Thu·Mar 10, 2022Thursday·March 10, 2022

1. 01*

   Fate of the false vacuum in string-inspired nonlocal field theory

   Anish Ghoshal🇵🇱 · Florian Nortier🇫🇷

   In this article, we study Coleman bounce in weakly nonlocal theories which are motivated from string field theory. The kinetic term is extended via an infinite series of high-order derivatives, which comes into play at an energy scale $M$, without introducing any new states or ghosts in the mass spectrum. We calculate the bubble nucleation in thin-wall approximation, treating the system in semi-classical manner. We find that the effect of nonlocal scale $M$ in the theory is to suppress the vacuum tunneling rate from false to true vacuum compared to the standard local bouncing scenario. Likewise, we show that as we move further away from the bubble wall, the effects of nonlocality gets reduced and this suppression is significant only around the wall of the nucleated bubble. From our investigations, we conclude that the main effect is due to the fact that the nonlocality smears the solution of the local bubble profile. However, the energy of the bubble wall remains unaffected by the microscopic nonlocal behavior of the theory in the thin-wall approximation. We also discuss the cases for Lee-Wick theories and applications of our result to cosmology.

   hep-phastro-ph.COgr-qchep-thJCAP(2022)·10 citations
2. 02*

   Toward discovering the excited $\Omega$ baryons through nonleptonic weak decays of ${\Omega }_c$

   Kai-Lei Wang🇨🇳 · Qi-Fang Lü🇨🇳 · Ju-Jun Xie🇨🇳 · Xian-Hui Zhong🇨🇳

   The nonleptonic weak decay processes ${\Omega }_c\to \Omega {\pi }^{+}/\Omega (1P){\pi }^{+}/\Omega (1D){\pi }^{+}/\Omega (2S){\pi }^{+}$ are studied using the constituent quark model. The branching fraction of ${\Omega }_c\to \Omega {\pi }^{+}$ is predicted to be $1.0\%$. Considering the newly observed $\Omega (2012)$ resonance as a conventional $1P$-wave $\Omega$ excite state with spin-parity $J^P=3/2^{-}$, the newly measured ratio $\mathcal{B}[{\Omega }_c\to \Omega (2012){\pi }^{+}\to (\Xi \bar{K}{)}^{-}{\pi }^{+}]/\mathcal{B}[{\Omega }_c\to \Omega {\pi }^{+}]$ at Belle can be well understood. Besides, the production rates for the missing $1P-$wave state $\Omega (1^2{P}_{1/2^{-}})$, two spin quartet $1D-$wave states $\Omega (1^4{D}_{1/2^{+}})$ and $\Omega (1^4{D}_{3/2^{+}})$, and two $2S$-wave states $\Omega (2^2{S}_{1/2^{+}})$ and $\Omega (2^4{S}_{3/2^{+}})$ are also investigated. It is expected that these missing excited $\Omega$ baryons should have large potentials to be discovered through the nonleptonic weak decays of ${\Omega }_c$ in forthcoming experiments by Belle II and/or LHCb.

   hep-phhep-exPRD(2023)·35 citations
3. 03*

   Two- and three-body hadronic decays of charmed mesons involving a tensor meson

   Hai-Yang Cheng🇹🇼 · Cheng-Wei Chiang🇹🇼 · Zhi-Qing Zhang🇨🇳

   We study the quasi-two-body $D\to TP$ decays and the three-body $D$ decays proceeding through intermediate tensor resonances, where $T$ and $P$ denote tensor and pseudoscalar mesons, respectively. We employ $D\to T$ transition form factors based upon light-cone sum rules and the covariant light-front quark model to evaluate the decay rates, with the former giving a better agreement with current data. Though the tree amplitudes with the emitted meson being a tensor meson vanish under factorization approximation, contributions proportional to the tensor decay constant $f_T$ can be produced from vertex and hard spectator-scattering corrections. We also investigate the finite-width effects of the tensor mesons and find that, contrary to three-body $B$ decays, the tensor-mediated $D$ decays are more seriously affected and the narrow width approximation has to be corrected. More experimental data are required in order to extract information topological amplitudes associated with quasi-two-body $D\to TP$ decays. Among the data, the $D^{+}\to f_2{\pi }^{+}$ and $D^{+}\to {\bar{K}}_2^{\ast 0}{\pi }^{+}$ branching fractions are not self consistent and further clarification is called for.

   hep-phhep-exPRD(2022)·8 citations
4. 04*

   Effective-range expansion of the $T_{cc}^{+}$ state at the complex $D^{\ast +}{D}^0$ threshold

   Mikhail Mikhasenko🇩🇪

   Evaluation of the effective-range parameters for the $T_{cc}^{+}$ state in the LHCb model is examined. The finite width of $D^{\ast }$ leads to a shift of the expansion point into the complex plane to match analytical properties of the expanded amplitude. We perform an analytic continuation of the three-body scattering amplitude to the complex plane in a vicinity of the branch point and develop a robust procedure for computation of the expansion coefficients. The results yield a nearly-real scattering length, and two contributions to the the effective range which have not been accounted before.

   hep-ph21 citations
5. 05*

   Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables

   Debajyoti Choudhury🇮🇳 · Kuldeep Deka🇮🇳 · Suvam Maharana🇮🇳 · Lalit Kumar Saini🇮🇳

   We reassess non-standard triple gauge couplings in the light of the recent $(g-2{)}_{\mu }$ measurement at FNAL, the new lattice theory result of $(g-2{)}_{\mu }$ and the updated measurements of several $B$-decay modes. In the framework of SMEFT, three bosonic dimension-6 operators are invoked to parametrize physics beyond the Standard Model and their contributions to such low-energy observables computed. Constraints on the corresponding Wilson coefficients are then derived from fits to the current experimental bounds on the observables and compared with the most stringent ones available from the 13 TeV LHC data in the $W^{+}{W}^{-}$ and $W^{\pm }Z$ production channels.

   hep-phhep-exPRD(2022)·7 citations
6. 06*

   A fermionic portal to a non-abelian dark sector

   A. Belyaev · A. Deandrea · S. Moretti · L. Panizzi · N. Thongyoi

   We introduce a new class of renormalisable models, consisting of a dark $SU(2{)}_D$ gauge sector connected to the Standard Model (SM) through a Vector-Like (VL) fermion mediator, not requiring a Higgs portal, in which a massive vector boson is the Dark Matter (DM) candidate. These models are labelled Fermion Portal Vector Dark Matter (FPVDM). Multiple realisations are possible, depending on the properties of the VL partner and of the scalar potential. One example is discussed in detail. FPVDM models have a large number of applications in collider and non-collider experiments, depending on the mediator sector.

   hep-phFront.in Phys.(2024)·9 citations
7. 07*

   Special Issue on Advances in Chiral Quark Models

   Jorge Segovia🇪🇸

   The number of exotic candidates in both light- and heavy-quark hadron sectors has increased dramatically since the discovery by the Belle Collaboration of the so-called $X(3872)$ in 2003. It is clear that the simple quark model picture needs an extension and thus the last twenty years have witnessed an explosion of related theoretical and experimental activity. The ultimate goal of theory is to describe the properties of exotic states from the first principles of Quantum Chromodynamics (QCD), which is the non-Abelian Quantum Field Theory that describes the strong interaction. However, since this task is quite challenging, a more modest goal to start with is the development of QCD-motivated phenomenological models that specify the colored constituents, how they are clustered, and the forces between them. This Special Issue invited contributions reporting recent advances of phenomenological quark models in the study of hadron's spectrocopy, structure, and interactions, paying special attention to the exotic candidates but without losing sight of the conventional states. In response to the call for papers, and after a comprehensive peer review process, 8 articles qualified for acceptance in the final edition of the Special Issue. The authors are from geographically distributed countries such as Spain, South Africa, Ghana, China, Brazil, Argentina. This reflects the impact of the proposed topic and the effective organization of the guest editorial team of this Special Issue.

   hep-phhep-exhep-latnucl-ex+1Symmetry(2021)·0 citations
8. 08*

   Global fits of SUSY at future Higgs factories

   Peter Athron🇨🇳 · Csaba Balazs🇦🇺 · Andrew Fowlie🇨🇳 · Huifang Lv🇨🇳 · Wei Su🇰🇷 · Lei Wu🇨🇳 · Jin Min Yang🇨🇳 · Yang Zhang🇨🇳

   In this work, we study the impact of electroweak and Higgs precision measurements at future electron-positron colliders on several typical supersymmetric models, including the Constrained Minimal Supersymmetric Standard Model (CMSSM), Non-Universal Higgs Mass generalisations (NUHM1, NUHM2), and the 7-dimensional Minimal Supersymmetric Standard Model (MSSM7). Using publicly-available data from the \textsf{GAMBIT} community, we post-process previous SUSY global fits with additional likelihoods to explore the discovery potential of Higgs factories, such as the Circular Electron Positron Collider (CEPC), the Future Circular Collider (FCC) and the International Linear Collider (ILC). We show that the currently allowed parameter space of these models will be further tested by future precision measurements. In particular, dark matter annihilation mechanisms may be distinguished by precise measurements of Higgs observables.

   hep-phPRD(2022)·11 citations
9. 09*

   Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations

   M. Albaladejo🇪🇸 · J.Nieves🇪🇸

   We discuss a model-independent estimator of the likelihood of the compositeness of a shallow S-wave bound or virtual state. The approach is based on an extension of Weinberg's relations in Phys. Rev. 137, B672 (1965) and it relies only on the proximity of the energy of the state to the two-hadron threshold to which it significantly couples. The scheme only makes use of the experimental scattering length and the effective range low energy parameters, and it is shown to be fully consistent for predominantly molecular hadrons. As explicit applications, we analyse the case of the deuteron, the ${}^1{\mathrm{S}}_0$ nucleon-nucleon virtual state and the exotic $D_{s0}^{\ast }(2317{)}^{\pm }$, and find strong support to the molecular interpretation in all cases. Results are less conclusive for the $D_{s0}^{\ast }(2317{)}^{\pm }$, since the binding energy of this state is significantly higher than that of the deuteron, and the approach employed here is at the limit of its applicability. We also qualitatively address the case of the recently discovered $T_{cc}^{+}$ state, within the isospin limit to avoid the complexity of the very close thresholds $D^0{D}^{\ast +}$ and $D^{+}{D}^{\ast 0}$, which could mask the ingredients of the approach proposed in this work.

   hep-phnucl-thEPJC(2022)·55 citations
10. 10*

    A possible interpretation of $\Lambda$ baryon spectrum with pentaquark components

    Kai Xu🇹🇭 · Attaphon Kaewsnod🇹🇭 · Zheng Zhao🇹🇭 · Thiri Yadanar Htun🇹🇭 · Ayut Limphirat🇹🇭 · Yupeng Yan🇹🇭

    The $\Lambda$ baryon spectrum is studied within the SU(3) flavor symmetry in a constituent quark model. We found that it is rather difficult to accommodate some negative-parity $\Lambda$ resonances as single $q^{2}s$ ($q=u,d$ quarks) states in the conventional three-quark picture. The ground $q^{3}s\bar{q}$ pentaquark mass spectrum is evaluated and a possible interpretation is proposed in the work: the observed $\Lambda (1405)1/2^{-}$, $\Lambda (1670)1/2^{-}$ and $\Lambda (1800)1/2^{-}$ are three-state mixtures of two $p$-wave $q^{2}s$ states and one ground $q^{3}s\bar{q}$ pentaquark state, so are the $\Lambda (1520)3/2^{-}$, $\Lambda (1690)3/2^{-}$ and $\Lambda (2050)3/2^{-}$ resonances.

    hep-phJ.Phys.G(2023)·4 citations
11. 11*

    Modeling hadronization using machine learning

    Phil Ilten🇺🇸 · Tony Menzo🇺🇸 · Ahmed Youssef🇺🇸 · Jure Zupan🇺🇸

    We present the first steps in the development of a new class of hadronization models utilizing machine learning techniques. We successfully implement, validate, and train a conditional sliced-Wasserstein autoencoder to replicate the Pythia generated kinematic distributions of first-hadron emissions, when the Lund string model of hadronization implemented in Pythia is restricted to the emissions of pions only. The trained models are then used to generate the full hadronization chains, with an IR cutoff energy imposed externally. The hadron multiplicities and cumulative kinematic distributions are shown to match the Pythia generated ones. We also discuss possible future generalizations of our results.

    hep-phSciPost Phys.(2023)·53 citations
12. 12*

    The Scale of New Physics from the Higgs Couplings to gg

    Fayez Abu-Ajamieh🇮🇳

    Measuring the Higgs couplings accurately at colliders is one of the best routes for finding physics Beyond the Standard Model (BSM). If the measured couplings deviate from the SM predictions, then this would give rise to energy-growing processes that violate tree-level unitarity at some energy scale, indicating new physics. In this paper, we extend previous work on unitarity bounds from the Higgs potential and the Higgs couplings to vector bosons, the top quark, $\gamma \gamma$ and $\gamma Z$; to the Higgs coupling to gg. We show that the scale of new physics could be as low as $\sim 10$ TeV, which although beyond the reach of the LHC, is well within the reach of the future 100-TeV collider, and can also be probed indirectly in the High Luminosity LHC (HL-LHC).

    hep-phPLB(2022)·12 citations
13. 13*

    Computer modeling of $t\bar{t}h(H)$ Higgs boson production with MSSM model

    Tetiana Obikhod🇺🇦 · Ievgenii Petrenko🇺🇦

    We studied the properties of the MSSM Higgs bosons, h and H through the decay into b-quarks in associated production with a top-quark pair. There was used the tree-level Higgs sector described by two parameters M${}_A$ and tan$\beta$ and found their optimal values according to experimental data of ATLAS detector. Using the restricted parameter space we calculated cross sections of associated $t\bar{t}h(H)$ production at 13 and 14 TeV, the corresponding kinematical cuts, mass distributions and Branching Ratios of h and H decays into $b\bar{b}$ quark pair.

    hep-phProb.Atomic Sci.Technol.(2022)·0 citations
14. 14*

    Three-point energy correlator in $\mathcal{N}=4$ super Yang-Mills Theory

    Kai Yan🇨🇳 · Xiaoyuan Zhang🇺🇸

    An analytic formula is given for the three-point energy correlator (EEEC) at leading order (LO) in maximally supersymmetric Yang-Mills theory ($\mathcal{N}=4$ sYM). This is the first analytic calculation of a three-parameter event shape observable, which provides valuable data for various studies ranging from conformal field theories to jet substructure. The associated class of functions define a new type of single-valued polylogarithms characterized by 16 alphabet letters, which manifest a $D_6\times Z_2$ dihedral symmetry of the event shape. With the unexplored simplicity in the perturbative structure of EEEC, all kinematic regions including collinear, squeezed and coplanar limits are now available.

    ↳ hep-thhep-phPRL(2022)·50 citations
15. 15*

    Remarks about weighted energy integrals over Minkowski spectral functions from Euclidean lattice data

    Thomas DeGrand🇺🇸

    I make some simple observations about the calculation of weighted averages over energy of Minkowski space spectral densities from weighted averages over time of Euclidean space correlation functions, measured in latice simulations. The correlator of two vector currents is used as an example, where it appears that a determination of a weighted average of the spectral function near the rho pole at the five per cent level is possible from lattice simulations.

    ↳ hep-lathep-phPRD(2022)·10 citations
16. 16*

    The Exact WKB analysis for asymmetric scalar preheating

    Seishi Enomoto🇨🇳 · Tomohiro Matsuda🇯🇵

    Using the exact WKB analysis of the higher-order differential equations, we analyze the asymmetry in dynamical particle production of a complex scalar field. The solution requires the Stokes phenomena of the fourth-order differential equation. We found that the interference of different types of the Stokes phenomena causes matter-antimatter asymmetry. We also showed a specific example where asymmetry is forbidden in the exact calculation, but a false asymmetry appears in the perturbative expansion.

    ↳ hep-thastro-ph.COhep-phJHEP(2023)·11 citations
17. 17*

    The Exact WKB analysis and the Stokes phenomena of the Unruh effect and Hawking radiation

    Seishi Enomoto🇨🇳 · Tomohiro Matsuda🇯🇵

    The physical observables of quantum theory can be described by perturbation theory, which is often given by diverging power series. This divergence is connected to the existence of non-perturbative phenomena, where resurgence allows us to study this connection. Applying this idea to the WKB expansion, the exact WKB analysis gives a clear connection to non-perturbative phenomena. In this paper, we apply the exact WKB analysis to the Unruh effect and Hawking radiation. The mechanism we found in this paper is similar to the Schwinger effect of a constant electric field, where the background is static but the Stokes phenomenon appears in the temporal part. Comparing this with a sonic black hole, our calculations show a clear discrepancy between them. Then, we briefly explain how quantum backreactions can be included in the exact WKB formalism.

    ↳ hep-thgr-qchep-phJHEP(2022)·16 citations
18. 18*

    Electric dipole moments due to nuclear Schiff moment interactions: A reassessment of the atoms ${}^{129}$Xe, ${}^{199}$Hg, and the molecule ${}^{205}$TlF

    Mickaël Hubert🇫🇷 · Timo Fleig🇫🇷

    We present relativistic many-body calculations of atomic and molecular Schiff-moment interaction constants including interelectron correlation effects using atomic Gaussian basis sets specifically optimized for the Schiff interaction. Our present best results employing a Gaussian nuclear density function are ${\alpha }_{\text{SM}}=(0.364\pm 0.025)\times 10^{-17}\frac{e\text{cm}}{e{\text{fm}}^3}$ for atomic ${}^{129}$Xe, ${\alpha }_{\text{SM}}=(-2.40\pm 0.24)\times 10^{-17}\frac{e\text{cm}}{e{\text{fm}}^3}$ for atomic ${}^{199}$Hg, and $W_{\text{SM}}=(39967\pm 3600)$ a.u. for the thallium nucleus in the molecule ${}^{205}$TlF. We discuss agreements and discrepancies between our present results and those from earlier calculations on the atoms ${}^{129}$Xe and ${}^{199}$Hg. Using the most recent measurements of $\mathcal{P},\mathcal{T}$-odd electric dipole moments and the present interaction constants reliable upper bounds on the Schiff moments of the ${}^{199}$Hg and ${}^{205}$Tl nuclei are determined in the context of a single-source assumption.

    ↳ physics.atom-phhep-phPRA(2022)·21 citations
19. 19*

    Longitudinal dynamics and particle production in relativistic nuclear collisions

    Chun Shen🇺🇸 · Björn Schenke🇺🇸

    This work presents a three-dimensional dynamical initialization model for relativistic heavy-ion collisions, implementing local energy-momentum conservation and baryon charge fluctuations at string junctions. Constraining parameters using experimental data from p+p collisions at various collision energies, the model provides a very good description of the charged hadron and net proton rapidity distributions in Au+Au collisions from 7.7 to 200 GeV and Pb+Pb collisions at 8.77 and 17.3 GeV. We demonstrate the importance of fluctuations of baryon densities to string junctions for describing net-proton distributions at collision energies of 62.4 and 200 GeV. Including this improved baryon stopping description along with the requirement of strangeness neutrality also yields a good description of identified particle yields as functions of the collision energy above 7.7 GeV. We further study asymmetric p+Al and (p, d, ${}^3$He)+Au collisions at the top RHIC energy and p+Pb, Xe+Xe, and Pb+Pb collisions at LHC energies. We identify the produced particle rapidity distributions in asymmetric collision systems as particularly useful for constraining models of the early-time longitudinal dynamics.

    ↳ nucl-thhep-phnucl-exPRC(2022)·80 citations
20. 20*

    Relativistic second-order dissipative spin hydrodynamics from the method of moments

    Nora Weickgenannt🇩🇪 · David Wagner🇩🇪 · Enrico Speranza🇺🇸 · Dirk Rischke🇩🇪

    We derive relativistic second-order dissipative fluid-dynamical equations of motion for massive spin-1/2 particles from kinetic theory using the method of moments. Besides the usual conservation laws for charge, energy, and momentum, such a theory of relativistic dissipative spin hydrodynamics features an equation of motion for the rank-3 spin tensor, which follows from the conservation of total angular momentum. Extending the conventional method of moments for spin-0 particles, we expand the spin-dependent distribution function near local equilibrium in terms of moments of the momentum and spin variables. We work to next-to-leading order in the Planck constant $\hslash$. As shown in previous work, at this order in $\hslash$ the Boltzmann equation for spin-1/2 particles features a nonlocal collision term. From the Boltzmann equation, we then obtain an infinite set of equations of motion for the irreducible moments of the deviation of the single-particle distribution function from local equilibrium. In order to close this system of moment equations, a truncation procedure is needed. We employ the "14+24-moment approximation", where "14" corresponds to the components of the charge current and the energy-momentum tensor and "24" to the components of the spin tensor, which completes the derivation of the equations of motion of second-order dissipative spin hydrodynamics. For applications to heavy-ion phenomenology, we also determine dissipative corrections to the Pauli-Lubanski vector.

    ↳ nucl-thhep-phhep-thPRD(2022)·129 citations
21. 21*

    Decay of multiple dark matter particles to dark radiation in different epochs does not alleviate the Hubble tension

    Luis A. Anchordoqui🇺🇸 · Vernon Barger🇺🇸 · Danny Marfatia🇺🇸 · Jorge F. Soriano🇺🇸

    Decaying cold dark matter (CDM) has been considered as a mechanism to tackle the tensions in the Hubble expansion rate and the clustering of matter. However, polarization measurements of the cosmic microwave background (CMB) severely constrain the fraction of dark matter decaying before recombination, and lensing of the CMB anisotropies by large-scale structure set strong constraints on dark matter decaying after recombination. Together, these constraints make an explanation of the Hubble tension in terms of decaying dark matter unlikely. In response to this situation, we investigate whether a dark matter ensemble with CDM particles decaying into free streaming dark radiation in different epochs can alleviate the problem. We find that it does not.

    ↳ astro-ph.COhep-phPRD(2022)·34 citations
22. 22*

    Study of two color QCD on large lattices

    A. Begun🇷🇺 · V. G. Bornyakov🇷🇺 · V. A. Goy🇷🇺 · A. Nakamura🇷🇺 · R. N. Rogalyov🇷🇺

    We study two colors lattice QCD (QC${}_2$D) with two flavors of staggered fermions on $40^4$ and $32^4$ lattices with lattice spacing $a=0.048$~fm in the wide range of the quark chemical potential ${\mu }_q$. Our focus is on the confinement-deconfinement transition in this theory. Thus we compute the string tension from the Wilson loops and the static quark free energy from the Polyakov loops. We find that the deconfinement transition found earlier in the range ${\mu }_q\approx 800-1000$ MeV is shifted to higher values. This shift is attributed to decreasing of the lattice spacing used in our simulations in comparison with the earlier study.

    ↳ hep-lathep-phPRD(2022)·26 citations
23. 23*

    Form factors of $B\to \pi \ell \nu$ and a determination of $|V_{ub}|$ with Möbius domain-wall-fermions

    Brian Colquhoun🇨🇦 · Shoji Hashimoto🇯🇵 · Takashi Kaneko🇯🇵 · Jonna Koponen🇩🇪

    Using a fully relativistic lattice fermion action, we compute the form factors of the semileptonic decay $B\to \pi \ell \nu$, which is required for the determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$. We employ the Möbius domain-wall fermion formalism for the generation of lattice ensembles with 2+1 sea quark flavours as well as for the valence heavy and light quarks. We compute the form factors at various values of the lattice spacing and multiple light and heavy quark masses, and extrapolate the results to the physical point. We combine our lattice results with the available experimental data to obtain $|V_{ub}|=(3.93\pm 0.41)\times 10^{-3}$.

    ↳ hep-lathep-exhep-phPRD(2022)·84 citations
24. 24*

    Topological defects in nonlocal field theories

    Luca Buoninfante🇸🇪 · Yuichi Miyashita🇯🇵 · Masahide Yamaguchi🇯🇵

    In this paper, we study for the first time topological defects in the context of nonlocal field theories in which Lagrangians contain infinite-order differential operators. In particular, we analyze domain walls. Despite the complexity of non-linear infinite-order differential equations, we are able to find an approximate analytic solution. We first determine the asymptotic behavior of the nonlocal domain wall close to the vacua. Then, we find a linearized nonlocal solution by perturbing around the well-known local 'kink', and show that it is consistent with the asymptotic behavior. We develop a formalism to study the solution around the origin, and use it to verify the validity of the linearized solution. We find that nonlocality makes the width of the domain wall thinner, and the energy per unit area smaller as compared to the local case. For the specific domain wall solution under investigation, we derive a theoretical constraint on the energy scale of nonlocality which must be larger than the corresponding symmetry-breaking scale. We also briefly comment on other topological defects like string and monopole.

    ↳ hep-thgr-qchep-phJHEP(2022)·6 citations
25. 25*

    Traces of a Heavy Field in Gravitational Waves

    Keisuke Inomata🇺🇸

    We discuss gravitational waves (GWs) induced by a heavy spectator field that starts to oscillate during inflation. During the oscillation of the spectator field, its effective mass can also oscillate in some potentials. This mass oscillation can resonantly amplify the spectator field fluctuations. We show that these amplified fluctuations can induce large GWs, which could be investigated by future gravitational wave observations. This kind of induced GW can be produced even if the spectator field does not have any interaction with other fields except for gravitational interaction.

    ↳ astro-ph.COgr-qchep-phPRD(2022)·8 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.