · She-Sheng Xue (ICRANet)🇮🇹 · Moslem Zarei (IUT)🇮🇷

   We propose a novel scheme for distinguishing between the Dirac and Majorana nature of neutrinos via interaction of a neutrino beam with microwave photons inside a cavity. We study the effective photon-photon polarization exchange induced by the photon-neutrino scattering. The quantum field theoretical studies of such effective picture are presented for both Dirac and Majorana neutrinos. Our phenomenological analyses show that the difference between Dirac and Majorana neutrinos can manifest itself in scattering rate of the photons. To enhance the effect a cavity scheme is employed. An experimental setup based on microwave cavities is then designed and simulated by finite element method to measure the scattering rate. Our results suggest that an experiment based on the current state-of-the-art technology will be able to probe the difference in about one year. However, it can be done in a few days by enhancing the neutrino beam flux or implementing with the near future equipments. Therefore, our work provides the possibility %puts the grounds for solving the long lasting puzzle of Dirac or Majorana nature of neutrinos.

   hep-phquant-ph3 citations
3. 03*

   Precision measurements on ${\delta }_{\text{CP}}$ in MOMENT

   Jian Tang🇨🇳 · Sampsa Vihonen🇨🇳 · Tse-Chun Wang🇨🇳

   As it is very promising to expect a discovery of CP violation in the leptonic sector, the precision measurement of the Dirac CP phase ${\delta }_{\text{CP}}$ is going to be one of the key interests in the future neutrino oscillation experiments. In this work, we examine the physics reach of the proposed medium baseline muon decay experiment MOMENT. In order to identify potential bottlenecks and opportunities to improve CP precision in MOMENT, we investigate the effect of statistical error, systematic uncertainties, fraction of the muon beam polarity, and adjusting the baseline length to match the first or second oscillation maximum on the precision measurement of ${\delta }_{\text{CP}}$. We also simulate superbeam experiments T2K, NO$\nu$A, T2HK, DUNE and T2HKK in comparison and complementary to MOMENT. To reach the precision of ${\delta }_{\text{CP}}$ at 12${}^{\circ }$ or better at 1$\sigma$ confidence level, we find it sufficient to combine the data of MOMENT, DUNE and T2HK.

   hep-phJHEP(2019)·17 citations
4. 04*

   Testing Texture Two Zero Neutrino Mass Matrices Under Current Experimental Scenario

   Madan Singh🇮🇳

   The latest data from Planck collaboration has presented an improved sensitivity limit of the sum of neutrino masses ($\Sigma$), $\Sigma <0.17eV$ at 95$\%$ confidence level (CL). On the other hand, the updated global fits of neutrino oscillation have shown a refined range of atmospheric mixing angle ${\theta }_{23}$ at the same CL. In the light of these observations, we have re-investigated the five viable cases ( $B_{1,2,3,4}$ and $C$) of texture two zero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases $B_2$ and $B_4$ are now viable for normal mass ordering, while remaining three cases does not meet the present experimental constraints at 2$\sigma$ CL. The viable cases are also found to be in agreement with the latest T2K, Super-Kamiokande and NO$\nu$A results, indicating the preference for normal neutrino mass ordering ($m_1<m_2<m_3$), a maximal Dirac CP-violating phase ($\delta \simeq 270^0$), and upper octant of neutrino mixing angle (${\theta }_{23}>45^0$). In addition, the implication of $\Sigma$ on neutrinoless double beta decay is studied for viable cases.

   hep-phEPL(2020)·15 citations
5. 05*

   Phenomenological Study of Type II Seesaw with $\Delta (27)$ Symmetry

   Itishree Sethi (IIT Hyderabad)🇮🇳 · Sudhanwa Patra (IIT Bhilai)🇮🇳

   We discuss the phenomenology of type-II seesaw by extending the Standard Model with additional Higgs doublets and scalar triplets additionally invoked with $\Delta (27)$ flavor symmetry for the explanation of non-zero neutrino masses and mixings, matter-antimatter asymmetry and lepton flavor violation. The non-zero neutrino masses can be realized via type-II seesaw mechanism by introducing scalar triplets transforming as triplets under $\Delta (27)$ while we add additional $SU(2{)}_L$ scalar doublets to have correct charge lepton masses. We further demonstrate with detailed numerical analysis in agreement with neutrino oscillation data like non-zero reactor mixing angle, ${\delta }_{CP}$, the sum of the light neutrino masses, two mass squared differences and its implication to neutrinoless double beta decay. We also discuss on the matter-antimatter asymmetry of the universe through leptogenesis with the decay of TeV scale scalar triplets and variation of CP-asymmetry with input model parameters. Finally, we comment on implication to lepton flavor violating decays like $\mu \to e\gamma$, $\mu \to 3e$ processes.

   hep-phJ.Phys.G(2021)·10 citations
6. 06*

   A Dynamical Solution to the Axion Domain Wall Problem

   Masahiro Ibe🇯🇵 · Shin Kobayashi🇯🇵 · Motoo Suzuki🇯🇵 · Tsutomu T. Yanagida🇯🇵

   The domain wall problem and the isocurvature problem restrict possible combinations of axion models and inflation models. In this paper, we considered a new mechanism which solves those problems by dynamics of multiple scalar fields during/after inflation. The mechanism makes axion models with a non-trivial domain wall number compatible with inflation models with a large Hubble parameter, $H_I\gg 10^{7\text{mbox}-8}$GeV. The mechanism also avoids the isocurvature problem. This mechanism increases the freedom of choice of combinations of axion models and inflation models.

   hep-phPRD(2020)·12 citations
7. 07*

   HandyG -- rapid numerical evaluation of generalised polylogarithms in Fortran

   L. Naterop🇨🇭 · A. Signer🇨🇭 · Y. Ulrich🇨🇭

   Generalised polylogarithms naturally appear in higher-order calculations of quantum field theories. We present handyG, a Fortran 90 library for the evaluation of such functions, by implementing the algorithm proposed by Vollinga and Weinzierl. This allows fast numerical evaluation of generalised polylogarithms with currently relevant weights, suitable for Monte Carlo integration.

   hep-phComput.Phys.Commun.(2020)·92 citations
8. 08*

   $\pi \pi$ scattering from a similarity renormalization group perspective

   María Gómez-Rocha🇪🇸 · Enrique Ruiz Arriola🇪🇸

   A Wilsonian approach based on the Similarity Renormalization Group to $\pi \pi$ scattering is analyzed in the $JI=$00, 11 and 02 channels in momentum space up to a maximal CM energy of $\sqrt{s}=1.4$ GeV. We identify the Hamiltonian by means of the 3D reduction of the Bethe-Salpeter equation in the Kadyschevsky scheme. We propose a new method to integrate the SRG equations based in the Crank-Nicolson algorithm with a single step finite difference so that isospectrality is preserved at any step of the calculations. We discuss issues on the high momentum tails present in the fitted interactions hampering calculations.

   hep-phAIP Conf.Proc.(2020)·2 citations
9. 09*

   $P_c$ Photo-production And Decay

   Giancarlo Rossi🇮🇹 · Gabriele Veneziano🇨🇭

   The 2015 LHCb discovery of a structure (denoted by $P_c^{+}$) decaying in $J/\psi p$ and conjectured to be a penta-quark state, has triggered a renewed interest in the question of possible existence of multi-quark states not predicted by the naive quark model. In this talk we present some considerations on $P_c$ photo-production experiments, aimed at testing its multi-quark interpretation in the framework of a 40-years-old string-junction picture that allows a unified description of baryons, tetra-, and penta-quark states.

   hep-phhep-ex5 citations
10. 10*

    Improved BSM Sensitivity in Diboson Processes

    Brian Henning🇨🇭 · Davide Maria Lombardo🇨🇭 · Francesco Riva🇨🇭

    We study $W^{+}{W}^{-}$ and $Zh$ final states at future linear $e^{+}{e}^{-}$ colliders; designing analyses specific to the various final state polarizations allows us to target specific beyond the Standard Model (BSM) effects, parametrized in the form of dimension-6 operators. We find that CLIC can access effects roughly an order of magnitude smaller than HL-LHC or ILC, and two orders of magnitude smaller than LEP. These results are interpreted in the context of well-motivated BSM scenarios---at weak and strong coupling---where we expect correlated effects in Drell-Yann processes. The latter turn out to have better discovery potential, although the diboson processes provide additional discriminating power, potentially furnishing a way to measure the spin and coupling of BSM states.

    hep-phEPJC(2020)·6 citations
11. 11*

    Probing Lorentz Invariance With Top Pair Production at the LHC and Future Colliders

    A. Carle🇫🇷 · N. Chanon🇫🇷 · S. Perries🇫🇷

    This article presents prospects for Lorentz-violation searches with $t\bar{t}$ at the LHC and future colliders. After a short presentation of the Standard-Model Extension as a Lorentz-symmetry-breaking effective field theory, we will focus on $t\bar{t}$ production. We study the impact of Lorentz violation as a function of center-of-mass energy and evaluate the sensitivity of collider experiments to this signal.

    hep-ph3 citations
12. 12*

    Electroweak and QCD Corrections to $Z$ and $W$ pole observables in the SMEFT

    Sally Dawson🇺🇸 · Pier Paolo Giardino🇪🇸

    We compute the next-to-leading order QCD and electroweak corrections to $Z$ and $W$ pole observables using the dimension-6 Standard Model effective field theory and present numerical results that can easily be included in global fitting programs. Limits on SMEFT coefficient functions are presented at leading order and at next-to-leading order under several assumptions.

    hep-phPRD(2020)·91 citations
13. 13*

    Fibonacci Fast Convergence for Neutrino Oscillations in Matter

    Peter B. Denton🇺🇸 · Stephen J. Parke🇺🇸 · Xining Zhang🇺🇸

    Understanding neutrino oscillations in matter requires a non-trivial diagonalization of the Hamiltonian. As the exact solution is very complicated, many approximation schemes have been pursued. Here we show that one scheme, systematically applying rotations to change to a better basis, converges exponentially fast wherein the rate of convergence follows the Fibonacci sequence. We find that the convergence rate of this procedure depends very sensitively on the initial choices of the rotations as well as the mechanism of selecting the pivots. We then apply this scheme for neutrino oscillations in matter and discover that the optimal convergence rate is found using the following simple strategy: first apply the vacuum (2-3) rotation and then use the largest off-diagonal element as the pivot for each of the following rotations. The Fibonacci convergence rate presented here may be extendable to systems beyond neutrino oscillations.

    hep-phhep-thPLB(2020)·9 citations
14. 14*

    Regge Limit of Gauge Theory Amplitudes beyond Leading Power Approximation

    Alexander A. Penin🇨🇦

    We study the high-energy small-angle {\it Regge} limit of the fermion-antifermion scattering in gauge theories and consider the part of the amplitude suppressed by a power of the scattering angle. For abelian gauge group all-order resummation of the double-logarithmic radiative corrections to the leading power-suppressed term is performed. We find that when the logarithm of the scattering angle is comparable to the inverse gauge coupling constant the asymptotic double-logarithmic enhancement overcomes the power suppression, a formally subleading term becomes dominant, and the small-angle expansion breaks down. For the nonabelian gauge group we show that in the color-singlet channel for sufficiently small scattering angles the power-suppressed contribution becomes comparable to the one of BFKL pomeron. Possible role of the subleading-power effects for the solution of the unitarity problem of perturbative Regge analysis in QED and QCD is discussed. An intriguing relation between the asymptotic behavior of the power-suppressed amplitudes in Regge and Sudakov limits is discovered.

    hep-phhep-thJHEP(2020)·9 citations
15. 15*

    Electroweak phase transition with composite Higgs models: calculability, gravitational waves and collider searches

    Ligong Bian🇨🇳 · Yongcheng Wu🇨🇦 · Ke-Pan Xie🇰🇷

    We study the strong first order electroweak phase transition (SFOEWPT) with the $SO(6)/SO(5)$ composite Higgs model, whose scalar sector contains one Higgs doublet and one real singlet. Six benchmark models are built with fermion embeddings in $\text{1}$, $\text{6}$, and $\text{15}$ of $SO(6)$. We show that SFOEWPT cannot be triggered under the minimal Higgs potential hypothesis, which assumes the scalar potential is dominated by the form factors from the lightest composite resonances. To get a SFOEWPT, the contributions from local operators induced by physics above the cutoff scale are needed. We take the $\text{6}+\text{6}$ model as an example to investigate the gravitational waves prediction and the related collider phenomenology.

    hep-phastro-ph.COJHEP(2019)·79 citations
16. 16*

    Gravitational Waves as a Probe of Left-Right Symmetry Breaking

    Vedran Brdar🇩🇪 · Lukas Graf🇩🇪 · Alexander J. Helmboldt🇩🇪 · Xun-Jie Xu🇩🇪

    Left-right symmetry at high energy scales is a well-motivated extension of the Standard Model. In this paper we consider a typical minimal scenario in which it gets spontaneously broken by scalar triplets. Such a realization has been scrutinized over the past few decades chiefly in the context of collider studies. In this work we take a complementary approach and investigate whether the model can be probed via the search for a stochastic gravitational wave background induced by the phase transition in which $SU(3{)}_C\times SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{B-L}$ is broken down to the Standard Model gauge symmetry group. A prerequisite for gravitational wave production in this context is a first-order phase transition, the occurrence of which we find in a significant portion of the parameter space. Although the produced gravitational waves are typically too weak for a discovery at any current or future detector, upon investigating correlations between all relevant terms in the scalar potential, we have identified values of parameters leading to observable signals. This indicates that, given a certain moderate fine-tuning, the minimal left-right symmetric model with scalar triplets features another powerful probe which can lead to either novel constraints or remarkable discoveries in the near future. Let us note that some of our results, such as the full set of thermal masses, have to the best of our knowledge not been presented before and might be useful for future studies, in particular in the context of electroweak baryogenesis.

    hep-phastro-ph.COJCAP(2019)·66 citations
17. 17*

    Gauging the accidental symmetries of the Standard Model, and implications for the flavour anomalies

    Wolfgang Altmannshofer🇺🇸 · Joe Davighi🇬🇧 · Marco Nardecchia🇮🇹

    We explore the possibility that lepton family numbers and baryon number are such good symmetries of Nature because they are the global remnant of a spontaneously broken gauge symmetry. An almost arbitrary linear combination of these symmetries (together with a component of global hypercharge) can be consistently gauged, if the Standard Model (SM) fermion content is augmented by three chiral SM singlet states. Within this framework of $U(1)$ extensions of the SM one generically expects flavour non-universality to emerge in the charged leptons, in such a way that naturally prevents lepton flavour violation, by aligning the mass and weak eigenbases. For quarks, all the SM Yukawa couplings responsible for their observed masses and mixings arise at the renormalisable level. We perform fits to show that models in this class can explain $R_{K^{(\ast )}}$ and the other neutral current $B$ anomaly data if we introduce a heavy vector-like quark to mediate the required quark flavour violation, while simultaneously satisfying other constraints from direct $Z^{\prime }$ searches at the LHC, $B_s$ meson mixing, a number of electroweak precision observables, and neutrino trident production. Within this symmetry-motivated framework of models, we find interesting implications for the flavour anomalies; notably, any axial couplings of the $Z^{\prime }$ to electrons and muons must be flavour universal, with the flavour universality violation arising solely from the vector-like couplings. We also comment on the generation of neutrino masses in these models.

    hep-phPRD(2020)·67 citations
18. 18*

    An intricate quantum statistical effect and the foundation of quantum mechanics

    Fritz W. Bopp🇩🇪

    An intricate quantum statistical effect guides us to a deterministic, non-causal quantum universe with given fixed initial and final state density matrix. A concept is developed on how and where something like macroscopic physics can emerge. The concept does not allow to incorporate philosophically indispensable free will decisions. If the quantum world and its conjugate evolve independently one can replace both fixed final states by a matching common one. This allows for external manipulations done in the quantum world and its conjugate which do not otherwise alter the basic structure. In a big bang / big crunch universe the expanding part can be attributed to the quantum world and the contracting part to the conjugate one. The obtained bi-linear picture has a number of beautiful and exciting consequences.

    ↳ quant-phgr-qchep-phFound.Phys.(2021)·4 citations
19. 19*

    Quasar X-ray and UV flux, baryon acoustic oscillation, and Hubble parameter measurement constraints on cosmological model parameters

    Narayan Khadka🇺🇸 · Bharat Ratra🇺🇸

    We use the Risaliti & Lusso (2015) compilation of 808 X-ray and UV flux measurements of quasars (QSOs) in the redshift range $0.061\le z\le 6.28$, alone and in conjuction with baryon acoustic oscillation (BAO) and Hubble parameter [$H(z)$] measurements, to constrain cosmological parameters in six cosmological models. The QSO data constraints are significantly weaker than, but consistent with, those from the $H(z)$ + BAO data. A joint analysis of the QSO + $H(z)$ + BAO data is consistent with the current standard model, spatially-flat $\Lambda$CDM, but mildly favors closed spatial hypersurfaces and dynamical dark energy.

    ↳ astro-ph.COgr-qchep-exhep-phMNRAS(2020)·95 citations
20. 20*

    hi_class: Background Evolution, Initial Conditions and Approximation Schemes

    Emilio Bellini🇬🇧 · Ignacy Sawicki🇨🇿 · Miguel Zumalacárregui🇺🇸

    Cosmological datasets have great potential to elucidate the nature of dark energy and test gravity on the largest scales available to observation. Theoretical predictions can be computed with hi_class (www.hiclass-code.net), an accurate, fast and flexible code for linear cosmology, incorporating a wide range of dark energy theories and modifications to general relativity. We introduce three new functionalities into hi_class: (1) Support for models based on covariant Lagrangians, including a constraint-preserving integration scheme for the background evolution and a series of worked-out examples: Galileon, nKGB, quintessence (monomial, tracker) and Brans-Dicke. (2) Consistent initial conditions for the scalar-field perturbations in the deep radiation era, identifying the conditions under which modified-gravity isocurvature perturbations may grow faster than adiabatic modes leading to a loss of predictivity. (3) An automated quasistatic approximation scheme allowing order-of-magnitude improvement in computing performance without sacrificing accuracy for wide classes of models. These enhancements bring the treatment of dark energy and modified gravity models to the level of detail comparable to software tools restricted to standard $\Lambda$CDM cosmologies. The hi_class code is publicly available (https://github.com/miguelzuma/hi_class_public), ready to explore current data and prepare for next-generation experiments.

    ↳ astro-ph.COgr-qchep-phhep-thJCAP(2020)·85 citations
21. 21*

    Sterile Neutrinos, Black Hole Vacuum and Holographic Principle

    Gabriela Barenboim🇪🇸 · Christopher T. Hill🇺🇸

    We construct an effective field theory (EFT) model that describes matter field interactions with Schwarzschild mini-black-holes (SBH's), treated as a scalar field, $B_0(x)$. Fermion interactions with SBH's require a random complex spurion field, ${\theta }_{ij}$, which we interpret as the EFT description of "holographic information," which is correlated with the SBH as a composite system. We consider Hawking's virtual black hole vacuum (VBH) as a Higgs phase, $⟨B_0⟩=V$. Integrating sterile neutrino loops, the field ${\theta }_{ij}$ is promoted to a dynamical field, necessarily developing a tachyonic instability and acquiring a VEV of order the Planck scale. For $N$ sterile neutrinos this breaks the vacuum to $SU(N)\times U(1)/SO(N)$ with $N$ degenerate Majorana masses, and $(1/2)N(N+1)$ Nambu-Goldstone neutrino-Majorons. The model suggests many scalars fields, corresponding to all fermion bilinears, may exist bound nonperturbatively by gravity.

    ↳ hep-thgr-qchep-phEPJC(2021)·2 citations
22. 22*

    Isospin-breaking corrections to the muon magnetic anomaly in Lattice QCD

    Davide Giusti🇮🇹 · Vittorio Lubicz🇮🇹 · Guido Martinelli🇮🇹 · Francesco Sanfilippo🇮🇹 · Silvano Simula🇮🇹

    In this contribution we present a lattice calculation of the leading-order electromagnetic and strong isospin-breaking (IB) corrections to the quark-connected hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon. The results are obtained adopting the RM123 approach in the quenched-QED approximation and using the QCD gauge configurations generated by the ETM Collaboration with $N_f=2+1+1$ dynamical quarks, at three values of the lattice spacing ($a\simeq 0.062,0.082,0.089$ fm), at several lattice volumes and with pion masses between $\simeq 210$ and $\simeq 450$ MeV. After the extrapolations to the physical pion mass and to the continuum and infinite-volume limits the contributions of the light, strange and charm quarks are respectively equal to $\delta a_{\mu }^{\mathrm{HVP}}(ud)=7.1(2.5)\cdot 10^{-10}$, $\delta a_{\mu }^{\mathrm{HVP}}(s)=-0.0053(33)\cdot 10^{-10}$ and $\delta a_{\mu }^{\mathrm{HVP}}(c)=0.0182(36)\cdot 10^{-10}$. At leading order in ${\alpha }_{em}$ and $(m_d-m_u)/{\Lambda }_{QCD}$ we obtain $\delta a_{\mu }^{\mathrm{HVP}}(udsc)=7.1(2.9)\cdot 10^{-10}$, which is currently the most accurate determination of the IB corrections to $a_{\mu }^{\mathrm{HVP}}$.

    ↳ hep-lathep-exhep-phPoS(2019)·7 citations
23. 23*

    Mining for Dark Matter Substructure: Inferring subhalo population properties from strong lenses with machine learning

    Johann Brehmer🇺🇸 · Siddharth Mishra-Sharma🇺🇸 · Joeri Hermans🇧🇪 · Gilles Louppe🇧🇪 · Kyle Cranmer🇺🇸

    The subtle and unique imprint of dark matter substructure on extended arcs in strong lensing systems contains a wealth of information about the properties and distribution of dark matter on small scales and, consequently, about the underlying particle physics. However, teasing out this effect poses a significant challenge since the likelihood function for realistic simulations of population-level parameters is intractable. We apply recently-developed simulation-based inference techniques to the problem of substructure inference in galaxy-galaxy strong lenses. By leveraging additional information extracted from the simulator, neural networks are efficiently trained to estimate likelihood ratios associated with population-level parameters characterizing substructure. Through proof-of-principle application to simulated data, we show that these methods can provide an efficient and principled way to simultaneously analyze an ensemble of strong lenses, and can be used to mine the large sample of lensing images deliverable by near-future surveys for signatures of dark matter substructure.

    ↳ astro-ph.COastro-ph.HEastro-ph.IMhep-ph+1ApJ(2019)·94 citations
24. 24*

    Dynamical Regularities in Galaxies

    Stacy McGaugh🇺🇸 · Federico Lelli🇩🇪 · Pengfei Li🇺🇸 · Jim Schombert🇺🇸

    Galaxies are observed to obey a strict set of dynamical scaling relations. We review these relations for rotationally supported disk galaxies spanning many decades in mass, surface brightness, and gas content. The behavior of these widely varied systems can be summarized with a handful of empirical laws connected by a common acceleration scale.

    ↳ astro-ph.GAastro-ph.COgr-qchep-phIAU Symp.(2019)·10 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.