Fri·Jan 5, 2024Friday·January 5, 2024

1. 01*

   The DIS 1-Jettiness Event Shape at N${}^3$LL+$\mathcal{O}({\alpha }_s^2)$

   Haotian Cao🇨🇳 · Zhong-Bo Kang🇺🇸 · Xiaohui Liu🇨🇳 · Sonny Mantry🇺🇸

   We present results for the ${\tau }_1$ and ${\tau }_{1a}$ 1-Jettiness global event shape distributions, for Deep Inelastic Scattering (DIS), at the N${}^3$LL + $\mathcal{O}({\alpha }_s^2)$ level of accuracy. These event-shape distributions quantify and characterize the pattern of final state radiation in electron-nucleus collisions. They can be used as a probe of nuclear structure functions, nuclear medium effects in jet production, and for a precision extraction of the QCD strong coupling. The results presented here, along with the corresponding numerical codes, can be used for analyses with HERA data, in EIC simulation studies, and for eventual comparison with real EIC data.

   hep-phhep-exnucl-thPRD(2024)·15 citations
2. 02*

   Feasibility of measuring non-analytic QED coupling from pair creation in strong fields

   B. King🇬🇧 · S. Tang🇨🇳

   In the quasistatic regimes of nonlinear Breit-Wheeler and trident pair creation, the rates can exhibit a non-analytic dependency on the fundamental coupling of quantum electrodynamics (QED), in a form similar to Schwinger vacuum pair creation. To reach this tunneling regime requires satisfying competing requirements: high intensity but low strong-field parameter with sufficient pair creation to be observed. Using a locally monochromatic approach, we identify the parameter regime where tunneling pair-creation could be measured for the first time in experiment. Studying several scenarios of collisions with focussed Gaussian pulses, including a bremsstrahlung and an inverse Compton source for nonlinear Breit-Wheeler and a Gaussian electron beam for nonlinear trident, we find the position of the tunneling parameter regime to be well-defined and robust.

   hep-phPRA(2024)·10 citations
3. 03*

   Production of Higgs Boson in ultra-peripheral heavy ion collisions with two-photon processes

   Gongming Yu🇨🇳 · Wenlong Sun🇨🇳

   We calculated the production of the Higgs boson (H) by two-photon interaction with the equivalent photon approximation in nucleus-nucleus collision, proton-nucleus collision, and proton-proton collision. The numerical results show that the experimental study of the Higgs boson in ultra-peripheral collisions is feasible at the energies of the relativistic heavy ion collider (RHIC) and the large hadron collider (LHC).

   hep-ph0 citations
4. 04*

   Spectroscopic study of $D-$ meson in Regge phenomenology

   Juhi Oudichhya🇮🇳 · Ajay Kumar Rai🇮🇳

   In last few years the experimental evidence of charmed mesons is increasing remarkably. In the present work we systematically studied the $D$ meson by employing Regge phenomenology. By assuming the existence of the quasilinear Regge trajectories, several relations between Regge slope, intercept, and meson masses have been extracted. With the aid of these derived relations, Regge parameters are evaluated in both the ($J,M^2$) and ($n,M^2$) planes to obtain the mass spectra of $D$ meson. In the forthcoming years, we believe that more candidates will be reported and our predictions could provide useful information for future experimental evidences.

   hep-phInt.J.Mod.Phys.A(2024)·7 citations
5. 05*

   Non-standard neutrino interactions mediated by a light scalar at DUNE

   Bhaskar Dutta🇺🇸 · Sumit Ghosh🇰🇷 · Kevin J. Kelly🇺🇸 · Tianjun Li🇨🇳 · Adrian Thompson🇺🇸 · Ankur Verma🇺🇸

   We investigate the effect on neutrino oscillations generated by beyond-the-standard-model interactions between neutrinos and matter. Specifically, we focus on scalar-mediated non-standard interactions (NSI) whose impact fundamentally differs from that of vector-mediated NSI. Scalar NSI contribute as corrections to the neutrino mass matrix rather than the matter potential and thereby predict distinct phenomenology from the vector-mediated ones. Similar to vector-type NSI, the presence of scalar-mediated neutrino NSI can influence measurements of oscillation parameters in long-baseline neutrino oscillation experiments, with a notable impact on CP measurement in the case of DUNE. Our study focuses on the effect of scalar NSI on neutrino oscillations, using DUNE as an example. We introduce a model-independent parameterization procedure that enables the examination of the impact of all non-zero scalar NSI parameters simultaneously. Subsequently, we convert DUNE's sensitivity to the NSI parameters into projected sensitivity concerning the parameters of a light scalar model. We compare these results with existing non-oscillation probes. Our findings reveal that the region of the light scalar parameter space sensitive to DUNE is predominantly excluded by non-oscillation probes, except for scenarios with very light mediator mass.

   hep-phJHEP(2024)·19 citations
6. 06*

   Masses and Magnetic Moments of Singly Heavy Pentaquarks

   Ankush Sharma🇮🇳 · Alka Upadhyay🇮🇳

   Motivated by the recent discovery of single heavy tetraquark structures, $T_{c\bar{s}0}^a(2900{)}^{++}$ and $T_{c\bar{s}0}^a(2900{)}^0$ by the LHCb collaboration, masses and magnetic moments of singly heavy pentaquark states are estimated in this work. To classify the singly heavy pentaquark structures, we employ the special unitary representation. By using the SU(3) flavor representation, we placed singly heavy pentaquark states into the allowed flavor multiples. Also, by using the extension of the Gursey-Radicati mass formula and the effective mass scheme, we estimated the masses of singly heavy pentaquark states. Further, magnetic moments of these states have been calculated using the effective mass and the screened charge techniques. A thorough comparison of our results shows reasonable agreement with the available theoretical data and may be helpful for future experimental studies.

   hep-phFew Body Syst.(2025)·15 citations
7. 07*

   Supersymmetric Hybrid Inflation in Light of CMB Experiments and Swampland Conjectures

   Waqas Ahmed🇨🇳 · Shabbar Raza🇵🇰

   This study revisits supersymmetric (SUSY) hybrid inflation in light of CMB experiments and swampland conjectures. We first show that if one adds radiative, soft mass, and SUGRA corrections to the scalar potential, supersymmetric hybrid inflation is still consistent with Planck 2018 despite an impression that it does not. Usually, in SUSY hybrid inflation with minimal Kähler potential, the gauge symmetry breaking scale $M$ turns out to be $\mathcal{O}(10^{15})$ GeV, which causes proton decay rate problem. In this study, we present a new parameter space where the proton decay rate problem can be avoided by achieving $M$ of the order of $10^{16}$ GeV with $M_S^2<$0 and $a{m}_{3/2}>$0. In this scenario, one requires a soft SUSY breaking scale $|M_S|\gtrsim 10^6$ GeV. Moreover, the tensor to scalar ratio $r$ is in the range $10^{-16}$ to $10^{-6}$, which is quite small. In this case, modified swampland hold, but it is difficult to satisfy trans-Planckian censorship conjecture. For this reason, we also consider non-minimal Kähler potential. We fixed spectral index $n_S=$0.9665 (central value) of Planck 2018 data and $M=2\times 10^{16}$ GeV and present our calculations. We show the canonical measure of primordial gravity waves $r$ for $M_S=$ 1 TeV, $m_{3/2}=$ 1 TeV, ${\kappa }_S<0$ for $\mathcal{N}=$1 and $\mathcal{N}=$2, ranges from $10^{-5}$ to $0.01$ which can be observed in Planck and next-generation experiments such as LiteBIRD, Simons Observatory, PRISM, PIXIE,CORE, CMB-S4 and CMB-HD experiments that are gearing up to measure it. In addition to it, we present the parametric space and benchmark points for a non-minimal case which is consistent with modified swampland and trans-Planckian censorship conjectures.

   hep-phgr-qcCPC(2025)·6 citations
8. 08*

   Pseudo Nambu-Goldstone Boson DM with Linear Symmetry Breaking: Revisited

   Jongkuk Kim🇰🇷 · P. Ko🇰🇷

   In this work, we revisit pseudo Nambu Goldstone boson (pNGB) DM model where global $U(1)$ dark symmetry is spontaneously broken as well as explicitly with broken by with linear symmetry breaking, focusing on the dark matter mass range in $500\mathrm{GeV}\lesssim m_{\mathrm{DM}}\lesssim O(10)$ TeV. This model is interesting not only in its own in the context of pNGB DM, but also in the context of cosmological collider signatures from heavy particle mass regime without Boltzmann suppressions, $H\lesssim m_{\mathrm{heavy}}\lesssim 60H$, through the chemical potential type interaction. After imposing perturbative unitarity, perturbativity, correct thermal relic density and constraints from colliders and (in)direct detection experiments, we find that pNGB DM mass is allowed up to $\sim 1(10)$ TeV for the dark Higgs mass $m_{H_2}=1(100)$ TeV for the Higgs-dark Higgs mixing $\sin \theta =0.1$. We also consider the case where global $U(1)$ dark symmetry is not spontaneously broken, where DM is no longer pNGB. In this case, DM and dark Higgs masses are nearly degenerate in the range of a few TeV $\lesssim m_{\mathrm{DM},H_2}\lesssim \sim 70$ TeV. Low mass region for pNGB DM and $H_2$ could be directly probed in colliders or indirect DM detections, whereas the heavy mass regime could be probed through the non-Gaussianity at the level of $f_{\mathrm{NL}}\sim O(0.01-10)$ if $H$ is as low as $O(1-10)$ TeV.

   hep-ph1 citation
9. 09*

   Probing New Physics in light of recent developments in $b\to c\ell \nu$ transitions

   Tahira Yasmeen🇵🇰 · Ishtiaq Ahmed🇵🇰 · Saba Shafaq🇵🇰 · Muhammad Arslan🇵🇰 · Muhammad Jamil Aslam🇵🇰

   The experimental studies of the observables associated with the $b\to c$ transitions in the semileptonic $B-$ meson decays at BaBar, Belle and LHCb have shown some deviations from the Standard Model (SM) predictions, consequently, providing a handy tool to probe the possible new physics (NP). In this context, we have first revisited the impact of recent measurements of $R(D^{(\ast )})$ and $R({\Lambda }_c)$ on the parametric space of the NP scenarios. In addition, we have included the $R(J/\psi )$ data in the analysis and found that their influence on the best-fit points and the parametric space is mild. Using the recent HFLAV data, after validating the well established sum rule of $R({\Lambda }_c)$, we derived the similar sum rule for $R(J/\psi )$. Furthermore, according to the updated data, we have modified the correlation among the different observables, giving us their interesting interdependence. Finally, to discriminate the various NP scenarios, we have plotted the different angular observables and their ratios for $B\to D^{\ast }\tau {\nu }_{\tau }$ against the transfer momentum square $\left(q^2\right)$, using the $1\sigma$ and $2\sigma$ parametric space of considered NP scenarios. By implementing the collider bounds on NP Wilson coefficients, we find that, in the parametric space of some NP WCs is significantly restrained. To see the clear influence of NP on the amplitude of the angular observables, we have also calculated their numerical values in different $q^2$ bins and shown them through the bar plots. We hope their precise measurements will help to discriminate various NP scenarios.

   hep-phhep-exPTEP(2024)·8 citations
10. 10*

    Updated numerical study of transverse single-spin asymmetries in single-inclusive pion production from lepton-nucleon collisions

    Sophia Fitzgibbons🇺🇸 · Michel Malda🇺🇸 · Jacob Marsh🇺🇸 · Daniel Pitonyak🇺🇸 · Penn Smith🇺🇸

    We revisit the analysis of transverse single-spin asymmetries $A_N$ in lepton-nucleon scattering where only a single pion is detected in the final state, $\ell N^{\uparrow }\to hX$. This observable is the Electron-Ion Collider (EIC) analogue to $A_N$ in proton-proton collisions, $p^{\uparrow }p\to hX$, that has been studied intensely for decades, especially at the Relativistic Heavy Ion Collider (RHIC). We incorporate new theoretical developments in the collinear twist-3 framework and utilize recent extractions of (Sivers-like and Collins-like) quark-gluon-quark correlators in the numerical computations. We compare our calculations to HERMES measurements as well as make predictions for Jefferson Lab, COMPASS, and EIC kinematics. We further explore the role of next-to-leading order (NLO) corrections to the (twist-2) unpolarized cross section (denominator of $A_N$) and consider what can be deduced empirically about the potential numerical significance of the full NLO calculation of $A_N$ in this process. We consider sources of theoretical uncertainty in our predictions, which present potential opportunities then for future measurements to improve our understanding of $A_N$ and multi-parton correlations in hadrons.

    hep-phhep-exnucl-exnucl-thPLB(2024)·5 citations
11. 11*

    A model of pseudo-Nambu-Goldstone dark matter with two complex scalars

    Tomohiro Abe🇯🇵 · Yu Hamada🇩🇪 · Koji Tsumura🇯🇵

    Pseudo-Nambu-Goldstone (pNG) dark matter (DM) is a promising DM candidate and able to explain the measured DM abundance by the thermal freeze-out mechanism evading the stringent bound from DM direct detection experiments. We propose a new model providing a pNG DM by introducing two Standard-Model-singlet complex scalars with the same charges of a dark $U(1)$ gauge symmetry. They are also charged under a $U(1)$ global symmetry corresponding to their relative phase rotations, which is explicitly broken by a soft-breaking term in the scalar potential. The both $U(1)$ symmetries are spontaneously broken by their vacuum expectation values, giving rise to one real pNG boson. We also introduce a discrete ${\mathbb{Z}}_2$ symmetry exchanging the two scalars to stabilize the pNG boson as DM. It is shown that this model reproduces the DM abundance consistently with the current bound from the direct detection experiments. The model has a gauge kinetic mixing between the dark and $U(1{)}_Y$ gauge fields, which allows the dark gauge boson to decay even with a relatively light mass and prevents it from being an additional DM component. The Landau pole is avoided thanks to the small gauge coupling constant. In addition, a DM pair dominantly annihilates into a pair of the dark gauge bosons if the gauge boson mass is lighter than the DM mass, and thus its cross section has significantly different parameter dependence from other pNG DM models. We also calculate the DM-nucleon scattering cross section at the loop level. It turns out that it is necessary to probe region covered by the neutrino fog in order to test this model.

    hep-phJHEP(2024)·6 citations
12. 12*

    From Optimal Observables to Machine Learning: an Effective-Field-Theory Analysis of $e^{+}{e}^{-}\to W^{+}{W}^{-}$ at Future Lepton Colliders

    Shengdu Chai🇨🇳 · Jiayin Gu🇨🇳 · Lingfeng Li🇺🇸

    We apply machine-learning techniques to the effective-field-theory analysis of the $e^{+}{e}^{-}\to W^{+}{W}^{-}$ processes at future lepton colliders, and demonstrate their advantages in comparison with conventional methods, such as optimal observables. Compared to traditional algorithms, we show that simulation-based inference methods are more robust to detector effects and backgrounds, and could in principle produce unbiased results with sufficient Monte Carlo simulation samples that accurately describe experiments. This is crucial for the analyses at future lepton colliders given the outstanding precision of the $e^{+}{e}^{-}\to W^{+}{W}^{-}$ measurement ($\sim 10^{-4}$ in terms of anomalous triple gauge couplings or even better) that can be reached. Our framework can be generalized to other effective-field-theory analyses, such as the one of $e^{+}{e}^{-}\to t\bar{t}$ or similar processes at muon colliders.

    hep-phhep-exJHEP(2024)·15 citations
13. 13*

    Collective neutrino-antineutrino oscillations in dense neutrino environments?

    Damiano F. G. Fiorillo🇩🇰 · Georg G. Raffelt🇩🇪 · Günter Sigl🇩🇪

    The paradigm-changing possibility of collective neutrino-antineutrino oscillations was recently advanced in analogy to collective flavor oscillations. However, the amplitude for the backward scattering process ${\nu }_{{\mathbf{p}}_1}{\overline{\nu }}_{{\mathbf{p}}_2}\to {\nu }_{{\mathbf{p}}_2}{\overline{\nu }}_{{\mathbf{p}}_1}$ is helicity-suppressed and vanishes for massless neutrinos, implying that there is no off-diagonal refractive index between $\nu$ and $\overline{\nu }$ of a single flavor of massless neutrinos. For a nonvanishing mass, collective helicity oscillations are possible, representing de-facto $\nu$--$\overline{\nu }$ oscillations in the Majorana case. However, such phenomena are suppressed by the smallness of neutrino masses as discussed in the previous literature.

    hep-phastro-ph.COastro-ph.HEPRD(2024)·32 citations
14. 14*

    Conserved Currents are Not Anomaly-Safe

    Tyler B. Smith🇺🇸 · Tim M. P. Tait🇺🇸

    New vector bosons that are coupled to conserved currents in the Standard Model exhibit enhanced rates below the electroweak scale from anomalous triangle amplitudes, leading to (energy/vector mass)${}^2$ enhancements to rare Z decays and flavor-changing meson decays into the longitudinally polarized vector boson. In the case of a vector boson gauging $U(1{)}_{B-L}$, the mass gap between the top quark and the remaining SM fermions leads to (energy/vector mass)${}^2$ enhancements for processes with momentum transfer below the top mass. In addition, we examine the case of an intergenerational $U(1{)}_{B_3-L_2}$ that has been proposed to resolve the $(g-2{)}_{\mu }$ anomaly with an MeV scale DM candidate, and we find that these enhanced processes constrain the entire parameter space.

    hep-phhep-ex3 citations
15. 15*

    Parameter Space of Leptogenesis in Polynomial Inflation

    Manuel Drees🇩🇪 · Yong Xu🇩🇪

    Polynomial inflation is a very simple and well motivated scenario. A potential with a concave ``almost'' saddle point at field value $\varphi ={\varphi }_0$ fits well the cosmic microwave background (CMB) data and makes testable predictions for the running of the spectral index and the tensor to scalar ratio. In this work we analyze leptogenesis in the polynomial inflation framework. We delineate the allowed parameter space giving rise to the correct baryon asymmetry as well as being consistent with data on neutrino oscillations. To that end we consider two different reheating scenarios. $(i)$ If the inflaton decays into two bosons, the reheating temperature can be as high as $T_{\text{rh}}\sim 10^{14}$ GeV without spoiling the flatness of the potential, allowing vanilla $N_1$ thermal leptogenesis to work if $T_{\text{rh}}>M_1$ where $N_1$ is the lightest right--handed neutrino and $M_1$ its mass. Moreover, if the dominant decay of the inflaton is into Higgs bosons of the Standard Model, we find that rare three--body inflaton decays into a Higgs boson plus one light and one heavy neutrino allow leptogenesis even for $T_{\text{rh}}<M_1$ if the inflaton mass is of order $10^{12}$ GeV or higher; in the polynomial inflation scenario this requires ${\varphi }_0\gtrsim 2.5M_P$. This novel mechanism of non--thermal leptogenesis is quite generic, since the coupling leading to the three--body final state is required in the type I see--saw mechanism. $(ii)$ If the inflaton decays into two fermions, the flatness of the potential implies a lower reheating temperature. In this case inflaton decay to two $N_1$ still allows successful non--thermal leptogenesis if ${\varphi }_0\gtrsim 0.1M_P$ and $T_{\text{rh}}\gtrsim 10^6$ GeV.

    hep-phastro-ph.COJCAP(2024)·10 citations
16. 16*

    Hybrid star models in the light of new multi-messenger data

    Jia Jie Li (SWU, Chongqing)🇨🇳 · Armen Sedrakian (FIAS Frankfurt and U. Wroclaw)🇩🇪 · Mark Alford (Washington U., St. Louis)🇺🇸

    Recent astrophysical mass inferences of compact stars HESS J1731-347 and PSR J0952-0607, with extremely small and large masses respectively, as well as the measurement of the neutron skin of Ca in the CREX experiment challenge and constrain the models of dense matter. We examine the concept of hybrid stars - objects containing quark cores surrounded by nucleonic envelopes - as models that account for these new data along with other inferences. We employ a family of 81 nucleonic equations of state (EoSs) with variable skewness and slope of symmetry energy at saturation density and a constant speed-of-sound EoS for quark matter. For each nucleonic EoS, a family of hybrid EoSs is generated by varying the transition density, the energy jump, and the speed of sound. These models are tested against the data from GW170817 and J1731-347, which favor low-density soft EoS and J0592-0607 and J0740+6620, which require high-density stiff EoS. The addition of J0592-0607's mass measurement to the constraints has no significant impact on the parameter space of the admissible EoS, but allows us to explore the potential effect of pulsars more massive than J0740+6620, if such exists. We then examine the occurrence of twin configurations and quantify the ranges of masses and radii that they can possess. It is shown that including J1731-347 data favors EoSs that predict low-mass twins with $M\lesssim 1.3M_{\odot }$ that can be realized if the deconfinement transition density is low. If combined with large speed of sound in quark matter such models allow for maximum masses of hybrid stars in $2.0$--$2.6M_{\odot }$.

    ↳ astro-ph.HEhep-phnucl-thApJ(2024)·37 citations
17. 17*

    Robustness of the Galactic Center Excess Morphology Against Masking

    Yi-Ming Zhong🇨🇳 · Ilias Cholis🇺🇸

    The Galactic Center Excess (GCE) remains an enduring mystery, with leading explanations being annihilating dark matter or an unresolved population of millisecond pulsars. Analyzing the morphology of the GCE provides critical clues to identify its exact origin. We investigate the robustness of the inferred GCE morphology against the effects of masking, an important step in the analysis where the gamma-ray emission from point sources and the galactic disk are excluded. Using different masks constructed from Fermi point source catalogs and a wavelet method, we find that the GCE morphology, particularly its ellipticity and cuspiness, is relatively independent of the choice of mask for energies above 2-3 GeV. The GCE morphology systematically favors an approximately spherical shape, as expected for dark matter annihilation. Compared to various stellar bulge profiles, a spherical dark matter annihilation profile better fits the data across different masks and galactic diffuse emission backgrounds, except for the stellar bulge profile from Coleman et al. (2020), which provides a similar fit to the data. Modeling the GCE with two components, one from dark matter annihilation and one tracing the Coleman Bulge, we find this two-component model outperforms any single component or combinations of dark matter annihilation and other stellar bulge profiles. Uncertainty remains about the exact fraction contributed by each component across different background models and masks. However, when the Coleman Bulge dominates, its corresponding spectrum lacks characteristics typically associated with millisecond pulsars, suggesting that it mostly models the emission from other sources instead of the GCE that is still present and spherically symmetric.

    ↳ astro-ph.HEastro-ph.COastro-ph.GAhep-phPRD(2024)·25 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.