Thu·Jan 19, 2023Thursday·January 19, 2023

1. 01*

   Renormalisation of SMEFT bosonic interactions up to dimension eight by LNV operators

   Supratim Das Bakshi🇪🇸 · Álvaro Díaz-Carmona🇪🇸

   We present the renormalisation group running of the bosonic operators of the Standard Model effective field theory by the Lepton Number Violating operators (LNVs) at 1-loop order up to $\mathcal{O}(v^4/{\Lambda }^4)$, with $v\sim 246$ GeV as the electroweak scale and $\Lambda$ as the SMEFT cut-off. Using these relations with the positivity bounds on Wilson coefficients of ${\varphi }^4{D}^4$ class, we derive sign-constraints on the Wilson coefficients of LNV operators for models where ${\varphi }^4{D}^4$ operators do not appear at tree-level. We inspect these constraints for the LNV Wilson coefficients generated from matching the Type-I and III seesaw models to SMEFT up to dimension seven at tree-level. We also exhibit the unique bounds induced by the T-parameter on LNVs.

   hep-phhep-thJHEP(2023)·29 citations
2. 02*

   Computer package DIZET v. 6.45

   A. Arbuzov🇷🇺 · J. Gluza🇵🇱 · L. Kalinovskaya🇷🇺 · S. Riemann🇩🇪 · T. Riemann🇩🇪 · V. Yermolchyk🇷🇺

   The new version of the DIZET electroweak library is described. Changes and additional code features concerning the previous version are explained. The software allows one to make state-of-the-art theoretical predictions for pseudo-observable quantities, including higher-order radiative corrections. The current version of the DIZET library v. 6.45 incorporates advanced recent results of theoretical calculations. Numerical comparisons with the results of the previous version are performed. Estimates of theoretical uncertainties are discussed.

   hep-phComput.Phys.Commun.(2023)·7 citations
3. 03*

   Revealing the origin of neutrino masses through the Type II Seesaw mechanism at high-energy muon colliders

   Tong Li🇨🇳 · Chang-Yuan Yao🇨🇳 · Man Yuan🇨🇳

   The future muon collider can play as an ideal machine to search for new physics at high energies. In this work, we study the search potential of the heavy Higgs triplet in the Type II Seesaw mechanism at muon colliders with high collision energy and high luminosity. The latest neutrino oscillation data are taken into account for realizing the leptonic decay modes of the charged Higgs bosons $(H^{\pm \pm },H^{\pm })$ in the Type II Seesaw. We show the impact of neutrino mass and mixing parameters on the purely leptonic decays. The pair production of doubly charged Higgs $H^{++}{H}^{--}$ is through direct ${\mu }^{+}{\mu }^{-}$ annihilation and vector boson fusion (VBF) processes at muon collider. The associated production $H^{\pm \pm }{H}^{\mp }$ can only be induced by VBF processes. We simulate both the purely leptonic and bosonic signal channels of charged Higgs bosons in Type II Seesaw, together with the Standard Model backgrounds. We show the required luminosity for the discovery of the charged Higgses and the reachable limits on the leptonic decay branching fractions.

   hep-phJHEP(2023)·24 citations
4. 04*

   Core-corona approach to describe hyperon global polarization in semi-central relativistic heavy-ion collisions

   Alejandro Ayala🇲🇽 · Isabel Domínguez🇲🇽 · Ivonne Maldonado🇷🇺 · María Elena Tejeda-Yeomans🇲🇽

   We report on the core-corona model developed to describe the main features of hyperon global polarization in semicentral relativistic heavy-ion collisions as a function of the collision energy. We first neglect the contribution to polarization from hyperons produced in the corona. In this scenario, the global polarization turns out to be described by a delicate balance between the vorticity-to-spin transferring reactions in the core and the predominance of corona over core matter at low energies. We show how this last feature provides a key ingredient missing in our original model that helps to better describe the excitation function for $\Lambda$ and $\overline{\Lambda }$ global polarization. To improve the description, we then introduce the contribution to the global polarization coming from the transverse polarization of $\Lambda$s produced in the corona, which is hereby assumed to be similar to the well-known polarization produced in p + p reactions. The results show a small positive contribution to the global polarization, however they are not yet conclusive due to the small size of the MC sample used in the analysis.

   hep-phnucl-thRev.Mex.Fis.Suppl.(2023)·1 citation
5. 05*

   Production of $X_b$ via ${\rm Y}(5S,6S)$ radiative decays

   Xiao-Yun Wang🇨🇳 · Zu-Xin Cai🇨🇳 · Gang Li🇨🇳 · Shi-Dong Liu🇨🇳 · Chun-Sheng An🇨🇳 · Ju-Jun Xie🇨🇳

   We investigate the production of $X_b$ in the process ${\rm Y}(5S,6S)\to \gamma X_b$, where $X_b$ is assumed to be a $B{\bar{B}}^{\ast }$ molecular state. Two kinds of meson loops of $B^{(\ast )}{\bar{B}}^{(\ast )}$ and $B_1^{\prime }{\bar{B}}^{(\ast )}$ were considered. To explore the rescattering mechanism, we calculated the relevant branching ratios using the effective Lagrangian based on the heavy quark symmetry. The branching ratios for the ${\rm Y}(5S,6S)\to \gamma X_b$ were found to be at the orders of $10^{-7}\sim 10^{-6}$. Such sizeable branching ratios might be accessible at BelleII, which would provide important clues to the inner structures of the exotic state $X_b$.

   hep-phEPJC(2023)·7 citations
6. 06*

   Predictions of super-exotic heavy mesons from $K^{\ast }{B}^{\ast }{B}^{\ast }$ interactions

   M. Bayar🇹🇷 · N. Ikeno🇯🇵 · L. Roca🇪🇸

   We make a theoretical study of the three-body system composed of ${\bar{K}}^{\ast }{\bar{B}}^{\ast }{\bar{B}}^{\ast }$ to look for possible bound states, which could be associated to mesonic resonances of very exotic nature, containing open strange and double-bottom flavours. The three-body interaction is evaluated by using the fixed center approach to the Faddeev equations where the ${\bar{B}}^{\ast }{\bar{B}}^{\ast }$ is bound forming an $I(J^P)=0(1^{+})$ state, as it was found in previous works, and the third particle, the ${\bar{B}}^{\ast }$, of much smaller mass, interacts with the components of the cluster. We obtain bound states for all the channels considered: spin $J=0$, 1 and 2, all of them with isospin $I=1/2$ and negative parity.

   hep-phPRD(2023)·7 citations
7. 07*

   Quark masses and CKM hierarchies from $S_4^{\prime }$ modular flavor symmetry

   Yoshihiko Abe🇺🇸 · Tetsutaro Higaki🇯🇵 · Junichiro Kawamura🇰🇷 · Tatsuo Kobayashi🇯🇵

   We propose models to explain the hierarchies of the quark masses and mixing by utilizing the $S_4^{\prime }$ modular flavor symmetry. The hierarchy is realized by the modulus $\tau$ stabilized at $\mathrm{Im}\tau \gg 1$, where the residual $Z_4^T$ symmetry is approximately unbroken and the Froggatt-Nielsen mechanism works. It is found that the quark hierarchies are realized only in a few cases of quark representations. We study two models with assigning the modular weights, so that the observed quark hierarchies are explained in the cases of both small and large ratios of the top to bottom Yukawa couplings. We also argue that $\mathcal{O}(0.1)$ hierarchies of the $\mathcal{O}(1)$ coefficients can be explained by imposing another $S_3$ modular symmetry.

   hep-phEPJC(2023)·43 citations
8. 08*

   Isospin sum rules in charmed baryon weak decays

   Jin-Feng Luo🇨🇳 · Di Wang🇨🇳

   Isospin symmetry is the most precise flavor symmetry. The effective Hamiltonian of charm quark weak decay is zero under the isospin lowering operators $I_{-}^n$, which permits us to generate isospin sum rules through several master formulas. In this work, we derive the master formulas of isospin sum rules for the two- and three-body non-leptonic decays of singly and doubly charmed baryons. Hundreds of isospin sum rules are derived to test of isospin symmetry and provide hints for the new decay modes. The isospin sum rules for multi-body decays are not broken by the intermediate resonances and hence can be used to study the isospin partners of exotic hadrons.

   hep-phEPJC(2024)·10 citations
9. 09*

   Parametric resonance in abelian and non-abelian gauge fields via space-time oscillations

   Shreyansh S. Dave🇮🇳 · Sanatan Digal🇮🇳 · Vinod Mamale🇮🇳

   We study the evolution of abelian $U(1)$ electromagnetic as well as non-abelian $SU(2)$ gauge fields, in the presence of space-time oscillations. Analysis of the time evolution of abelian gauge fields shows the presence of parametric resonance in spatial modes. A similar analysis in the case of non-abelian gauge fields, in the linear approximation, shows the presence of the same resonant spatial modes. The resonant modes induce large fluctuations in physical observables including those that break the $CP-$symmetry. We also carry out time evolution of small random fluctuations of the gauge fields, using numerical simulations in $2+1$ and $3+1$ dimensions. These simulations help to study non-linear effects in the case of non-abelian gauge theories. Our results show that there is an increase in energy density with the coupling, at late times. These results suggest that gravitational waves may excite non-abelian gauge fields more efficiently than electromagnetic fields. Also, gravitational waves in the early Universe and from the merger of neutron stars, black holes etc. may enhance $CP-$violation and generate an imbalance in chiral charge distributions, magnetic fields etc.

   hep-phastro-ph.HEgr-qchep-thPRD(2024)·3 citations
10. 10*

    Chiral phonons as dark matter detectors

    Carl P. Romao🇨🇭 · Riccardo Catena🇸🇪 · Nicola A. Spaldin🇨🇭 · Marek Matas🇨🇭

    We propose a method for detecting single chiral phonons that will enable their use as dark-matter detectors. We suggest metal--organic frameworks (MOFs) as detector materials, as their flexibility yields low-energy chiral phonons with measurable magnetic moments, and their anisotropy leads to directional sensitivity, which mitigates background contamination. To demonstrate our proposal, we calculate the phononic structure of the MOF InF${}_3$($4,4^{\prime }$-bipyridine), and show that it has highly chiral acoustic phonons. Detection of such chiral phonons via their magnetic moments would dramatically lower the excitation energy threshold for dark matter detection to the energy of a single phonon. We show that single phonon detection in a MOF would extend detector reach ten or more orders of magnitude below current limits, enabling exploration of a multitude of as-yet-unprobed dark matter candidates.

    hep-phastro-ph.COcond-mat.mtrl-sciPRResearch(2023)·9 citations
11. 11*

    Mixed states for neutral current neutrino oscillation

    M. M. Ettefaghi🇮🇷 · Z. Askaripour Ravari🇮🇷

    The theory of neutrino oscillation predicts that if both neutrino and antineutrino coming from $Z_0$ decay are detected, one can observe an oscillation pattern between the corresponding detectors. This prediction is based on two properties; the neutrino-antineutrino pairs are produced coherently and they are detected with definite flavor in detectors. In this paper, we reanalyze this problem by considering some massive neutrinos which are mixed with light neutrinos but they either participate incoherently or are decoupled in the production and detection processes. In fact, neutrinos whose masses are larger than the upper bound on the mass uncertainty to be compatible with the coherence conditions (we will see it is about 1 keV) must be treated incoherently. Very heavy neutrinos whose masses are much larger than the neutrino energy in the neutrino production process are decoupled. Under these conditions, the created neutrino-antineutrino state as well as the states of detected neutrino and antineutrino is mixed. We see that the oscillation pattern cannot be observed for incoherent neutrinos and the standard oscillation pattern is recovered if the light neutrino masses are ignored in the production and detection processes. Moreover, since the $Z_0$ decay process is performed blindly with respect to flavors, the oscillating contributions in the event rates are independent of the $Z_0$ decay width.

    hep-phquant-phNPB(2023)·0 citations
12. 12*

    Quark-hadron duality at work: lifetimes of bottom baryons

    James Gratrex🇭🇷 · Alexander Lenz🇩🇪 · Blaženka Melić🇭🇷 · Ivan Nišandžić🇭🇷 · Maria Laura Piscopo🇩🇪 · Aleksey V. Rusov🇩🇪

    In the 1990s, very low experimental values for the lifetime ratio $\tau ({\Lambda }_b)/\tau (B_d)$ triggered a considerable amount of doubt in the applicability of the heavy quark expansion (HQE), which is based on the assumption of quark-hadron duality (QHD) for inclusive total decay rates. However, these low values turned out to be the result of purely experimental problems, and the current HFLAV average reads $\tau ({\Lambda }_b)/\tau (B_d)=0.969(6)$. In this work, we present the Standard Model predictions for the $b$-baryon lifetimes within the framework of the HQE. In particular, we include for the first time the contribution of the Darwin term and we update the estimates for the matrix elements of the dimension-six four-quark operators. Within experimental and theoretical uncertainties, we find excellent agreement between the data and the HQE predictions, and thus no indication for any visible violation of QHD. Our numerical results can be summarised by the ratios $\tau ({\Lambda }_b)/\tau (B_d)=0.955(14)$, $\tau ({\Omega }_b^{-})/\tau (B_d)=1.081(42)$, and $\tau ({\Xi }_b^0)/\tau ({\Xi }_b^{-})=0.929(28)$.

    hep-phhep-exJHEP(2023)·19 citations
13. 13*

    Exploring the magnetic dipole moments of $T_{QQ\bar{q}\bar{s}}$ and $T_{QQ\bar{s}\bar{s}}$ states in the framework of QCD light-cone sum rules

    K. Azizi🇮🇷 · U. Özdem🇹🇷

    Motivated by the recent observation of the tetraquark $T_{cc}^{+}$, we investigate the magnetic dipole moments of the possible single and double strange partners, $T_{QQ\bar{q}\bar{s}}$ and $T_{QQ\bar{s}\bar{s}}$, with the spin-parity $J^P=1^{+}$ by means of the QCD light-cone sum rules. To this end, we model these states as diquark-antidiquark states with different organizations and interpolating currents. The results of magnetic dipole moments obtained using different diquark-antidiquark structures differ from each other, considerably. The magnetic dipole moment is the leading-order response of a bound system to a soft external magnetic field. Therefore, it provides an excellent platform for investigation of the inner structures of hadrons governed by the quark-gluon dynamics of QCD.

    hep-phhep-exhep-latJHEP(2023)·19 citations
14. 14*

    Target mass corrections in lepton--nucleus DIS: theory and applications to nuclear PDFs

    R. Ruiz🇵🇱 · K. F. Muzakka🇩🇪 · C. Leger🇫🇷 · P. Risse🇩🇪 · A. Accardi🇺🇸 · P. Duwentäster🇩🇪 · T. J. Hobbs🇺🇸 · T. Ježo🇩🇪 · C. Keppel🇺🇸 · M. Klasen🇩🇪 · K. Kovařík🇩🇪 · A. Kusina🇵🇱 and 5 other authors

    Motivated by the wide range of kinematics covered by current and planned deep-inelastic scattering (DIS) facilities, we revisit the formalism, practical implementation, and numerical impact of target mass corrections (TMCs) for DIS on unpolarized nuclear targets. An important aspect is that we only use nuclear and later partonic degrees of freedom, carefully avoiding a picture of the nucleus in terms of nucleons. After establishing that formulae used for individual nucleon targets $(p,n)$, derived in the Operator Product Expansion (OPE) formalism, are indeed applicable to nuclear targets, we rewrite expressions for nuclear TMCs in terms of \mbox{re-scaled} (or averaged) kinematic variables. As a consequence, we find a representation for nuclear TMCs that is approximately independent of the nuclear target. We go on to construct a single-parameter fit for all nuclear targets that is in good numerical agreement with full computations of TMCs. We discuss in detail qualitative and quantitative differences between nuclear TMCs built in the OPE and the parton model formalisms, as well as give numerical predictions for current and future facilities.

    hep-phhep-exnucl-exnucl-thPPNP(2024)·34 citations
15. 15*

    Dark photon dark matter from an oscillating dilaton

    Peter Adshead🇺🇸 · Kaloian D. Lozanov🇺🇸 · Zachary J. Weiner🇺🇸

    We present a mechanism for generating ultralight dark photon dark matter in the early Universe via a dilatonlike scalar field coupled to the dark photon's kinetic term. Energy is initially stored in the condensate of the dilaton, which resonantly produces dark photons when it begins oscillating in the early Universe. While similar scenarios with axion--dark-photon couplings require large coupling coefficients to fully populate the dark photon, the dilatonic coupling features a unique regime: When the dark photon's mass is half that of the dilaton, dark photons are copiously produced even when the dilaton undergoes small-amplitude oscillations. Scenarios consistent with the cosmic microwave background allow for ultralight vector dark matter with mass as light as $10^{-20}$ eV.

    hep-phastro-ph.COPRD(2023)·37 citations
16. 16*

    Optimal determination of New Physics couplings: A comparative study

    Subhaditya Bhattacharya🇮🇳 · Sahabub Jahedi🇮🇳 · Jose Wudka🇺🇸

    We study the determination of new physics (NP) parameters using the optimal observable technique (OOT) in situations where the standard model (SM) dominates over the NP effects, and when the NP dominates over the SM contribution, using the 2-Higgs doublet model as an illustrative example; for the case of SM domination we extend our results using an effective theory parameterization of NP effects. For the case of SM dominance we concentrate on $t\bar{t}$ production in an $e^{+}{e}^{-}$ collider, while for the case of NP dominance we consider both $t\bar{t}$ production and pair production of charged scalars, also in an $e^{+}{e}^{-}$ collider. We discuss the effects of the efficiency of background reduction, luminosity and beam polarization, and provide a comparison of the optimal uncertainties with those obtained using a standard ${\chi }^2$ analysis of (Monte Carlo generated) collider data.

    hep-phhep-exJHEP(2023)·14 citations
17. 17*

    An Analytic Approach to Light Dark Matter Propagation

    Christopher Cappiello🇨🇦

    If dark matter interacts too strongly with nuclei, it could be slowed to undetectable speeds in Earth's crust or atmosphere before ever reaching a detector. For sub-GeV dark matter, analytic approximations appropriate for heavier dark matter fail, necessitating the use of computationally expensive simulations. We present a new method of modeling attenuation of light dark matter in the Earth, based on the approximation that the scattering is isotropic in the lab frame. We show that this approach agrees well with Monte Carlo results, and can be much faster when the number of scatterings becomes large, as the runtime for Monte Carlo methods increases exponentially with cross section. We use this method to model attenuation for sub-dominant dark matter--that is, particles that make up a small fraction of the dark matter density--and show that previous work on sub-dominant dark matter overestimates the sensitivity of direct detection experiments.

    hep-phastro-ph.COPRL(2023)·27 citations
18. 18*

    Dark Sector Showers in the Lund Jet Plane

    Timothy Cohen🇺🇸 · Jennifer Roloff🇺🇸 · Christiane Scherb🇺🇸

    We investigate the consequences of models where dark sector quarks could be produced at the LHC, which subsequently undergo a dark parton shower, generating jets of dark hadrons that ultimately decay back to Standard Model hadrons. This yields collider objects that can be nearly indistinguishable from Standard Model jets, motivating the reliance on substructure observables to tease out the signal. However, substructure predictions are sensitive to the details of the incalculable dark hadronization. We show that the Lund jet plane provides a very effective tool for designing observables that are resilient against the unknown impact of dark hadronization on the substructure properties of dark sector jets.

    hep-phPRD(2023)·26 citations
19. 19*

    The mass of charged pions in neutron star matter

    Bryce Fore🇺🇸 · Norbert Kaiser🇩🇪 · Sanjay Reddy🇺🇸 · Neill C. Warrington🇺🇸

    We examine the behavior of charged pions in neutron-rich matter using heavy-baryon chiral perturbation theory. This study is motivated by the prospect that pions, or pion-like excitations, may be relevant in neutron-rich matter encountered in core-collapse supernovae and neutron star mergers. We find, as previously expected, that the ${\pi }^{-}$ mass increases with density and precludes s-wave condensation at $n_B\lesssim n_{\text{sat}}$, where $n_{\text{sat}}\simeq 0.16{\text{fm}}^{-3}$ is the nuclear saturation density, and the mass of the ${\pi }^{+}$ mode decreases with density. The uncertainty in these predictions increases rapidly for $n_B\gtrsim n_{\text{sat}}$ because low energy constants associated with the two-pion-two-nucleon operators in chiral perturbation theory are poorly constrained. We find that these uncertainties are especially large in symmetric nuclear matter and should be included in the analysis of pion-nucleus interactions at low energy and pionic atoms. In neutron-rich matter, accounting for the self-energy difference between neutrons and protons related to the nuclear symmetry energy has several effects. It alters the power counting of certain higher-order contributions to the pion self-energy. Previously unimportant but attractive diagrams are enhanced and result in a modest reduction of the pion masses. Furthermore, in the low-wavelength limit, a collective mode with the quantum numbers of the ${\pi }^{+}$ appears.

    ↳ nucl-thastro-ph.HEhep-phPRC(2024)·27 citations
20. 20*

    Three-body coupled channel framework for two-neutron halo nuclei

    Jin-Yi Pang🇨🇳 · Li-Tan Li · Feng-Kun Guo🇨🇳 · Jia-Jun Wu🇨🇳

    We study the Borromean nuclei formed by a core nucleus and two neutrons in a nonrelativistic effective field theory formalism considering both neutron-neutron and neutron-core interactions. We provide formulae of the charge and matter radii, and successfully reproduce the universal relation proposed by Hongo and Son based on the approximation of an infinite neutron-neutron scattering length and neglecting the neutron-core scattering. Once the realistic finite neutron-neutron and neutron-core scattering lengths are used, the charge and matter radii are influenced by the neutron-core channel in a growingly relevant manner. We obtain a relation among the binding energy of the three-body Borromean system, the ratio between charge and matter radii, and the ratio between the neutron-neutron and core-neutron scattering lengths. We find that the two-neutron separation energy for ${}^{22}$C needs to be $\lesssim 2$ keV in order to be consistent with the experimental constraints of the matter radius of ${}^{22}$C and the ${}^{20}\mathrm{C}n$ $S$-wave scattering length.

    ↳ nucl-thhep-phnucl-ex2 citations
21. 21*

    Broken Scale Invariance and the Regularization of a Conformal Sector in Gravity with Wess-Zumino actions

    Claudio Corianò🇮🇹 · Mario Cretì🇮🇹 · Matteo Maria Maglio🇩🇪

    We elaborate on anomaly induced actions of the Wess-Zumino (WZ) form and their relation to the renormalized effective action, which is defined by an ordinary path integral over a conformal sector, in an external gravitational background. In anomaly-induced actions, the issue of scale breaking is usually not addressed, since these actions are obtained only by solving the trace anomaly constraint and are determined by scale invariant functionals. We investigate the changes induced in the structure of such actions once identified in dimensional renormalization (DR) when the $ϵ=d-4\to 0$ limit is accompanied by the dimensional reduction (DRed) of the field dependencies. We show that operatorial nonlocal modifications $(\sim {\square }^{ϵ})$ of the counterterms are unnecessary to justify a scale anomaly. In this case, only the ordinary finite subtractions play a critical role in the determination of the scale breaking. This is illustrated for the WZ form of the effective action and its WZ consistency condition, as seen from a renormalization procedure. Logarithmic corrections from finite subtractions are also illustrated in a pure $d=4$ (cutoff) scheme. The interplay between two renormalization schemes, one based on dimensional regularization (DR) and the second on a cutoff in $d=4$, illustrates the ambiguities of DR in handling the quantum corrections in a curved background. Therefore, using DR in a curved background, the scale and trace anomalies can both be obtained by counterterms that are Weyl invariant only at $d=4$.

    ↳ hep-thhep-phPLB(2023)·1 citation
22. 22*

    Measurement of Differential Distributions of $B\to D^{\ast }\ell {\bar{\nu }}_{\ell }$ and Implications on $|V_{cb}|$

    Belle Collaboration · M. T. Prim · F. Bernlochner · F. Metzner · K. Lieret · T. Kuhr · I. Adachi · H. Aihara · S. Al Said · D. M. Asner · H. Atmacan · V. Aulchenko and 203 other authors

    We present a measurement of the differential shapes of exclusive $B\to D^{\ast }\ell {\bar{\nu }}_{\ell }$ ($B=B^{-},{\bar{B}}^0$ and $\ell =e,\mu$) decays with hadronic tag-side reconstruction for the full Belle data set of $711{\mathrm{fb}}^{-1}$ integrated luminosity. We extract the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parameters and use an external input for the absolute branching fractions to determine the Cabibbo-Kobayashi-Maskawa matrix element and find $|V_{cb}{|}_{\mathrm{CLN}}=(40.1\pm 0.9)\times 10^{-3}$ and $|V_{cb}{|}_{\mathrm{BGL}}=(40.6\pm 0.9)\times 10^{-3}$ with the zero-recoil lattice QCD point $\mathcal{F}(1)=0.906\pm 0.013$. We also perform a study of the impact of preliminary beyond zero-recoil lattice QCD calculations on the $|V_{cb}|$ determinations. Additionally, we present the lepton flavor universality ratio $R_{e\mu }=\mathcal{B}(B\to D^{\ast }e{\bar{\nu }}_e)/\mathcal{B}(B\to D^{\ast }\mu {\bar{\nu }}_{\mu })=0.990\pm 0.021\pm 0.023$, the electron and muon forward-backward asymmetry and their difference $\Delta A_{FB}=0.022\pm 0.026\pm 0.007$, and the electron and muon $D^{\ast }$ longitudinal polarization fraction and their difference $\Delta F_L^{D^{\ast }}=0.034\pm 0.024\pm 0.007$. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

    ↳ hep-exhep-phPRD(2023)·78 citations
23. 23*

    Revisiting the stability of strange-dwarf stars and strange planets

    Victor P. Goncalves🇧🇷 · Jose C. Jimenez🇧🇷 · Lucas Lazzari🇧🇷

    The dynamical stability of strange-dwarf hybrid stars and strange planets, constituted by strange-quark-matter cores and dilute-nuclear-matter crusts, is revisited by analyzing the fundamental mode eigenfrequencies of the radial oscillation equations with boundary conditions for slow (rapid) conversions originating at the density-discontinuous interface characterizing extremely large (small) microscopic timescales compared to the oscillation periods. For the hadronic crust we used an analytic fit of the BPS results matched to the massless MIT bag model. For the rapid case, our calculations indicate that the zero mode is the so-called {\it reaction mode} whose frequency is a complex number, thus ruling out the existence of strange dwarfs (planets) in nature. On the other hand, slow conversions still provide a sizeable stability window which, interestingly, also reproduces the Glendenning-Kettner-Weber results. The robustness of our findings is demonstrated for different transition densities and using an equation of state from perturbative QCD for the ultra-dense core.

    ↳ nucl-thastro-ph.SRhep-phEPJA(2023)·7 citations
24. 24*

    The Scale of Supersymmetry Breaking and the Dark Dimension

    Luis A. Anchordoqui🇺🇸 · Ignatios Antoniadis🇫🇷 · Niccolò Cribiori🇩🇪 · Dieter Lust🇩🇪 · Marco Scalisi🇩🇪

    We argue for a relation between the supersymmetry breaking scale and the measured value of the dark energy density $\Lambda$. We derive it by combining two quantum gravity consistency swampland constraints, which tie the dark energy density $\Lambda$ and the gravitino mass $M_{3/2}$, respectively, to the mass scale of a light Kaluza-Klein tower and, therefore, to the UV cut-off of the effective theory. Whereas the constraint on $\Lambda$ has recently led to the Dark Dimension scenario, with a prediction of a single mesoscopic extra dimension of the micron size, we use the constraint on $M_{3/2}$ to infer the implications of such a scenario for the scale of supersymmetry breaking. We find that a natural scale for supersymmetry signatures is $M=\mathcal{O}\left({\Lambda }^{1/8}\right)=\mathcal{O}(\mathrm{TeV})$. This mass scale is within reach of LHC and of the next generation of hadron colliders. Finally, we discuss possible string theory and effective supergravity realizations of the Dark Dimension scenario with broken supersymmetry.

    ↳ hep-thastro-ph.COhep-phJHEP(2023)·48 citations
25. 25*

    Detection of gravitational waves in circular particle accelerators II. Response analysis and parameter estimation using synthetic data

    Suvrat Rao🇩🇪 · Julia Baumgarten🇩🇪 · Jochen Liske🇩🇪 · Marcus Brüggen🇩🇪

    We simulate the response of a Storage Ring Gravitational-Wave Observatory (SRGO) to astrophysical millihertz (mHz) gravitational waves (GWs), numerically obtaining its sensitivity curve and optimal choices for some controllable experiment parameters. We also generate synthetic noisy GW data and use Markov Chain Monte Carlo (MCMC) methods to perform parameter estimation of the source properties and their degeneracies. We show that a single SRGO could potentially localize the GW source in the sky using Earth's rotation. We also study the source sky localization area, mass and distance estimation errors as functions of noise, data sampling rate, and observing time. Finally, we discuss, along with its implications, the capacity of an SRGO to detect and constrain the parameters of millihertz GW events.

    ↳ gr-qcastro-ph.IMhep-phphysics.acc-ph+1PRD(2024)·3 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.