Thu·Oct 27, 2022Thursday·October 27, 2022

1. 01*

   CP-odd and CP-even Weak-Basis Invariants in the Presence of Vector-Like Quarks

   Francisco Albergaria🇵🇹 · G.C. Branco🇵🇹 · José Filipe Bastos🇵🇹 · J.I. Silva-Marcos🇵🇹

   We propose a minimal set of weak-basis invariants in an extension of the SM where one up-type isosinglet vector-like quark is introduced, which allows us to obtain all the physical content of the CKM matrix. We present CP-odd invariants of lower order in mass than the one in the SM, which may have important consequences for Baryogenesis. We study the extreme chiral limit, where the two lightest generations have vanishing mass, showing that in this extension, contrary to the SM, CP violation can be observed in collisions much above the electroweak scale.

   hep-phJ.Phys.G(2023)·6 citations
2. 02*

   Numerical study of the twist-3 asymmetry $A_{LT}$ in single-inclusive electron-nucleon and proton-proton collisions

   Brandon Bauer🇺🇸 · Daniel Pitonyak🇺🇸 · Cody Shay🇺🇸

   We provide the first rigorous numerical analysis of the longitudinal-transverse double-spin asymmetry $A_{LT}$ in electron-nucleon and proton-proton collisions for the case where only a single pion, jet, or photon is detected in the final state. Given recent extractions of certain, previously unknown, non-perturbative functions, we are able to compute contributions from all terms relevant for $A_{LT}$ and make realistic predictions for the observable at Jefferson Lab (JLab) 12 GeV, COMPASS, the future Electron-Ion Collider, and the Relativistic Heavy Ion Collider. We also compare our results to a JLab 6 GeV measurement, which are the only data available for this type of reaction. The twist-3 nature of $A_{LT}$ makes it a potentially fruitful avenue to probe quark-gluon-quark correlations in hadrons as well as provide insights into dynamical quark mass generation in QCD.

   hep-phhep-exnucl-exnucl-thPRD(2023)·7 citations
3. 03*

   Anatomy of the Electroweak Phase Transition for Dark Sector induced Baryogenesis

   Marcela Carena🇺🇸 · Ying-Ying Li🇺🇸 · Tong Ou🇺🇸 · Yikun Wang🇺🇸

   We investigate the electroweak phase transition patterns for a recently proposed baryogenesis model with CP violation originated in the dark sector. The model includes a complex scalar singlet-Higgs boson portal, a $U(1{)}_l$ gauge lepton symmetry with a $Z^{\prime }$ gauge boson portal and a fermionic dark matter particle. We find a novel thermal history of the scalar sector, featuring a $Z_2$ breaking singlet vacuum in the early Universe driven by a dark Yukawa coupling, that induces a one-step strongly first order electroweak phase transition. We explore the parameter space that generates the observed matter-antimatter asymmetry and dark matter relic abundance, while being consistent with constraints from electric dipole moment and collider searches, and dark matter direct detection bounds. The complex singlet can be produced via the Higgs portal and decays into Standard Model particles after traveling a certain distance. We explore the reach for long-lived singlet scalars at the {\unit[13]{TeV}} Large Hadron Collider with $\mathcal{L}=\text{unit}[139]f{b}^{-1}$ and show its impact on the parameter space of the model. Setting aside currently unresolved theoretical uncertainties, we estimate the gravitational wave signatures detectable at future observatories.

   hep-phJHEP(2023)·18 citations
4. 04*

   Lepton masses in a non universal U(1) model with three families

   C. Cortes-Parra🇨🇴 · R. Martinez🇨🇴 · J. S. Alvarado🇨🇴

   We present an extension $U(1{)}_X$ to the Standard Model that reproduces the lepton mass structures determined by the experiments. In the charged sector, we introduced effective operators of dimension $n=7$ to generate the mass of the electron, which is null at tree-level due to the $X$ charge. In the neutral sector, we added three sterile right-handed neutrinos and three Majorana neutrinos to generate the mass structure for the left-handed neutrinos, by the inverse seesaw mechanism. The model free parameters were fitted with the known mass eigenvalues $m_e,m_{\mu },m_{\tau }$, and with the most recent results of a global analysis of the data from neutrino oscillation. From the adjustment of the free parameters, we obtained allowed regions for the Yukawa coupling set.

   hep-ph0 citations
5. 05*

   Strange partners of the doubly charmed tetraquark $T_{cc}^{+}$

   S. S. Agaev🇦🇿 · K. Azizi🇮🇷 · H. Sundu🇹🇷

   The spectroscopic parameters and widths of the axial-vector $T_{cc:s}^{\mathrm{AV}}$ and scalar $T_{cc:s}^{\mathrm{S}}$, ${\tilde{T}}_{cc:s}^{\mathrm{S}}$ strange partners of the doubly charmed exotic meson $T_{cc}^{+}$ with the content $cc\overline{u}\overline{s}$, are calculated in the framework of the QCD sum rule method. We model $T_{cc:s}^{\mathrm{AV}}$ as the diquark-antidiquark state composed of axial-vector and scalar components, whereas scalar particles $T_{cc:s}^{\mathrm{S}}$ and ${\tilde{T}}_{cc:s}^{\mathrm{S}}$ are built of axial-vector and scalar diquarks, respectively. The masses and current couplings of these tetraquarks are calculated in the context of the two-point sum rule approach by taking into account the quark, gluon and mixed condensates up to dimension $10$. The full width of the state $T_{cc:s}^{\mathrm{AV}}$ is found from analysis of the processes $T_{cc:s}^{\mathrm{AV}}\to D^0{D}_s^{\ast +}$ and $T_{cc:s}^{\mathrm{AV}}\to D^{\ast }(2007{)}^0{D}_s^{+}$. Decays to $D^0{D}_s^{+}$, $D^{\ast }(2007{)}^0{D}_s^{\ast +}$ and $D^0{D}_s^{+}$ mesons are utilized in the case of the scalar tetraquarks $T_{cc:s}^{\mathrm{S}}$ and ${\tilde{T}}_{cc:s}^{\mathrm{S}}$, respectively. The partial widths of the aforementioned decays are determined via the strong couplings $g_1$, $g_2$, $G_1$, $G_2$ and $\tilde{G}$, which describe the strong interactions of the particles at the relevant tetraquark-meson-meson vertices. These couplings are computed using the QCD three-point sum rule method, most appropriate for the strong decays under study. ....

   hep-phhep-exhep-latEur.Phys.J.Plus(2023)·4 citations
6. 06*

   Five loop minimal MOM scheme field and quark mass anomalous dimensions in QCD

   J.A. Gracey🇬🇧 · R.H. Mason🇬🇧

   We determine the anomalous dimensions of the gluon, Faddeev-Popov ghost and quark in the minimal MOM scheme to five loops for a general colour group when Quantum Chromodynamics is fixed in a linear covariant gauge. The quark mass anomalous dimension is also constructed in the same scheme.

   hep-phJ.Phys.A(2023)·10 citations
7. 07*

   Stau searches and measurements with the ILD concept at the International Linear Collider

   M.T. Núñez Pardo de Vera🇩🇪 · M. Berggren🇩🇪 · J. List🇩🇪

   One of the most interesting channels to search for SUSY is the direct pair-production of the $\tau$-lepton superpartner, $\tilde{\tau }$. The $\tilde{\tau }$ is with high probability the lightest of the scalar leptons, so one of the first SUSY particles that can be observerd, and the signature of $\tilde{\tau }$ pair production signal events is one of the most difficult ones, yielding to the ``worst'' and so most global scenario for the searches. Analysis performed at LEP set the current model-independent $\tilde{\tau }$ limits, suffering from the low energy of this facility. Only under strong model assumptions, these limits are extended to higher masses by LHC studies. In this contribution we show the capability of the ILC, a future electron-positron collider with energy up to 1 TeV, for determining $\tilde{\tau }$ exclusion/discovery limits in a model-independent way, including an overview of the current state-of-the-art. The determination of the ``worst'' scenario for $\tilde{\tau }$ exclusion/discovery, taking into account the effect of the $\tilde{\tau }$ mixing on $\tilde{\tau }$ production cross-section and efficiency, is also presented. For selected benchmarks, the prospect for measuring masses and polarised cross-sections will be shown. The studies were done studying events passed through the full detector simulation and reconstruction procedures of the International Large Detector (ILD) concept at the ILC. The simulation included all SM backgrounds, as well as the machine induced ones.

   hep-phPoS(2022)·1 citation
8. 08*

   Integrating out heavy scalars with modified EOMs: matching computation of dimension-eight SMEFT coefficients

   Upalaparna Banerjee🇮🇳 · Joydeep Chakrabortty🇮🇳 · Christoph Englert🇬🇧 · Shakeel Ur Rahaman🇮🇳 · Michael Spannowsky🇬🇧

   The shift in focus towards searches for physics beyond the Standard Model (SM) employing model-independent Effective Field Theory (EFT) methods necessitates a rigorous approach to matching to guarantee the validity of the obtained results and constraints. The limits on the leading dimension-six EFT effects can be rather inaccurate for LHC searches that suffer from large uncertainties while exploring an extensive energy range. Similarly, precise measurements can, in principle, test the subleading effects of the operator expansion. In this work, we present an algorithmic approach to automatise matching computations for dimension-eight operators for generic scalar extensions with proper implementation of equations of motion. We devise a step-by-step procedure to obtain the dimension-eight Wilson coefficients (WCs) in a non-redundant basis to arrive at complete matching results. We apply this formalism to a range of scalar extensions of the SM and provide tree-level and loop-suppressed results. Finally, we discuss the relevance of the dimension-eight operators for a range of phenomenological analyses, particularly focusing on Higgs and electroweak physics.

   hep-phPRD(2023)·21 citations
9. 09*

   All-optical nonlinear Breit-Wheeler pair production with $\gamma$-flash photons

   Alexander J. MacLeod🇨🇿 · Prokopis Hadjisolomou🇨🇿 · Tae Moon Jeong🇨🇿 · Sergei V. Bulanov🇨🇿

   High-power laser facilities give experimental access to fundamental strong-field quantum electrodynamics processes. A key effect to be explored is the nonlinear Breit-Wheeler process: the conversion of high-energy photons into electron-positron pairs through the interaction with a strong electromagnetic field. A major challenge to observing nonlinear Breit-Wheeler pair production experimentally is first having a suitable source of high-energy photons. In this paper we outline a simple all-optical setup which efficiently generates photons through the so-called $\gamma$-flash mechanism by irradiating a solid target with a high-power laser. We consider the collision of these photons with a secondary laser, and systematically discuss the prospects for exploring the nonlinear Breit-Wheeler process at current and next-generation high-power laser facilities.

   hep-phphysics.plasm-phPRA(2023)·23 citations
10. 10*

    Deciphering the phases of QCD matter with fluctuations and correlations of conserved charges

    Anar Rustamov🇩🇪

    A review is given on recent experimental and theoretical/phenomenological developments regarding the phase structure of the strongly interacting matter. Specifically, evolution with the collision energy of net-proton number fluctuations as measured by several experiments are presented and their implications for the QCD phase diagram are outlined. In addition, theoretical calculations on correlations between conserved charges are presented and prospects for their experimental explorations are addressed.

    hep-phnucl-exEPJ Web Conf.(2023)·14 citations
11. 11*

    Neutrino masses and self-interacting dark matter with mass mixing $Z-Z^{\prime }$ gauge portal

    Leon M.G. de la Vega🇲🇽 · Eduardo Peinado🇲🇽 · Jose Wudka🇺🇸

    New light gauge bosons can affect several low-energy experiments, such as atomic parity violation or colliders. Here, we explore the possibility that a dark sector is charged under a new $U(1)$ gauge symmetry, and the portal to the Standard Model is through a $Z-Z^{\prime }$ mass mixing. In our approach, breaking the new gauge symmetry is crucial to generate neutrino masses. We investigate the parameter space to reproduce neutrino masses, the correct dark matter relic abundance, and to produce the observed core-like DM distribution in galactic centers.

    hep-phJHEP(2023)·6 citations
12. 12*

    EXCEED-DM: Extended Calculation of Electronic Excitations for Direct Detection of Dark Matter

    Tanner Trickle🇺🇸

    Direct detection experiments utilizing electronic excitations are spearheading the search for light, sub-GeV, dark matter (DM). It is thus crucial to have accurate predictions for any DM-electron interaction rate in this regime. EXCEED-DM (EXtended Calculation of Electronic Excitations for Direct detection of Dark Matter) computes DM-electron interaction rates with inputs from a variety of ab initio electronic structure calculations. The purpose of this manuscript is two-fold: to familiarize the user with the formalism and inputs of EXCEED-DM, and perform novel calculations to showcase what EXCEED-DM is capable of. We perform four calculations which extend previous results: the scattering rate in the dark photon model, screened with the numerically computed dielectric function, the scattering rate with an interaction potential dependent on the electron velocity, an extended absorption calculation for scalar, pseudoscalar, and vector DM, and the annual modulation of the scattering rate in the dark photon model.

    hep-phastro-ph.COcond-mat.mtrl-sciPRD(2023)·39 citations
13. 13*

    Resonant anomaly detection without background sculpting

    Anna Hallin🇺🇸 · Gregor Kasieczka🇩🇪 · Tobias Quadfasel🇩🇪 · David Shih🇺🇸 · Manuel Sommerhalder🇩🇪

    We introduce a new technique named Latent CATHODE (LaCATHODE) for performing "enhanced bump hunts", a type of resonant anomaly search that combines conventional one-dimensional bump hunts with a model-agnostic anomaly score in an auxiliary feature space where potential signals could also be localized. The main advantage of LaCATHODE over existing methods is that it provides an anomaly score that is well behaved when evaluating it beyond the signal region, which is essential to prevent the sculpting of background distributions in the bump hunt. LaCATHODE accomplishes this by constructing the anomaly score directly in the latent space learned by a conditional normalizing flow trained on sideband regions. We demonstrate the superior stability and comparable performance of LaCATHODE for enhanced bump hunting in an illustrative toy example as well as on the LHC Olympics R&D dataset.

    hep-phhep-exphysics.data-anPRD(2023)·66 citations
14. 14*

    $CP$ violation in ${\eta }^{(\prime )}\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ decays

    Maximilian Zillinger🇩🇪 · Bastian Kubis🇩🇪 · Pablo Sánchez-Puertas🇪🇸

    It has been pointed out recently that a certain set of dimension-6 scalar $P$- and $CP$-violating light-quark-muon operators may be tested in $\eta$ and ${\eta }^{\prime }$ decays to various final states involving ${\mu }^{+}{\mu }^{-}$ pairs, at a level not yet excluded by constraints from electric dipole moments. We here work out the hadronic matrix elements required for the predictions for the decays $\eta ,{\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$. We relate a new asymmetry in the angular distribution between the dipion and dimuon decay planes to the corresponding Wilson coefficients. Despite the advantage of not requiring the measurement of muon polarization, the projected sensitivities are shown to be moderate due to a combination of small phase space and chiral suppression. Such sensitivity studies are most timely in view of upcoming or planned high-statistics ${\eta }^{(\prime )}$ experiments such as the JLab eta factory or REDTOP.

    hep-phhep-exnucl-thJHEP(2022)·13 citations
15. 15*

    Investigating Higgs self-interaction through di-Higgs plus jet production

    Kangyu Chai🇨🇳 · Jiang-Hao Yu🇨🇳 · Hao Zhang🇨🇳

    The Higgs self coupling measurement is quite essential for determining the shape of the Higgs potential and nature of the Higgs boson. We propose the di-Higgs plus jet final states at hadron colliders to increase the discovery sensitivity of the Higgs self coupling at the low invariant mass region. Our simulation indicates that the allowed region of the Higgs self coupling would be further narrowed from $[-1.5,6.7]$ from the most recent ATLAS report down to $[0.5,1.7]$. Furthermore, we find negative Higgs self couplings would be disfavored beyond $2\sigma$ confidence level at a future 100TeV collider with the help of this signal.

    hep-phhep-exhep-thPRD(2023)·2 citations
16. 16*

    Complete NNLO Operator Bases in Higgs Effective Field Theory

    Hao Sun🇨🇳 · Ming-Lei Xiao🇺🇸 · Jiang-Hao Yu🇨🇳

    For the first time, we list the complete and independent set of operators at the next-to-next-to-leading order (NNLO) in the Higgs effective field theory (HEFT), also named as the electroweak chiral Lagrangian with the light Higgs boson. The Young tensor technique utilized in this work guarantees the completeness and independence of the on-shell amplitude basis while the Adler zero condition imposes non-linear symmetry on the Nambu-Goldstone bosons that play the central role in the chiral Lagrangian. The spurion fields are incorporated into the gauge structure of operators following the Littlewood-Richardson rule to accommodate custodial symmetry breaking. We enumerate 11506 (1927574) NNLO operators for one (three) flavor of fermions for the electroweak chiral Lagrangian with the light Higgs. Below the electroweak symmetry breaking scale, the dimension-8 standard model effective field theory (SMEFT) operators could be matched to these HEFT operators at both the NLO and NNLO orders.

    hep-phhep-thJHEP(2023)·34 citations
17. 17*

    How can we explain last UHERC anisotropies?

    D. Fargion🇮🇹 · P.G. De Sanctis Lucentini🇷🇺 · M.Y. Khlopov🇷🇺

    We consider the recent results on UHECR (Ultra High Energy Cosmic Ray), clustering, composition, distribution in the sky, from the energy of several EeV with the dipole anisotropy up to the highest ones. We have suggested since 2008 and we reconfirm here that UHECR at 40 up to 70 EeV are mostly made by light and lightest nuclei. The remarkable Virgo absence and the few localized nearby extragalactic sources as CenA, NG 253, M82 may be well understood by the lightest nuclei fragility and opacity within Mpc distances. We comment also on the role of a few galactic UHECR sources at ten EeV that may be partially feeding the Auger dipole UHECR anisotropy. The recent anisotropy in the UHECR spectral composition of lightest and heavy nuclei, outside and along the galactic plane, could also be a first confirmation of our previous claims (2012). The interplay of the heavier and most energetic UHECR galactic nuclei with the mainly local (Mpcs) extragalactic signals ruled by lightest nuclei, seems to fit the main pieces of UHECR puzzle.

    ↳ astro-ph.HEastro-ph.COhep-ph0 citations
18. 18*

    Bump of sound velocity in dense 2-color QCD

    Etsuko Itou🇯🇵 · Kei Iida🇯🇵

    We obtain the equation of state (EoS) and the sound velocity for 2-color QCD at low temperature and high density and find that in the superfluid phase, $c_s^2/c^2>1/3$, where $1/3$ is the value at the relativistic limit. Several independent Monte Carlo studies on 2-color QCD have been conducted intensively in recent years. These works have shown a clear evidence of phase transition between hadronic and superfluid phases. In our paper[1], we have investigated the EoS and sound velocity in both phases. Our result is consistent with chiral perturbation theory in a low $\mu$ regime of the superfluid phase including the Bose-Einstein condensed phase, and shows a peak of sound velocity in the high-density BCS phase. We also give detailed simulation results and a comment on the holography bound in this proceedings.

    ↳ hep-lathep-phnucl-thPoS(2023)·7 citations
19. 19*

    Joint photon-electron Lorentz violation parameter plane from LHAASO data

    Ping He🇨🇳 · Bo-Qiang Ma🇨🇳

    The Large High Altitude Air Shower Observatory~(LHAASO) is one of the most sensitive gamma-ray detector arrays, whose ultrahigh-energy~(UHE) work bands not only help to study the origin and acceleration mechanism of UHE cosmic rays, but also provide the opportunity to test fundamental physics concepts such as Lorentz symmetry. LHAASO directly observes the $1.42\mathrm{PeV}$ highest-energy photon. By adopting the synchrotion self-Compton model, LHAASO also suggests that the $1.12\mathrm{PeV}$ high-energy photon from Crab Nebula corresponds to a $2.3\mathrm{PeV}$ high-energy electron. We study the $1.42\mathrm{PeV}$ photon decay and the $2.3\mathrm{PeV}$ electron decay to perform a joint analysis on photon and electron two-dimensional Lorentz violation~(LV) parameter plane. Our analysis is systematic and comprehensive, and we naturally get the strictest constraints from merely considering photon LV effect in photon decay and electron LV effect in electron decay. Our result also permits the parameter space for new physics beyond relativity.

    ↳ astro-ph.HEgr-qchep-phPLB(2022)·9 citations
20. 20*

    Cosmological inference from the EFTofLSS: the eBOSS QSO full-shape analysis

    Théo Simon🇫🇷 · Pierre Zhang🇨🇳 · Vivian Poulin🇫🇷

    We present cosmological results inferred from the effective-field theory (EFT) analysis of the full-shape of eBOSS quasars (QSO) power spectrum. We validate our analysis pipeline against simulations, and find overall good agreement between the analyses in Fourier and configuration space. Keeping the baryon abundance and the spectral tilt fixed, we reconstruct at $68\%$ CL the fractional matter abundance ${\Omega }_m$, the reduced Hubble constant $h$, and the clustering amplitude ${\sigma }_8$, to respectively ${\Omega }_m=0.327\pm 0.035$, $h=0.655\pm 0.034$, and ${\sigma }_8=0.880\pm 0.083$ from eBOSS QSO alone. These constraints are consistent at $\lesssim 1.8\sigma$ with the ones from Planck and from the EFT analysis of BOSS full-shape. Interestingly $S_8$ reconstructed from eBOSS QSO is slightly higher than that deduced from Planck and BOSS, although statistically consistent. In combination with the EFT likelihood of BOSS, supernovae from Pantheon, and BAO from lyman-$\alpha$ and 6dF/MGS, constraints improve to ${\Omega }_m=0.2985\pm 0.0069$ and $h=0.6803\pm 0.0075$, in agreement with Planck and with similar precision. We also explore one-parameter extensions to $\Lambda$CDM and find that results are consistent with flat $\Lambda$CDM at $\lesssim 1.3\sigma$. We obtain competitive constraints on the curvature density fraction ${\Omega }_k=-0.039\pm 0.029$, the dark energy equation of state $w_0=-1.038\pm 0.041$, the effective number of relativistic species $N_{\mathrm{eff}}=3.44_{-0.91}^{+0.44}$ at $68\%$ CL, and the sum of neutrino masses $\sum m_{\nu }<0.274e$V at $95\%$ CL, without Planck data. Including Planck data, contraints significantly improve thanks to the large lever arm in redshift between LSS and CMB measurements. In particular, we obtain the stringent constraint $\sum m_{\nu }<0.093e$V, competitive with recent lyman-$\alpha$ forest power spectrum bound.

    ↳ astro-ph.COhep-phhep-thJCAP(2023)·57 citations
21. 21*

    Solvable potentials in a FLRW+Scalar universe and Fits to type Ia supernovae data

    B. S. Balakrishna

    FLRW equations are analyzed in a universe with a cosmic scalar background that is spatially uniform but time-varying. Some solvable potentials to the combined dynamics in such a universe are presented, that are consistent with the scalar dynamics as a consequence of energy momentum conservation. Certain potentials are found to provide very good fits to type Ia supernovae data, with the kinetic and potential energies of the scalar providing the source for dark matter and dark energy. The scalar rolls down the potential as the universe expands with the potential playing the role of a time-varying cosmological constant, modeling a scenario recently discussed in the literature.

    ↳ gr-qcastro-ph.COhep-phhep-th1 citation
22. 22*

    Counting operators in Effective Field Theories

    Jonáš Dujava🇨🇿

    We systematically develop the Hilbert series technique for counting independent operators in Effective Field Theories. In the hope of providing more approachable entry point to the subject we include a detailed introduction of all necessary group theoretic tools (in a rather mathematical definition-theorem-proof style). Finally, we apply the formalism in the case of a single scalar field and also electromagnetic field, partly reproducing and partly extending known results.

    ↳ hep-thhep-phmath-phmath.MP2 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.