Fri·Jan 13, 2023Friday·January 13, 2023

1. 01*

   A viable $A_4$ 3HDM theory of quark mass matrices

   Iris Bree🇵🇹 · Sergio Carrolo🇵🇹 · Jorge C. Romao🇵🇹 · Joao P. Silva🇵🇹

   It is known that a three Higgs doublet model (3HDM)symmetric under an exact $A_4$ symmetry is not compatible with nonzero quark masses and/or non-block-diagonal CKM matrix. We show that a 3HDM with softly broken $A_4$ terms in the scalar potential does allow for a fit of quark mass matrices. Moreover, the result is consistent with $m_h=125\text{GeV}$ and the $h\to WW,ZZ$ signal. We also checked numerically that, for each point that passes all the constraints, the minimum is a global minimum of the potential.

   hep-phEPJC(2023)·11 citations
2. 02*

   Broad-Range Directional Detection of Light Dark Matter in Cryogenic Ice

   Nora Taufertshöfer🇺🇸 · Maurice Garcia-Sciveres🇺🇸 · Sinéad M. Griffin🇺🇸

   We propose hexagonal ice (H${}_2$O) as a new target for light dark matter (DM) direct detection. Ice, a polar material, is suitable for single phonon detection through DM scattering for which we consider light dark photon and light scalar mediator models. We report a rate sensitivity down to a DM mass of $\sim$keV, constituting a broader mass range than other promising candidates. We find better sensitivity for near-term experimental thresholds from the presence of high-frequency phonons. These advantages, and ice's availability, make it highly promising for single-phonon detection.

   hep-phphysics.ins-detPRD(2024)·14 citations
3. 03*

   Note on the evaluation of one type scalar three-point integral extracted from the Higgs boson decay

   Jin Zhang🇨🇳

   Motivated by the Higgs boson decaying to $gg$ at leading order approximation, the amplitude of scalar one loop three-point diagram with two different internal masses are evaluated and fully analytic results are obtained. The main ingredient of the evaluation is a integral in which the integrand is product of the reciprocal of the integral variable and a logarithm whose argument is a quadratic function of the general form. Complete analytic results for the two cases that there is no real root and there are two different real roots for the logarithm are presented. Applications of the results in this paper to radiative decays of the heavy quarks in the Standard Model and in the singlet vector-like model are discussed.

   hep-ph0 citations
4. 04*

   Isospin Mass Differences of the $B$, $D$ and $K$

   Matthew Rowe🇬🇧 · Roman Zwicky🇬🇧

   We compute the electromagnetic mass difference for the $B$-, $D$- and $K$-mesons using QCD sum rules with double dispersion relations. For the $B$- and $D$-mesons we also compute the linear quark mass correction, whereas for the $K$ the standard soft theorems prove more powerful. The mass differences, which have not previously been computed via a double dispersion, are fully consistent with experiment, albeit with large uncertainties.

   hep-phhep-latJHEP(2023)·4 citations
5. 05*

   Electroweak Phase Transition in a Right-Handed Neutrino Superfield Extended NMSSM

   Pankaj Borah🇮🇳 · Pradipta Ghosh🇮🇳 · Sourov Roy🇮🇳 · Abhijit Kumar Saha🇮🇳

   Supersymmetric models with singlet extensions can accommodate single- or multi-step first-order phase transitions (FOPT) along the various constituent field directions. Such a framework can also produce Gravitational Waves, detectable at the upcoming space-based interferometers, e.g., U-DECIGO. We explore the dynamics of electroweak phase transition and the production of Gravitational Waves in an extended set-up of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with a Standard Model singlet right-handed neutrino superfield. We examine the role of the new parameters compared to NMSSM on the phase transition dynamics and observe that the occurrence of a FOPT, an essential requirement for Electroweak Baryogenesis, typically favours a right-handed sneutrino state below 125 GeV. Our investigation shows how the analysis can offer complementary probes for physics beyond the Standard Model besides the collider searches.

   hep-phhep-exJHEP(2023)·25 citations
6. 06*

   Light vector meson photoproduction in ultraperipheral heavy ion collisions at the LHC within the Reggeometric Pomeron approach

   László Jenkovszky🇺🇦 · Érison S. Rocha🇧🇷 · Magno V. T. Machado🇧🇷

   By using the Reggeometric Pomeron model for vector meson production which successfully describes the high energy lepton-nucleon data, we analyse the light meson production in ultra-peripheral heavy ion collisions at the Large Hadron Collider (LHC). The rapidity distributions for $\rho$ and $\varphi$ photoproduction in lead-lead, xenon-xenon and oxygen-oxygen collisions are investigated.

   hep-phAstron.Nachr.(2023)·2 citations
7. 07*

   Searching for Heavy Neutral Leptons at A Future Muon Collider

   Tsz Hong Kwok🇨🇳 · Lingfeng Li🇺🇸 · Tao Liu🇨🇳 · Ariel Rock🇨🇳

   As the planning stages for a high energy muon collider enter a more concrete era, an important question arises as to what new physics could be uncovered. A TeV-scale muon collider is also a vector boson fusion (VBF) factory with a very clean background, and as such it is a promising environment to look for new physics that couples to the electroweak (EW) sector. In this paper, we explore the ability of a future TeV-scale muon collider to search for Majorana and Dirac Heavy Neutral Leptons (HNLs) produced via EW bosons. Employing a model-independent, conservative approach, we present an estimation of the production and decay rate of HNLs over a mass range between 200 GeV and 9.5 TeV in two benchmark collider proposals with $\sqrt{s}=3,10$ TeV, as well as an estimation of the dominant Standard Model (SM) background. We find that exclusion limits for the mixing between the HNLs and SM neutrinos can be as low as $\mathcal{O}(10^{-6})$. Additionally, we demonstrate that a TeV-scale muon collider allows for the ability to discriminate between Majorana and Dirac type HNLs for a large range of mixing values.

   hep-phhep-exPRD(2024)·51 citations
8. 08*

   Stop comparing resummation methods

   Johan Löfgren🇸🇪

   I argue that the consistency of any resummation method can be established if the method follows a power counting derived from a hierarchy of scales. I.e., whether it encodes a top-down effective field theory. This resolves much confusion over which resummation method to use once an approximation scheme is settled on. And if no hierarchy of scales exists, you should be wary about resumming. I give evidence from the study of phase transitions in thermal field theory, where adopting a consistent power-counting scheme and performing a strict perturbative expansion dissolves many common problems of such studies: gauge dependence, strong renormalization scale dependence, the Goldstone boson catastrophe, IR divergences, imaginary potentials, mirages (illusory barriers), perturbative breakdown, and linear terms.

   hep-phJ.Phys.G(2023)·29 citations
9. 09*

   Late vacuum choice and slow roll approximation in gravitational particle production during reheating

   Jose A. R. Cembranos🇪🇸 · Luis J. Garay🇪🇸 · Álvaro Parra-López🇪🇸 · Jose M. Sánchez Velázquez🇪🇸

   In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced particles. The commonly used adiabatic vacuum prescription for the extraction of produced particle spectra becomes a non-reliable definition of vacuum in the regimes for which this oscillatory behavior is important. In this work, we study particle production for a scalar field non-minimally coupled to gravity, taking into account the complete dynamics of spacetime during inflation and reheating. We derive an approximation for the solution to the mode equation during the slow-roll of the inflaton and analyze the importance of Ricci scalar oscillations in the resulting spectra. Additionally, we propose a prescription for the vacuum that allows to safely extrapolate the result to the present, given that the test field interacts only gravitationally. Lastly, we calculate the abundance of dark matter this mechanism yields and compare it to observations.

   ↳ gr-qchep-phhep-thJCAP(2023)·7 citations
10. 10*

    Extended Corona Models of X-ray Reverberation in the AGN 1H~0707-495 and IRAS 13224-3809

    S. Hancock · A. J. Young · P. Chainakun

    We fit a new vertically extended corona model to previously measured reverberation time lags observed by \emph{XMM-Newton} in two extremely variable Narrow Line Seyfert 1 Active Galactic Nuclei (AGN), 1H~0707-495 and IRAS~13224-3809, in a variety of similarly observed flux groups and explore the model in all observations over a 16 year period. The model employs two X-ray sources located along the black hole rotational axis at height, $h_1$ and $h_2$ respectively. These sources have their associated photon indices ${\Gamma }_1$ and ${\Gamma }_2$ which respond to fluctuations in the disc with a maximum response duration of $t_{\text{max}}$ and a propagation delay between the response of the two of $t_{\text{shift}}$. We find that for 1H 0707-495, $h_2$ is significantly correlated with ${\Gamma }_1$ and anti-correlated with ionisation $\xi$. Whilst the 1H 0707-495 corona extends upwards, the emission appears softer and the disc is less ionised. We find similarities in IRAS 13224-3809, but significant anti-correlation between ${\Gamma }_2$ and both $t_{\text{max}}$ and $t_{\text{shift}}$. This suggests that when the IRAS 13224-3809 corona becomes softer while extending vertically upwards, the overall corona response occurs faster. This may also suggest that the inner disc also becomes more active. In addition, ${\Gamma }_1$ and ${\Gamma }_2$ are extreme, relatively less variable, but more separate in IRAS 13224-3809 than in 1H 0707-495. This suggests that the IRAS 13224-3809 corona may be more patchy in the sense that it has two more clear distinct spectral zones of ${\Gamma }_1$ and ${\Gamma }_2$ (possibly relating to two distinct zones of coronal temperature) when compared to 1H 0707-495.

    ↳ astro-ph.HEhep-phMNRAS(2023)·14 citations
11. 11*

    5-D thermal field theory, Einstein field equations and spontaneous symmetry breaking

    S. Ganesh🇮🇳

    It has been shown previously, that the spatial thermal variation of a thermal medium can be recast as a variation in the Euclidean metric. It is now extended to temporal variations in temperature, for a non-relativistic thermal bath, which remains in local thermal equilibrium. This is achieved by examining the thermal field theory in a five-dimensional space-time-temperature. The bulk thermodynamic quantity, namely the energy density, is calculated for a neutral scalar field with a time-dependent Hamiltonian. Furthermore, the concept of recasting thermal variations as a variation in the metric is extended to thermal systems in a gravitational field. The Einstein field equations, in the 5-D space-time-temperature, is determined. It is shown that the resulting Ricci scalar can lead to spontaneous symmetry breaking, leading to the Higgs mechanism. In essence, the asymmetry in the distribution of temperature in space-time can translate to spontaneous symmetry breaking of particle fields, in a very strong gravitational field.

    ↳ hep-thcond-mat.othergr-qchep-ph+2Class.Quant.Grav.(2023)·4 citations
12. 12*

    Merging binary black holes formed through double-core evolution

    Y. Qin🇦🇺 · R. -C. Hu🇨🇳 · G. Meynet🇨🇭 · Y. Z. Wang🇨🇳 · J. -P. Zhu🇦🇺 · H. F. Song🇺🇸 · X. W. Shu🇨🇳 · S. C. Wu

    To date, various formation channels of merging events have been heavily explored with the detection of nearly 100 double black hole (BH) merger events reported by the LIGO-Virgo-KAGRA (LVK) Collaboration. We here systematically investigate an alternative formation scenario, i.e., binary BHs (BBHs) formed through double helium stars (hereafter double-core evolution channel). In this scenario, the two helium stars (He-rich stars) could be the outcome of the classical isolated binary evolution scenario involving with and without common-envelope phase (i.e., CE channel and stable mass transfer channel), or alternatively of massive close binaries evolving chemically homogeneously (i.e., CHE channel). We perform detailed stellar structure and binary evolution calculations that take into account internal differential rotation and mass loss of He-rich stars, as well as tidal interactions in binaries. For double He-rich stars with equal masses in binaries, we find that tides start to be at work on the Zero Age Helium Main Sequence (ZAHeMS: the time when a He-rich star starts to burn helium in the core, which is analogous to ZAMS for core hydrogen burning) for initial orbital periods not longer than 1.0 day, depending on the initial metallicities. Besides the stellar mass loss rate and tidal interactions in binaries, we find that the role of the angular momentum transport efficiency in determining the resulting BH spins, becomes stronger when considering BH progenitors originated from a higher metal-metallicity environment. We highlight that double-core evolution scenario does not always produce fast-spinning BBHs and compare the properties of the BBHs reported from the LVK with our modeling.

    ↳ astro-ph.HEastro-ph.SRhep-phAstron.Astrophys.(2023)·23 citations
13. 13*

    Wave-function-based emulation for nucleon-nucleon scattering in momentum space

    A. J. Garcia🇺🇸 · C. Drischler🇺🇸 · R. J. Furnstahl🇺🇸 · J. A. Melendez🇺🇸 · Xilin Zhang🇺🇸

    Emulators for low-energy nuclear physics can provide fast & accurate predictions of bound-state and scattering observables for applications that require repeated calculations with different parameters, such as Bayesian uncertainty quantification. In this paper, we extend a scattering emulator based on the Kohn variational principle (KVP) to momentum space (including coupled channels) with arbitrary boundary conditions, which enable the mitigation of spurious singularities known as Kohn anomalies. We test it on a modern chiral nucleon-nucleon (NN) interaction, including emulation of the coupled channels. We provide comparisons between a Lippmann-Schwinger equation emulator and our KVP momentum-space emulator for a representative set of neutron-proton (np) scattering observables, and also introduce a quasi-spline-based approach for the KVP-based emulator. Our findings show that while there are some trade-offs between accuracy and speed, all three emulators perform well. Self-contained Jupyter notebooks that generate the results and figures in this paper are publicly available.

    ↳ nucl-thhep-phphysics.data-anPRC(2023)·23 citations
14. 14*

    A guide to frames, $2\pi$'s, scales and corrections in string compactifications

    Bruno Valeixo Bento🇬🇧 · Dibya Chakraborty🇮🇳 · Susha Parameswaran🇬🇧 · Ivonne Zavala🇬🇧

    This note is intended to serve as a reference for conventions used in the literature on string compactifications, and how to move between them, collected in a single and easy-to-find place, using type IIB as an illustrative example. We hope it may be useful to beginners in the field and busy experts. E.g. string constructions proposed to address the moduli stabilisation problem are generically in regions of parameter space at the boundaries of control, so that consistent use of $2\pi$'s and frame conventions can be pivotal when computing their potentially dangerous corrections.

    ↳ hep-thgr-qchep-phInt.J.Mod.Phys.D(2025)·20 citations
15. 15*

    Laser Field Initiation of Higher Order Poles of S-Matrix-Optical Realization of Field Theoretic Models

    G. S. Agarwal

    We discuss the possibility of converting a simple pole in the radiative decay of a state into a pole of higher order by using resonant electromagnetic fields. This process of creation of higher order pole is controllable by the intensity of the laser field. We use density matrix and Liouville space and present the modification of the Lorentzian line shapes (Breit-Wigner formula) for example to ones involving square of Lorentzian and derivatives of Lorentzians.

    ↳ physics.opticshep-ph1 citation
16. 16*

    Exploring light dark matter with the DarkSPHERE spherical proportional counter electroformed underground at the Boulby Underground Laboratory

    L. Balogh🇨🇦 · C. Beaufort🇫🇷 · M. Chapellier🇫🇷 · E. C. Corcoran🇨🇦 · J. -M. Coquillat🇨🇦 · A. Dastgheibi-Fard🇫🇷 · Y. Deng🇨🇦 · D. Durnford🇨🇦 · C. Garrah🇨🇦 · G. Gerbier🇨🇦 · I. Giomataris🇫🇷 · G. Giroux🇨🇦 and 28 other authors

    We present the conceptual design and the physics potential of DarkSPHERE, a proposed 3 m in diameter spherical proportional counter electroformed underground at the Boulby Underground Laboratory. This effort builds on the R&D performed and experience acquired by the NEWS-G Collaboration. DarkSPHERE is primarily designed to search for nuclear recoils from light dark matter in the 0.05--10 GeV mass range. Electroforming the spherical shell and the implementation of a shield based on pure water ensures a background level below 0.01 dru. These, combined with the proposed helium-isobutane gas mixture, will provide sensitivity to the spin-independent nucleon cross-section of $2\times 10^{-41}(2\times 10^{-43})$ cm${}^2$ for a dark matter mass of $0.1(1)$ GeV. The use of a hydrogen-rich gas mixture with a natural abundance of ${}^{13}$C provides sensitivity to spin-dependent nucleon cross-sections more than two orders of magnitude below existing constraints for dark matter lighter than 1 GeV. The characteristics of the detector also make it suitable for searches of other dark matter signatures, including scattering of MeV-scale dark matter with electrons, and super-heavy dark matter with masses around the Planck scale that leave extended ionisation tracks in the detector.

    ↳ hep-exhep-phPRD(2023)·29 citations
17. 17*

    Running vacuum in QFT in FLRW spacetime: The dynamics of ${\rho }_{\mathrm{vac}}(H)$ from the quantized matter fields

    Cristian Moreno-Pulido🇪🇸 · Joan Sola Peracaula🇪🇸 · Samira Cheraghchi🇷🇴

    Phenomenological work in the last few years has provided significant support to the idea that the vacuum energy density (VED) is a running quantity with the cosmological evolution and that this running helps to alleviate the cosmological tensions afflicting the $\Lambda$CDM. On the theoretical side, recent devoted studies have shown that the properly renormalized ${\rho }_{\mathrm{vac}}$ in QFT in FLRW spacetime adopts the "running vacuum model" (RVM) form. While in three previous studies by two of us (CMP and JSP) such computations focused solely on scalar fields non-minimally coupled to gravity, in the present work we compute the spin-$1/2$ fermionic contributions and combine them both. The calculation is performed using a new version of the adiabatic renormalization procedure based on subtracting the UV divergences at an off-shell renormalization point $M$. The quantum scaling of ${\rho }_{\mathrm{vac}}$ with $M$ turns into cosmic evolution with the Hubble rate, $H$. As a result the "cosmological constant" $\Lambda$ appears in our framework as the nearly sustained value of $8\pi G(H){\rho }_{\mathrm{vac}}(H)$ around (any) given epoch $H$, where $G(H)$ is the gravitational coupling, which is also running, although very mildly (logarithmically). We find that the VED evolution at present reads $\delta {\rho }_{\mathrm{vac}}(H)\sim {\nu }_{\mathrm{eff}}{m}_{\mathrm{Pl}}^2\left(H^2-H_0^2\right)(|{\nu }_{\mathrm{eff}}|\ll 1)$. The coefficient ${\nu }_{\mathrm{eff}}$ receives contributions from all the quantized fields, bosons and fermions. Remarkably, there also exist higher powers $\mathcal{O}(H^6)$ which can trigger inflation in the early universe. Finally, the equation of state (EoS) of the vacuum receives also quantum corrections from bosons and fermion fields, shifting its value from -1. The striking consequence is that the EoS of the quantum vacuum may nowadays effectively appears as quintessence.

    ↳ gr-qcastro-ph.COhep-phhep-thEPJC(2023)·59 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.