Thu·Nov 4, 2021Thursday·November 4, 2021

1. 01*

   Higgs Boson Production and Quark Scattering Amplitudes at High Energy through the Next-to-Next-to-Leading Power in Quark Mass

   Tao Liu🇨🇳 · Sneh Modi🇨🇦 · Alexander A. Penin🇨🇦

   We study the amplitudes of the quark scattering by an external electromagnetic field and of the light quark mediated Higgs boson production via gluon fusion in the high-energy limit. The asymptotic behavior of the quark form factors is obtained in the double-logarithmic approximation to all orders in strong coupling constant through $\mathcal{O}(m_q^3)$ in the small quark mass expansion and the asymptotic formula is given in a closed analytic form. In the case of the two-gluon Higgs boson form factor we obtain a complete analytic result for the three-loop $\mathcal{O}(m_q^3)$ double-logarithmic term while the all-order analysis is performed in the large-$N_c$ limit of QCD and for the abelian gauge group. An estimate of the high-order high-power light quark mass effect in the Higgs boson production and decay is given.

   hep-phJHEP(2022)·25 citations
2. 02*

   Improved Constraints on Effective Top Quark Interactions using Edge Convolution Networks

   Oliver Atkinson🇬🇧 · Akanksha Bhardwaj🇬🇧 · Stephen Brown🇬🇧 · Christoph Englert🇬🇧 · David J. Miller🇬🇧 · Panagiotis Stylianou🇬🇧

   We explore the potential of Graph Neural Networks (GNNs) to improve the performance of high-dimensional effective field theory parameter fits to collider data beyond traditional rectangular cut-based differential distribution analyses. In this study, we focus on a SMEFT analysis of $pp\to t\bar{t}$ production, including top decays, where the linear effective field deformation is parametrised by thirteen independent Wilson coefficients. The application of GNNs allows us to condense the multidimensional phase space information available for the discrimination of BSM effects from the SM expectation by considering all available final state correlations directly. The number of contributing new physics couplings very quickly leads to statistical limitations when the GNN output is directly employed as an EFT discrimination tool. However, a selection based on minimising the SM contribution enhances the fit's sensitivity when reflected as a (non-rectangular) selection on the inclusive data samples that are typically employed when looking for non-resonant deviations from the SM by means of differential distributions.

   hep-phhep-exJHEP(2022)·22 citations
3. 03*

   Tadpole contribution to magnetic photon-graviton conversion

   Naser Ahmadiniaz🇩🇪 · Fiorenzo Bastianelli🇮🇹 · Felix Karbstein🇩🇪 · Christian Schubert🇲🇽

   Photon-graviton conversion in a magnetic field is a process that is usually studied at tree level, but the one-loop corrections due to scalars and spinors have also been calculated. Differently from the tree-level process, at one-loop one finds the amplitude to depend on the photon polarization, leading to dichroism. However, previous calculations overlooked a tadpole contribution of the type that was considered to be vanishing in QED for decades but erroneously so, as shown by H. Gies and one of the authors in 2016. Here we compute this missing diagram in closed form, and show that it does not contribute to dichroism.

   hep-phgr-qchep-th3 citations
4. 04*

   Directed flow of charged particles within idealized viscous hydrodynamics at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider

   Ze-Fang Jiang🇨🇳 · C. B. Yang🇨🇳 · Qi Peng🇨🇳

   Following the Boz$\dot{\text{e}}$k-Wyskiel parametrization tilted initial condition, an alternative way to construct a longitudinal tilted fireball based on the Glauber collision geometry is presented. This longitudinal tilted initial condition combined with the Ideal-CLVisc (3 + 1)D hydrodynamic model, a nonvanishing directed flow coefficient $v_1$ in a wide rapidity range is observed. After comparing the model's results with experimentally observed data of directed flow coefficient $v_1(\eta )$ from $\sqrt{s_{NN}}$ = 200 GeV Cu + Cu, Au + Au collisions at RHIC energy to $\sqrt{s_{NN}}$ = 2.76 TeV and $\sqrt{s_{NN}}$ = 5.02 TeV Pb + Pb collisions at the LHC energy. We find that the directed flow measurements in heavy-ion collisions can set strong constraints on the imbalance of forward and backward incoming nuclei and on the magnitude asymmetry of pressure gradients along the $x$ direction.

   hep-phnucl-exnucl-thPRC(2021)·20 citations
5. 05*

   Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections

   Hadi Hashamipour🇮🇷 · Muhammad Goharipour🇮🇷 · K. Azizi🇮🇷 · S.V. Goloskokov🇷🇺

   We determine the valence generalized parton distributions (GPDs) $H_v^q$ and $E_v^q$ with their uncertainties at zero skewness by performing a ${\chi }^2$ analysis of the world electron scattering data considering two-photon exchange corrections. The data include a wide and updated range of the electric and magnetic form factors (FFs) of the proton and neutron. As a result, we find that there are no enough constraints on GPDs $E_v^q$ from FFs data solely though $H_v^q$ are well constrained. By including the new data of the charge and magnetic radius of the nucleon in the analysis, we show that they put new constraints on the final GPDs, especially on $E_v^q$. Moreover, we calculate the gravitational FF $M_2$ and the total angular momentum $J^q$ using the extracted GPDs and compare them with the FFs obtained from the light-cone QCD sum rules (LCSR) and Lattice QCD. We show that our results are interestingly in a good consistency with the pure theoretical predictions.

   hep-phhep-exhep-latPRD(2022)·30 citations
6. 06*

   Sizable Time-reversal violating effects in bottom baryon decays

   Chia-Wei Liu🇨🇳 · Chao-Qiang Geng🇨🇳

   We study time-reversal~(T) asymmetries in the charmless two-body decays of antitriplet bottom baryons. We find that in ${\mathbf{B}}_b\to {\mathbf{B}}_{n}P$ with ${\mathbf{B}}_b=({\Xi }_b^{-},{\Xi }_b^0,{\Lambda }_b)$ and ${\mathbf{B}}_n(P)$ a octet baryon (pseudoscalar meson), the positive and negative helicity amplitudes are both sizable, resulting in the large T-violating effects. Particularly, the T-odd parameters, ${\beta }_w$, for the color-enhanced channels are expected to be around $40\%$ and $-25\%$ in $b\to s$ and $b\to d$ transitions for the standard model, which can be measured by the experiments at LHCb, respectively. On the other hand, in ${\mathbf{B}}_b\to {\mathbf{B}}_{n}V(\gamma )$ with $V(\gamma )$ a vector meson~(photon), the decays are predominated by a single helicity amplitude, and the T violating effects by the correlations among spins are suppressed. We also explore the T violating observables for the ${\Xi }_b$ decays based on the angular distributions.

   hep-phhep-exJHEP(2022)·11 citations
7. 07*

   Recent developments in the Parton Branching approach to TMDs

   Lissa Keersmaekers🇧🇪 · Sara Taheri Monfared🇩🇪

   The Parton Branching (PB) Method describes the evolution of transverse momentum dependent parton densities (TMDs). The obtained TMDs can be used in Monte Carlo generators to describe physical observables. We give an overview of recent developments, in particular the new application of PB TMDs in Drell-Yan + jets production, the four-flavor and five-flavor schemes for heavy quark contributions, and the inclusion of QED corrections in the PB evolution.

   hep-phPoS(2022)·0 citations
8. 08*

   Fiducial cross sections for the lepton-pair-plus-photon decay mode in Higgs production up to NNLO QCD

   X. Chen🇩🇪 · T. Gehrmann🇨🇭 · E.W.N. Glover🇬🇧 · A. Huss🇨🇭

   The rare three-body decay of a Higgs boson to a lepton-antilepton pair and a photon is starting to become experimentally accessible at the LHC. We investigate how higher-order QCD corrections to the dominant gluon-fusion production process impact on the fiducial cross sections in this specific Higgs decay mode for electrons and muons. Corrections up to NNLO QCD are found to be sizeable. They are generally uniform in kinematical variables related to the Higgs boson, but display several distinctive features in the kinematics of its individual decay products.

   hep-phJHEP(2022)·9 citations
9. 09*

   Central Instanton Production

   V. A. Khoze🇬🇧 · V. V. Khoze🇬🇧 · D. L. Milne🇬🇧 · M. G. Ryskin🇷🇺

   We study the central production of QCD instantons at hadron colliders in events with two large rapidity gaps. These gaps in rapidity are formed by either Pomeron or photon exchanges or a combination of the two. The kT-factorization formalism is used to reduce the factorization scale dependence. We compute for the first time the relevant differential cross-sections for a complete set of central instanton production processes at the LHC, including gluon-induced and quark-induced amplitudes, and also show that the largest contribution comes from processes with Pomeron exchanges where a single gluon from each Pomeron couples to the instanton.

   hep-phhep-exhep-thPRD(2022)·6 citations
10. 10*

    On the nature of the mass-gap object in the GW190814 event

    Luiz L. Lopes🇧🇷 · Debora P. Menezes🇧🇷

    In this work, we make a very extensive study on the conditions that allow the mass-gap object in the GW190814 event to be faced as a degenerate star instead of a black hole. We begin revisiting some parametrizations of the Quantum Hadrodynamics (QHD) and then study under which conditions the hyperons are present in such a massive star. Afterward, using a vector MIT based model, we study if self-bound quark stars, satisfying the Bodmer-Witten conjecture fulfill all the observational constraints. Finally, we study hybrid stars within a Maxwell construction and check for what values of the bag, as well as the vector interaction, a quark core star with only nucleons, and with nucleons admixed with hyperons can reach at least 2.50 M${}_{\odot }$. We conclude that, depending on the choice of parameters, none of the possibilities can be completely ruled out, i.e., the mass-gap object can be a hadronic (either nucleonic or hyperonic), a quark, or a hybrid star. However, some cases are more probable than others.

    hep-phastro-ph.HEnucl-thApJ(2022)·45 citations
11. 11*

    On the ambiguity between differential and integral forms of the Martin-Ryskin-Watt unintegrated parton distribution function model

    Ramin Kord Valeshabadi🇮🇷 · Majid Modarres🇮🇷

    In this work, we study the structure of the leading order Martin-Ryskin-Watt (MRW) unintegrated parton distribution function (UPDF) and explain in detail why there exists discrepancy between the two different definitions of this UPDF model, i.e., the integral (I-MRW) and differential (D-MRW) MRW UPDFs. We perform this investigation with both angular and strong ordering cutoffs. The derivation footsteps of obtaining the I-MRW UPDF from the D-MRW ones are numerically performed, and the reason of such non-equivalency between the two forms is clearly explained. We show and find out that both methods suggested in the papers by Golec-Biernat and Stasto as well as that of Guiot have shortcomings, and only the combination of their prescriptions can give us the same UPDF structure from both of these two different versions of the MRW UPDF, namely I-MRW and the D-MRW UPDFs.

    hep-phhep-thEPJC(2022)·13 citations
12. 12*

    Small x Improved Transverse Momentum Dependent Factorization and some of its recent applications

    Krzysztof Kutak🇵🇱

    In this talk I am going to present some of recent phenomenological applications of the ITMD [1,2] formalism extended to account for Sudakov form factor. In particular production of dijets in the future Electron Ion Collider is discussed.

    hep-phPoS(2022)·0 citations
13. 13*

    Precision QCD Physics at the LHC

    Thomas Gehrmann🇨🇭 · Bogdan Malaescu🇫🇷

    This review describes the current status of precision QCD studies at the LHC. We introduce the main experimental and theoretical methods, discussing also their cross-stimulated developments and recent advances. The different types of QCD observables that are measured at the LHC, including cross-sections, event- and jet-level properties, for various final states, are summarised. Their relation to fundamental QCD dynamics and their impact on Standard Model parameter determinations are discussed on specific examples. The impact of QCD-related observables on direct and indirect searches for rare processes within and new physics beyond the Standard Model is outlined.

    hep-phhep-exAnn.Rev.Nucl.Part.Sci.(2022)·24 citations
14. 14*

    Prescription for finite oblique parameters $S$ and $U$ in extensions of the SM with $m_W\ne m_Z\cos {\theta }_W$

    Francisco Albergaria🇵🇹 · Luís Lavoura🇵🇹

    We consider extensions of the Standard Model with neutral scalars in multiplets of $SU(2)$ larger than doublets. When those scalars acquire vacuum expectation values, the resulting masses of the gauge bosons $W^{\pm }$ and $Z^0$ are not related by $m_W=m_Z\cos {\theta }_W$. In those extensions of the Standard Model the oblique parameters $S$ and $U$, when computed at the one-loop level, turn out to be either gauge-dependent or divergent. We show that one may eliminate this problem by modifying the Feynman rules of the Standard Model for some vertices containing the Higgs boson; the modifying factors are equal to $1$ in the limit $m_W=m_Z\cos {\theta }_W$. We give the result for $S$ in a model with arbitrary numbers of scalar $SU(2)$ triplets with weak hypercharges either $0$ or $1$.

    hep-phJ.Phys.G(2022)·12 citations
15. 15*

    Higher-order non-global logarithms from jet calculus

    Andrea Banfi🇬🇧 · Frédéric A. Dreyer🇬🇧 · Pier Francesco Monni🇨🇭

    Non-global QCD observables are characterised by a sensitivity to the full angular distribution of soft radiation emitted coherently in hard scattering processes. This complexity poses a challenge to their all-order resummation, that was formulated at the leading-logarithmic order about two decades ago. In this article we present a solution to the long-standing problem of their resummation beyond this order, and carry out the first complete next-to-leading logarithmic calculation for non-global observables. This is achieved by solving numerically the recently derived set of non-linear differential equations which describe the evolution of soft radiation in the planar, large-$N_c$ limit. As a case study we address the calculation of the transverse energy distribution in the interjet rapidity region in $e^{+}{e}^{-}\to$ dijet production. The calculation is performed by means of an algorithm that we formulate in the language of jet-calculus generating functionals, which also makes the resummation technique applicable to more general non-global problems, such as those that arise in hadronic collisions. We find that NLL corrections are substantial and their inclusion leads to a significant reduction of the perturbative scale uncertainties for these observables. The computer code used in the calculations is made publicly available.

    hep-phhep-exJHEP(2022)·52 citations
16. 16*

    Patterns of $C$- and $CP$-violation in hadronic $\eta$ and ${\eta }^{\prime }$ three-body decays

    Hakan Akdag🇩🇪 · Tobias Isken🇩🇪 · Bastian Kubis🇩🇪

    We construct hadronic amplitudes for the three-body decays ${\eta }^{(\prime )}\to {\pi }^{+}{\pi }^{-}{\pi }^0$ and ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ in a non-perturbative fashion, allowing for $C$- and $CP$-violating asymmetries in the ${\pi }^{+}{\pi }^{-}$ distributions. These amplitudes are consistent with the constraints of analyticity and unitarity. We find that the currently most accurate Dalitz-plot distributions taken by the KLOE-2 and BESIII collaborations confine the patterns of these asymmetries to a relative per mille level. Our dispersive representation allows us to extract the individual coupling strengths of the $C$- and $CP$-violating contributions arising from effective isoscalar and isotensor operators in ${\eta }^{(\prime )}\to {\pi }^{+}{\pi }^{-}{\pi }^0$ and an effective isovector operator in ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$, while the strongly different sensitivities to these operators can be understood from chiral power counting arguments.

    hep-phhep-exnucl-thJHEP(2022)·27 citations
17. 17*

    $pp$ Solar Neutrinos at DARWIN

    André de Gouvêa🇺🇸 · Emma McGinness🇺🇸 · Ivan Martinez-Soler🇺🇸 · Yuber F. Perez-Gonzalez🇬🇧

    The DARWIN collaboration recently argued that DARWIN (DARk matter WImp search with liquid xenoN) can collect, via neutrino--electron scattering, a large, useful sample of solar $pp$-neutrinos, and measure their survival probability with sub-percent precision. We explore the physics potential of such a sample in more detail. We estimate that, with 300 ton-years of data, DARWIN can also measure, with the help of current solar neutrino data, the value of ${\sin }^2{\theta }_{13}$, with the potential to exclude ${\sin }^2{\theta }_{13}=0$ close to the three-sigma level. We explore in some detail how well DARWIN can constrain the existence of a new neutrino mass-eigenstate ${\nu }_4$ that is quasi-mass-degenerate with ${\nu }_1$ and find that DARWIN's sensitivity supersedes that of all current and near-future searches for new, very light neutrinos. In particular, DARWIN can test the hypothesis that ${\nu }_1$ is a pseudo-Dirac fermion as long as the induced mass-squared difference is larger than $10^{-13}$ eV${}^2$, one order of magnitude more sensitive than existing constraints. Throughout, we allowed for the hypotheses that DARWIN is filled with natural xenon or ${}^{136}$Xe-depleted xenon.

    hep-phPRD(2022)·25 citations
18. 18*

    Long-Lived Light Mediators from Higgs boson Decay at HL-LHC, FCC-hh and a Proposal of Dedicated LLP Detectors for FCC-hh

    Biplob Bhattacherjee🇮🇳 · Shigeki Matsumoto🇯🇵 · Rhitaja Sengupta🇮🇳

    We study the pair production of the long-lived mediator particles from the decay of the SM Higgs boson and their subsequent decay into standard model particles. We compute the projected sensitivity, both model-independently and with a minimal model, of using the muon spectrometer of the CMS detector at the HL-LHC experiment for ggF, VBF, and Vh production modes of the Higgs boson and various decay modes of the mediator particle, along with dedicated detectors for LLP searches like CODEX-b and MATHUSLA. Subsequently, we study the improvement with the FCC-hh detector at the 100\,TeV collider experiment for such long-lived mediators, again focusing on the muon spectrometer. We propose dedicated LLP detector designs for the 100\,TeV collider experiment, DELIGHT (\textbf{De}tector for \textbf{l}ong-l\textbf{i}ved particles at hi\textbf{gh} energy of 100\,\textbf{T}eV), and study their sensitivities.

    hep-phhep-exPRD(2022)·35 citations
19. 19*

    Tests of Lorentz Invariance

    Jun-Jie Wei🇨🇳 · Xue-Feng Wu🇨🇳

    Lorentz invariance is a fundamental symmetry of both Einstein's theory of general relativity and quantum field theory. However, deviations from Lorentz invariance at energies approaching the Planck scale are predicted in many quantum gravity theories seeking to unify the force of gravity with the other three fundamental forces of matter. Even though any violations of Lorentz invariance are expected to be very small at observable energies, they can increase with energy and accumulate to detectable levels over large distances. Astrophysical observations involving high-energy emissions and long baselines can therefore offer exceptionally sensitive tests of Lorentz invariance. With the extreme features of astrophysical phenomena, it is possible to effectively search for signatures of Lorentz invariance violations (LIV) in the photon sector, such as vacuum dispersion, vacuum birefringence, photon decay, and photon splitting. All of these potential signatures have been studied carefully using different methods over the past few decades. This chapter attempts to review the status of our current knowledge and understanding of LIV, with particular emphasis on a summary of various astrophysical tests that have been used to set lower limits on the LIV energy scales.

    ↳ astro-ph.HEgr-qchep-ph19 citations
20. 20*

    Parity and Time Reversal Invariance Violation in Neutron-Nucleus Scattering

    V. V. Flambaum🇦🇺 · A. J. Mansour🇦🇺

    Parity violating (PV) as well as parity and time-reversal invariance violating (PTRIV) effects are enhanced a million times in neutron reactions near p-wave compound resonances. We present the calculation of such effects using a statistical theory based on the properties of chaotic eigenstates and discuss a possibility to extract the strength constants of PTRIV interactions from the experimental data, including nucleon-nucleon and pion-nucleon CP-violating interactions, the QCD theta-term and the quark chromo-EDM. PV effects have random sign for all target nuclei except for 232Th, where PV effects of a positive sign have been observed for ten statistically significant p-wave resonances, with energy smaller than 250 eV. This may be an indication of a possible regular (non-chaotic) contribution to PV effects. We link this regular effect to the doublets of opposite parity states in the rotation spectra of nuclei with an octupole deformation and suggest other target nuclei where this hypothesis may be tested. We also discuss a permanent sign contribution produced by doorway states. An estimate of the ratio of PTRIV effects to PV effects is presented. Although a polarised target is not needed for the measurement of PV effects, for the interpretation of the results, it may be convenient to do both PV and PTRIV experiments with a polarised target.

    ↳ nucl-thhep-phPRC(2022)·8 citations
21. 21*

    What is chiral susceptibility probing?

    JLQCD collaboration: S. Aoki🇯🇵 · Y. Aoki🇯🇵 · H. Fukaya🇯🇵 · S. Hashimoto🇯🇵 · C. Rohrhofer🇯🇵 · K. Suzuki🇯🇵

    In the early days of QCD, the axial $U(1)$ anomaly was considered as a trigger for the breaking of the $SU(2{)}_L\times SU(2{)}_R$ symmetry through topological excitations of gluon fields. However, it has been a challenge for lattice QCD to quantify the effect. In this work, we simulate QCD at high temperatures with chiral fermions. The exact chiral symmetry enables us to separate the contribution from the axial $U(1)$ breaking from others among the susceptibilities in the scalar and pseudoscalar channels. Our result in two-flavor QCD indicates that the chiral susceptibility, which is conventionally used as a probe for $SU(2{)}_L\times SU(2{)}_R$ breaking, is actually dominated by the axial $U(1)$ breaking at temperatures $T\ge 165$ MeV.

    ↳ hep-lathep-phPoS(2022)·3 citations
22. 22*

    Cancellation of IR Divergences in 3d Abelian Gauge Theories

    Giovanni Galati🇮🇹 · Marco Serone🇮🇹

    Three dimensional abelian gauge theories classically in a Coulomb phase are affected by IR divergences even when the matter fields are all massive. Using generalizations of Ward-Takahashi identities, we show that correlation functions of gauge-invariant operators are IR finite to all orders in perturbation theory. Gauge invariance is sufficient but not necessary for IR finiteness. In particular we show that specific gauge-variant correlators, including the two-point function of matter fields, are also IR finite to all orders in perturbation theory. Possible applications of these results are briefly discussed.

    ↳ hep-thcond-mat.stat-mechcond-mat.str-elhep-lat+1JHEP(2022)·4 citations
23. 23*

    The static energy in 2+1+1-flavor QCD

    Sebastian Steinbeißer🇩🇪 · Nora Brambilla🇩🇪 · Rafael L. Delgado🇪🇸 · Andreas S. Kronfeld🇺🇸 · Viljami Leino🇩🇪 · Peter Petreczky🇺🇸 · Antonio Vairo🇩🇪 · Johannes Heinrich Weber🇩🇪

    We report on the status of the analysis of the static energy in $2+1+1$-flavor QCD. The static energy is obtained by measuring Wilson line correlators in Coulomb gauge using the HISQ action, yielding the scales $r_0/a$, $r_1/a$, $r_2/a$, their ratios, and the string tension $\sigma r_i^2$. We put emphasis on the possible effects due to the dynamical charm-quark by comparing the lattice results to continuum results of the static energy with and without a massive flavor at two-loop accuracy. We employ gauge-field ensembles from the HotQCD and MILC Collaborations.

    ↳ hep-lathep-phhep-thPoS(2022)·2 citations
24. 24*

    New physics searches with the International Large Detector at the ILC

    Mikael Berggren (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany)🇩🇪

    Although the LHC experiments have searched for and excluded many proposed new particles up to masses close to 1 TeV, there are many scenarios that are difficult to address at a hadron collider. This talk will review a number of these scenarios and present the expectations for searches at an electron-positron collider such as the International Linear Collider. The cases discussed include the light Higgsino, the \stau~ slepton in the coannihilation region relevant to dark matter, as well as other SUSY signatures. he studies are based on the ILD concept at the ILC.

    ↳ hep-exhep-phPoS(2022)·3 citations
25. 25*

    Electroweak bubble wall expansion: gravitational waves and baryogenesis in Standard Model-like thermal plasma

    Marek Lewicki🇵🇱 · Marco Merchand🇵🇱 · Mateusz Zych🇵🇱

    Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon asymmetry of the universe and the spectrum of gravitational waves. By means of the semi-classical formalism we calculate the velocity and thickness of the wall using as theoretical framework the scalar singlet extension of the SM with a parity symmetry and the SM effective field theory supplemented by a dimension six operator. We use these solutions to carefully predict the baryon asymmetry and the gravitational wave signals. The singlet scenario can easily accommodate the observed asymmetry but these solutions do not lead to observable effects at future gravity wave experiments. In contrast the effective field theory fails at explaining the baryon abundance due to the strict constraints from electric dipole moment experiments, however, the strongest solutions we found fall within the sensitivity of the LISA experiment. We provide a simple analytical approximation for the wall velocity which only requires calculation of the strength and temperature of the transition and works reasonably well in all models tested. We find that generically the weak transitions where the fluid approximation can be used to calculate the wall velocity and verify baryogenesis produce signals too weak to be observed in future gravitational wave experiments. Thus, we infer that GW signals produced by simple SM extensions visible in future experiments are likely to only be produced in strong transitions described by detonations with highly relativistic wall velocities.

    ↳ astro-ph.COhep-phJHEP(2022)·136 citations
26. 26*

    Premature Black Hole Death of Population III Stars by Dark Matter

    Sebastian A. R. Ellis🇨🇭

    Population III stars were the first generation of stars, formed in minihalos of roughly primordial element abundances, and therefore metal-free. They are thought to have formed at the cores of dense dark matter clouds. Interactions between baryons and dark matter can therefore have had an important impact on their evolution. In this paper we consider the capture of non- or weakly-annihilating dark matter by these early massive stars. In a wide region of parameter space, interactions of dark matter with baryons lead to premature death of the star as a black hole. We sketch how this modification of the standard evolutionary history of Population III stars might impact the epoch of reionisation, by modifying the amount of UV emission, the transition to Population II star formation, and the X-ray and radio emission from accretion onto the black hole remnants. Signals of massive black holes originating from Population III stars could be observed through gravitational waves from their mergers. Finally, the observation of pair-instability supernovae could effectively preclude premature black hole death across a wide range of parameter space, ranging in mass from $m_{DM}\sim 0.1\text{ GeV}$ to $m_{DM}\sim m_{\mathrm{Pl}}$.

    ↳ astro-ph.COastro-ph.HEastro-ph.SRhep-phJCAP(2022)·19 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.