Wed·Dec 4, 2019Wednesday·December 4, 2019

1. 01*

   Dynamical Higgs Field Alignment in the NMSSM

   Nina M. Coyle🇺🇸 · Carlos E.M. Wagner🇺🇸

   Experimental probes of the recently discovered Higgs boson show that its behavior is close to that of the Standard Model (SM) Higgs particle. Extensions of the SM which include extra Higgs bosons are constrained by these observations, implying either the decoupling of the heavy non-standard Higgs particles or the realization of alignment, associated with vanishing mixing of the SM-like Higgs boson with the non-standard ones. Quite generally, alignment is not enforced by symmetry considerations and hence it is interesting to look for dynamical ways in which this condition can be realized. We show that this is possible in the Next-to-Minimal Supersymmetric Standard Model (NMSSM), in which alignment is achieved for values of the coupling of the Higgs fields to the singlet field that become large close to the Grand Unification (GUT) scale. This, in turn, can be explained by the composite nature of the Higgs fields, with a compositeness scale close to the GUT scale. In this article we present this dynamical scenario and discuss its phenomenological properties.

   hep-phPRD(2020)·6 citations
2. 02*

   High Scale Validity of the DFSZ Axion Model with Precision

   Satsuki Oda🇯🇵 · Yutaro Shoji🇯🇵 · Dai-suke Takahashi🇯🇵

   With the assumption of classical scale invariance at the Planck scale, the DFSZ axion model can generate the Higgs mass terms of the appropriate size through technically natural parameters and may be valid up to the Planck scale. We discuss the high scale validity of the Higgs sector, namely the absence of Landau poles and the vacuum stability. The Higgs sector is identical to that of the type-II two Higgs doublet model with a limited number of the Higgs quartic couplings. We utilize the state-of-the-art method to calculate vacuum decay rates and find that they are enhanced at most by 10^10 compared with the tree level evaluation. We also discuss the constraints from flavor observables, perturbative unitarity, oblique parameters and collider searches. We find that the high scale validity tightly constrains the parameter region, but there is still a chance to observe at most about 10% deviation of the $125\mathrm{GeV}$ Higgs couplings to the fermions.

   hep-phJHEP(2020)·11 citations
3. 03*

   Mixed gluinos and sgluons from a new SU(3) gauge group

   Stephen P. Martin🇺🇸

   I study supersymmetric models in which the QCD gauge group is the remnant diagonal subgroup from the spontaneous breaking of an $SU(3)\times SU(3)$ gauge group at a multi-TeV scale. In renormalizable models with soft supersymmetry breaking, the scalar potential is shown to have global minima with the required gauge symmetry breaking pattern. In addition to a massive color octet vector boson, this framework predicts 3 color octet spin-0 sgluons, and 4 color octet gluinos with both Dirac and Majorana mass terms. One of the gluino mass eigenstates typically has a coupling to quark-squark pairs that is at least as large as the prediction of minimal supersymmetry, but it need not be the lightest one.

   hep-phPRD(2020)·3 citations
4. 04*

   On the Modelling of Energetic Multi-jet QCD Events

   Daniel Turgeman🇮🇱 · Michael Pitt🇨🇭 · Itamar Roth🇮🇱 · Ehud Duchovni🇮🇱

   Physics beyond the Standard Model (BSM) may be unveiled by studying events with a high number of outgoing jets, produced at the LHC with energies above the TeV scale (energetic multi-jet events). Such events are dominated by QCD processes, where the calculations rely on some sort of approximation. Therefore, it is important to develop a robust approach for modeling such events that could probe the existence of BSM signals. In this note, jet spatial distributions in energetic multi-jet processes were compared using several state-of-the-art MC event generators. Slight differences were found, indicating modelling limitations. Therefore, a data-driven technique for the estimation of processes with a final state that contains a large number of jets is proposed. This procedure can predict jet multiplicities up to a precision of ~25\% in energetic multi-jet events.

   hep-phEPJC(2020)·2 citations
5. 05*

   Top quark mass measurement in radiative events at electron-positron colliders

   Marça Boronat🇪🇸 · Esteban Fullana🇪🇸 · Juan Fuster🇪🇸 · Pablo Gomis🇪🇸 · André Hoang🇦🇹 · Vicent Mateu🇪🇸 · Marcel Vos🇪🇸 · Angelika Widl🇪🇸

   In this letter, we evaluate potential of linear $e^{+}{e}^{-}$ colliders to measure the top quark mass in radiative events and in a suitable short-distance scheme. We present a calculation of the differential cross section for production of a top quark pair in association with an energetic photon from initial state radiation, as a function of the invariant mass of the $t\bar{t}$ system. This {\it matched} calculation includes the QCD enhancement of the cross section around the $t\bar{t}$ production threshold and remains valid in the continuum well above the threshold. The uncertainty in the top mass determination is evaluated in realistic operating scenarios for the Compact Linear Collider (CLIC) and the International Linear Collider (ILC), including the statistical uncertainty and the theoretical and experimental systematic uncertainties. With this method, the top quark mass can be determined with a precision of $110$ MeV in the initial stage of CLIC, with $1$ ab${}^{-1}$ at $\sqrt{s}=$ 380 GeV, and with a precision of approximately $150$ MeV at the ILC, with $L=4$ ab${}^{-1}$ at $\sqrt{s}=500$ GeV. Radiative events allow measurements of the top quark mass at different renormalization scales, and we demonstrate that such a measurement can yield a statistically significant test of the evolution of the MSR mass $m_t^{\mathrm{MSR}}(R)$ for scales $R<m_t$.

   hep-phhep-exPLB(2020)·24 citations
6. 06*

   Investigation of particle distributions in Xe-Xe collision at 5.44 TeV with Tsallis statistics

   Hai-Fu Zhao🇨🇳 · Bao-Chun Li🇨🇳 · Hong-Wei Dong🇨🇳

   The distribution characteristic of final-state particles is one of significant parts in high energy nuclear collisions. The transverse momentum distribution of charged particles carries essential evolution information about the collision system. Tsallis statistics is used to investigate the transverse momentum distribution of charged particles produced in Xe-Xe collisions at 5.44 TeV. On the basis, we reproduce the nuclear modification factor of the charged particles. The calculated results agree approximately with the experimental data measured by the ALICE Collaboration.

   hep-phnucl-thAdv.High Energy Phys.(2020)·2 citations
7. 07*

   Coulomb and strong interactions in the final state of HBT correlations for Lévy type source functions

   D. Kincses🇭🇺 · M. I. Nagy🇭🇺 · M. Csanád🇭🇺

   We present detailed calculations about the expected shape of two-pion Bose-Einstein (or HBT) correlations in high energy heavy ion collisions that include a realistic treatment of final state Coulomb interaction as well as strong interactions (dominated by s-wave scattering). We assume Lévy type source functions, a generalization that goes beyond the Gaussian approximation. Various recent experimental results found the use of such source types necessary to properly describe the shape of the measured correlation functions. We find that strong final state interactions may play an important role in the shape of the two-pion correlation functions, especially if one considers source parameters beyond the Gaussian HBT radii. Precise experimental determination of these source parameters (such as Lévy stability exponent, correlation strength, etc.) seems to require the inclusion of the treatment of strong interaction not just for heavier particles (e.g. protons, lambdas) but also in case of two-pion measurements.

   hep-phPRC(2020)·33 citations
8. 08*

   Exploring Supersymmetric CP Violation after LHC Run 2 with Electric Dipole Moments and B Observables

   A. Arbey🇫🇷 · J. Ellis🇬🇧 · F. Mahmoudi🇫🇷

   We consider the prospects for measuring distinctive signatures of the CP-violating phases in the minimal supersymmetric extension of the Standard Model (MSSM) in light of the limits on sparticle masses from searches at the LHC. We use the CPsuperH code to evaluate model predictions and scan the parameter space using a geometric approach that maximizes CP-violating observables subject to the current upper limits on electric dipole moments (EDMs). We focus on the possible CP-violating asymmetry $A_{\mathrm{CP}}$ in $b\to s\gamma$ decay and on a possible CP-violating contribution to the $B_s-{\overline{B}}_s$ mass difference $\Delta M_{B_s}^{NP}$, as well as future measurements of the EDMs of the proton, neutron and electron. We find that the current LHC and EDM limits are consistent with values of $A_{\mathrm{CP}}$, $\Delta M_{B_s}^{NP}$ and the proton EDM that are measurable with the Belle-II detector, LHCb and a proposed measurement of the proton EDM using a storage ring, respectively. Measurement of a non-zero proton EDM would constrain $A_{\mathrm{CP}}$ significantly, but it and a CP-violating contribution to $\Delta M_{B_s}^{NP}$ could still be measurable, along with neutron and electron EDMs. A more accurate measurement of $A_{\mathrm{CP}}$ with the current central value would favour stop and chargino masses within reach of future LHC runs as well as a potentially measurable value of $\Delta M_{B_s}^{NP}$.

   hep-phhep-exEPJC(2020)·4 citations
9. 09*

   Neutrinos, vacuum stability and triple Higgs coupling in SMASH

   Timo J. Kärkkäinen🇭🇺 · Katri Huitu🇫🇮 · C.R. Das🇷🇺

   We perform a phenomenological analysis of the observable consequences on the extended scalar sector of the SMASH (Standard Model - Axion - Seesaw - Higgs portal inflation) framework. We solve the vacuum metastability problem in a suitable region of SMASH scalar parameter spaces and discuss the one-loop correction to triple Higgs coupling ${\lambda }_{HHH}$. We also find that the correct neutrino masses and mass squared differences and baryonic asymmetry of the universe can arise from this model and consider running of the Yukawa couplings of the model. In fact, we perform a full two-loop renormalization group analysis of the SMASH model.

   hep-ph1 citation
10. 10*

    A new analysis of the MiniBooNE low-energy excess

    C. Giunti🇮🇹 · A. Ioannisian🇦🇲 · G. Ranucci🇮🇹

    We present the results of a new analysis of the data of the MiniBooNE experiment taking into account the additional background of photons from ${\Delta }^{+/0}$ decay proposed in arXiv:1909.08571 and additional contributions due to coherent photon emission, incoherent production of higher mass resonances, and incoherent non-resonant nucleon production. We show that the new background can explain part of the MiniBooNE low-energy excess and the statistical significance of the MiniBooNE indication in favor of short-baseline neutrino oscillation decreases from $5.1\sigma$ to $3.6\sigma$. We also consider the implications for short-baseline neutrino oscillations in the 3+1 active-sterile neutrino mixing framework. We show that the new analysis of the MiniBooNE data indicates smaller active-sterile neutrino mixing and may lead us towards a solution of the appearance-disappearance tension in the global fit of short-baseline neutrino oscillation data.

    hep-phhep-exJHEP(2020)·21 citations
11. 11*

    Threshold factorization of the Drell-Yan process at next-to-leading power

    Martin Beneke🇩🇪 · Alessandro Broggio🇮🇹 · Sebastian Jaskiewicz🇩🇪 · Leonardo Vernazza🇮🇹

    We present a factorization theorem valid near the kinematic threshold $z=Q^2/\hat{s}\to 1$ of the partonic Drell-Yan process $q\bar{q}\to {\gamma }^{\ast }+X$ for general subleading powers in the $(1-z)$ expansion. We then consider the specific case of next-to-leading power. We discuss the emergence of collinear functions, which are a key ingredient to factorization starting at next-to-leading power. We calculate the relevant collinear functions at $\mathcal{O}({\alpha }_s)$ by employing an operator matching equation and we compare our results to the expansion-by-regions computation up to the next-to-next-to-leading order, finding agreement. Factorization holds only before the dimensional regulator is removed, due to a divergent convolution when the collinear and soft functions are first expanded around $d=4$ before the convolution is performed. This demonstrates an issue for threshold resummation beyond the leading-logarithmic accuracy at next-to-leading power.

    hep-phJHEP(2020)·117 citations
12. 12*

    Axial vector transition form factors in holographic QCD and their contribution to the anomalous magnetic moment of the muon

    Josef Leutgeb🇦🇹 · Anton Rebhan🇦🇹

    We evaluate axial vector transition form factors in holographic QCD models that have been shown to reproduce well recent experimental and theoretical results for the pion transition form factor. Comparing with L3 data on $f_1\to \gamma {\gamma }^{\ast }$ we find remarkable agreement regarding the shape of single-virtual form factors. In the double-virtual case, the holographic results differ strongly from a simple dipole form, and this has an important impact on the corresponding estimate of the axial vector contribution to the anomalous magnetic moment of the muon $a_{\mu }$ through hadronic light-by-light scattering. We demonstrate that hard-wall models satisfy the Melnikov-Vainshtein short-distance constraint for the latter, if and only if the infinite tower of axial vector states is included. The results for $a_{\mu }$, however, are strongly dominated by the first few resonances. Numerically, these results turn out to be surprisingly large: (2.9 - 4.1)$\times 10^{-10}$ in the hard-wall models, 57-58% of which are due to the longitudinal contribution, which is the one responsible for the Melnikov-Vainshtein short-distance constraint. Rescaling the holographic result to obtain an optimal fit of L3 data, but then matching only 52% of the asymptotic constraint, the result is reduced to $2.2(5)\times 10^{-10}$, which is still significantly larger than most previous phenomenological estimates of the axial vector exchange contribution.

    hep-phhep-thPRD(2020)·114 citations
13. 13*

    High-precision limits on $W$-$W^{\prime }$ and $Z$-$Z^{\prime }$ mixing from diboson production using the full LHC Run 2 ATLAS data set

    A.A. Pankov🇧🇾 · P. Osland🇳🇴 · I.A. Serenkova🇧🇾 · V.A. Bednyakov🇷🇺

    The full ATLAS Run 2 data set with time-integrated luminosity of 139 fb${}^{-1}$ in the diboson channels in hadronic final states is used to probe a simple model with an extended gauge sector (EGM), proposed by Altarelli et al., and often taken as a convenient benchmark by experimentalists. This model accommodates new charged $W^{\prime }$ and neutral $Z^{\prime }$ vector bosons with modified trilinear Standard Model gauge couplings, decaying into electroweak gauge boson pairs $WZ$ or $WW$, where $W$/$Z$ decay hadronically. Exclusion limits at the 95% C.L. on the $Z^{\prime }$ and $W^{\prime }$ resonance production cross section times branching ratio to electroweak gauge boson pairs in the mass range of $\sim$ 1 - 5 TeV are here converted to constraints on $W$-$W^{\prime }$ and $Z$-$Z^{\prime }$ mixing parameters and masses for the EGM. We present exclusion regions on the parameter space of the $W^{\prime }$ and $Z^{\prime }$ by using the full Run 2 data set comprised of $pp$ collisions at $\sqrt{s}=13$ TeV and recorded by the ATLAS detector at the CERN LHC. The obtained exclusion regions are significantly extended compared to those obtained from the previous analysis performed with Tevatron data as well as with LHC data collected at 7 and 8 TeV in Run 1 and are the most stringent bounds to date.

    hep-phhep-exEPJC(2020)·12 citations
14. 14*

    Modified instanton sum in QCD and higher-groups

    Yuya Tanizaki🇺🇸 · Mithat Ünsal🇺🇸

    We consider the $SU(N)$ Yang-Mills theory, whose topological sectors are restricted to the instanton number with integer multiples of $p$. We can formulate such a quantum field theory maintaining locality and unitarity, and the model contains both $2\pi$-periodic scalar and $3$-form gauge fields. This can be interpreted as coupling a topological theory to Yang-Mills theory, so the local dynamics becomes identical with that of pure Yang-Mills theory. The theory has not only ${\mathbb{Z}}_N$ $1$-form symmetry but also ${\mathbb{Z}}_p$ $3$-form symmetry, and we study the global nature of this theory from the recent 't Hooft anomaly matching. The computation of 't Hooft anomaly incorporates an intriguing higher-group structure. We also carefully examine that how such kinematical constraint is realized in the dynamics by using the large-$N$ and also the reliable semiclassics on ${\mathbb{R}}^3\times S^1$, and we find that the topological susceptibility plays a role of the order parameter for the ${\mathbb{Z}}_p$ $3$-form symmetry. Introducing a fermion in the fundamental or adjoint representation, we find that the chiral symmetry becomes larger than the usual case by ${\mathbb{Z}}_p$, and it leads to the extra $p$ vacua by discrete chiral symmetry breaking. No dynamical domain wall can interpolate those extra vacua since such objects must be charged under the $3$-form symmetry in order to match the 't Hooft anomaly.

    ↳ hep-thcond-mat.str-elhep-lathep-phJHEP(2020)·118 citations
15. 15*

    On the slope of curvature power spectrum in non-attractor inflation

    Ogan Özsoy (1 and 2)🇬🇧 · Gianmassimo Tasinato (1) ((1) Swansea University, (2) Warsaw University)🇬🇧

    The possibility that primordial black holes constitute a fraction of dark matter motivates a detailed study of possible mechanisms for their production. Black holes can form by the collapse of primordial curvature fluctuations, if the amplitude of their small scale spectrum gets amplified by several orders of magnitude with respect to CMB scales. Such enhancement can for example occur in single-field inflation that exhibit a transient non-attractor phase: in this work, we make a detailed investigation of the shape of the curvature spectrum in this scenario. We make use of an analytical approach based on a gradient expansion of curvature perturbations, which allows us to follow the changes in slope of the spectrum during its way from large to small scales. After encountering a dip in its amplitude, the spectrum can acquire steep slopes with a spectral index up to $n_s-1=8$, to then relax to a more gentle growth with $n_s-1\lesssim 3$ towards its peak, in agreement with the results found in previous literature. For scales following the peak associated with the presence of the non-attractor phase, the spectrum amplitude then mildly decays, during a transitional stage from non-attractor back to attractor evolution. Our analysis indicates that this gradient approach offers a transparent understanding of the contributions controlling the slope of the curvature spectrum. As an application of our findings, we characterise the slope in frequency of a stochastic gravitational wave background generated at second order from curvature fluctuations, using the more accurate information we gained on the shape of curvature power spectrum.

    ↳ astro-ph.COgr-qchep-phhep-thJCAP(2020)·109 citations
16. 16*

    Big-Bang Nucleosynthesis After Planck

    Brian D. Fields🇺🇸 · Keith A. Olive🇺🇸 · Tsung-Han Yeh🇺🇸 · Charles Young🇺🇸

    We assess the status of big-bang nucleosynthesis (BBN) in light of the final Planck data release and other recent developments, and in anticipation of future measurements. Planck data fix the cosmic baryon density to 0.9% precision, and determine the helium abundance and effective number of neutrinos with precision approaching that of astronomical and BBN determinations respectively. In addition, new high-redshift measurements give D/H to better precision than theoretical predictions, and new Li/H data reconfirm the lithium problem. We present new ${}^7\mathrm{Be}(n,p){}^7\mathrm{Li}$ rates using new neutron capture measurements; we have also examined the effect of proposed changes in the $d(p,\gamma ){}^3\mathrm{He}$ rates. Using these results we perform a series of likelihood analyses. We assess BBN/CMB consistency, with attention to how our results depend on the choice of Planck data, as well as how the results depend on the choice of non-BBN, non-Planck data sets. Most importantly the lithium problem remains, and indeed is more acute given the very tight D/H observational constraints; new neutron capture data reveals systematics that somewhat increases uncertainty and thus slightly reduces but does not essentially change the problem. We confirm that $d(p,\gamma ){}^3\mathrm{He}$ theoretical rates brings D/H out of agreement and slightly increases 7Li; new experimental data are needed at BBN energies. Setting the lithium problem aside, we find the effective number of neutrino species at BBN is $N_{\nu }=2.86\pm 0.15$. Future CMB Stage-4 measurements promise substantial improvements in BBN parameters: helium abundance determinations will be competitive with the best astronomical determinations, and $N_{\mathrm{eff}}$ will approach sensitivities capable of detecting the effects of Standard Model neutrino heating of the primordial plasma. (Abridged)

    ↳ astro-ph.COhep-phnucl-exJCAP(2020)·500 citations
17. 17*

    Electron-positron pair production in combined Sauter potential wells

    Binbing Wu🇨🇳 · Li Wang🇨🇳 · B. S. Xie🇨🇳

    Electron-positron pair production, in combined Sauter potential wells and an oscillating one is imposed on a static Sauter potential, is investigated by using the computational quantum field theory. We find that the gain number (the difference of pair number under combined potentials to the simple addition of pair number for each potential) of the created pairs depends strongly on the depth of static potential and the frequency of oscillating potential. In particular, it is more sensitive to the frequency compared with the depth. For the low-frequency multiphoton regime, the gaining is almost positive and exhibits interesting nonlinear characteristics on both depth and frequency. For the single-photon regime, however, the gaining is almost negative and decreases near linearly with depth while it exhibits an oscillation characteristic with frequency. Furthermore, the optimal frequency and depth of gain number are found and discussed.

    ↳ quant-phhep-ph1 citation
18. 18*

    Multi-messenger hunts for heavy WIMPs

    Geoff Beck🇿🇦

    Heavy neutrinos have a long history of consideration in the literature, in particular related to their role as solutions to the problems of neutrino mass, baryon asymmetry, and possibly dark matter. Interestingly, recent developments in the Madala hypothesis, a standard model extension designed to explain persistent LHC lepton anomalies, may also necessitate a heavy neutrino. This prospect is exciting as a dark matter model consisting of a TeV-scale leptophilic fermionic particle is also invoked to explain the electron-positron excess observed by the DAMPE experiment. The tantalising similarities between these new fermions may allow indirect dark matter detection methods to probe empirically compelling standard model extensions, like the Madala hypothesis. However, the leptophilic nature and large mass mean the expected gamma-ray signatures of annihilation or decay are weaker than those in the traditionally considered heavy quark and tau lepton channels. In this work we explore whether the KM3NeT neutrino detector could take advantage of the leptophilic nature of the added particle to provide an alternative means of exploring such interesting connections between cosmology and collider physics. We demonstrate that dwarf galaxies, in particular highly dense ultra-faint dwarf galaxies like Triangulum II, provide very strong prospects for KM3NeT searches.

    ↳ astro-ph.HEastro-ph.COhep-ph0 citations
19. 19*

    Fast apparent oscillations of fundamental constants

    Dionysios Antypas🇩🇪 · Dmitry Budker🇩🇪 · Victor V. Flambaum🇦🇺 · Mikhail G. Kozlov🇷🇺 · Gilad Perez🇮🇱 · Jun Ye🇺🇸

    Precision spectroscopy of atoms and molecules allows one to search for and to put stringent limits on the variation of fundamental constants. These experiments are typically interpreted in terms of variations of the fine structure constant $\alpha$ and the electron to proton mass ratio $\mu =m_e/m_p$. Atomic spectroscopy is usually less sensitive to other fundamental constants, unless the hyperfine structure of atomic levels is studied. However, the number of possible dimensionless constants increases when we allow for fast variations of the constants, where "fast" is determined by the time scale of the response of the studied species or experimental apparatus used. In this case, the relevant dimensionless quantity is, for example, the ratio $m_e/⟨m_e⟩$ and $⟨m_e⟩$ is the time average. In this sense, one may say that the experimental signal depends on the variation of dimensionful constants ($m_e$ in this example).

    ↳ physics.atom-phhep-phAnnalen Phys.(2020)·17 citations
20. 20*

    Light-Meson Spectroscopy at Lepto- and Hadroproduction Experiments

    Boris Grube🇩🇪

    The excitation spectrum of light mesons, which are composed of up, down, and strange quarks, is studied since decades. However, it still holds a number of puzzles and surprises that provide new insights into the nature of the strong interaction. Recent high-quality data samples from several experiments allow us to not only study the properties of established mesons with unprecedented precision but to also search for new states. These searches aim in particular at resolving the question of the existence of so-called exotic states, such as four-quark states or states with excited gluon fields. Since light mesons have often large widths and are overlapping, the mapping of their spectrum is challenging and requires large quantities of data on different production and decay modes. The data are analyzed using a framework of interfering quantum mechanical amplitudes known as partial-wave analysis (PWA). Most excited meson states decay into multi-particle final states, for which the PWA requires extensive modeling of the dynamics of the final-state hadrons. I will give an overview on ongoing experimental studies of light mesons and discuss possible interpretations. I will also touch on novel analysis techniques and the prospects for future progress.

    ↳ hep-exhep-ph0 citations
21. 21*

    Galileon scalar electrodynamics

    Ashu Kushwaha🇮🇳 · S. Shankaranarayanan (IIT Bombay)🇮🇳

    We construct a consistent model of Galileon scalar electrodynamics. The model satisfies three essential requirements: (1) The action contains higher-order derivative terms, and obey the Galilean symmetry, (2) Equations of motion also satisfy Galilean symmetry and contain only up to second-order derivative terms in the matter fields and, hence do not suffer from instability, and (3) local U(1) gauge invariance is preserved. We show that the non-minimal coupling terms in our model are different from that of the real scalar Galileon models; however, they match with the Galileon real scalar field action. We show that the model can lead to an accelerated expansion in the early Universe. We discuss the implications of the model for cosmological inflation.

    ↳ hep-thastro-ph.COgr-qchep-phPRD(2020)·7 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.