Highlights

Performance and calibration of quark/gluonjet taggers using 140 fb^{−1} of pp collisions at
${{\sqrt{\boldsymbol s}\bf = 13}}$ TeV with the ATLAS detector2024, 48(2): 023001. doi: 10.1088/16741137/acf701The identification of jets originating from quarks and gluons, often referred to as quark/gluon tagging, plays an important role in various analyses performed at the Large Hadron Collider, as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluoninduced background. This paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration, using$\sqrt{s} = 13$ TeV proton–proton collision data with an integrated luminosity of 140 fb$^{1}$ collected by the ATLAS experiment. Two taggers with high performances in rejecting jets from gluon over jets from quarks are studied: one tagger is based on requirements on the number of innerdetector tracks associated with the jet, and the other combines several jet substructure observables using a boosted decision tree. A method is established to determine the quark/gluon fraction in data, by using quark/gluonenriched subsamples defined by the jet pseudorapidity. Differences in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points. 
Photonuclear reactions on stable isotopes of selenium at bremsstrahlung endpoint energies of 10−23 MeV
2024, 48(2): 024002. doi: 10.1088/16741137/ad11e4In this study, experiments were performed at bremsstrahlung endpoint energies of 10−23 MeV with the beam from the MT25 microtron using the
γactivation technique. The experimental values of relative yields were compared with theoretical results obtained on the basis of TALYS with the standard parameters and the combined model of photonucleon reactions. Including isospin splitting in the combined model of photonucleon reactions allows describing experimental data on reactions with proton escape in the energy range from 10 to 23 MeV. Therefore, taking into account isospin splitting is necessary for a correct description of the decay of the giant dipole resonance. 
Description of elastic scattering for ^{7}Liinduced reactions on 1pshell nuclei
2024, 48(2): 024106. doi: 10.1088/16741137/ad1924The experimental data of elastic scattering angular distributions for ^{9}Be, ^{10}B, ^{11}B, ^{12}C, ^{13}C, ^{15}N, and ^{16}O targets from 4.5 to 131.8 MeV and ^{7}Li target from 8.0 to 42.0 MeV are fitted to realize the global phenomenological optical potentials (GPOPs) for the ^{7}Liinduced reactions on 1pshell nuclei. Thus, the ^{7}Li elastic scattering from the 1pshell nuclei can be systematically described using the established GPOPs. The elastic scattering angular distributions are also reanalyzed using a microscopic method within the framework of the new version of double folding São Paulo potential (SPP2). To better describe the elastic scattering at backward angles, the contribution of elastic transfer is further estimated by the distorted wave Born approximation (DWBA) method. Based on the obtained GPOPs, the inelastic scattering angular distributions are also obtained through the coupled channels (CC) method for the different excited states.
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The Analytical Solutions of Equatorial Geodesic Motion in Kerr Spacetime
Published: 20240227

Pair of dyon production near the magnetized dyonic ReissnerNordstrom black holes
Published: 20240225

Oneloop contributions for
${\boldsymbol h \bf\rightarrow \boldsymbol\ell \bar{\boldsymbol\ell}\gamma}$ and${{\boldsymbol e}^{\bf }{\boldsymbol e}^{\bf +}\bf\rightarrow {\boldsymbol h\gamma}}$ in${{\boldsymbol U}{\bf (1)}_{{\boldsymbol B}{\bf }{\boldsymbol L}}}$ extension of the standard modelPublished: 20240224
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Reconstruction of aether scalar tensor theory for variouscosmological scenarios
2024, 48(4): 0451050451057. doi: 10.1088/16741137/ad2360Show AbstractIn this paper, we present several explicit reconstructions for the aether scalar tensor (AeST) theory derived from the background of the FriedmannLemaîtreRobertsonWalker cosmological evolution. It is shown that the EinsteinHilbert Lagrangian with a positive cosmological constant is the only Lagrangian capable of accurately replicating the exact expansion history of the Λ cold dark matter (ΛCDM) universe filled solely with dustlike matter. However, the ΛCDMera can be produced within the framework of the AeST theory for some other fluids, including a perfect fluid with
$ p=(1/3)\rho $ , multifluids, and nonisentropic perfect fluids. Moreover, we demonstrate that the ΛCDMera can be replicated with no real matter field for the AeST theory. The cosmic evolution resulting from both the powerlaw and deSitter solutions can also be obtained. 
Leptonic diflavor and dinumber violation processes at high energy
${{ {\boldsymbol\mu}^{\bf\pm}}{\boldsymbol\mu}^{\bf\pm}} $ colliders2024, 48(4): 04310104310117. doi: 10.1088/16741137/ad17b0Show AbstractThe leptonic diflavor violation (LFV) processes$ \mu^\pm \mu^\pm \rightarrow e^\pm e^\pm $ and$ \mu^\pm \mu^\pm \rightarrow \tau^\pm \tau^\pm $ and leptonic dinumber violation (LNV) processes$ \mu^\pm \mu^\pm \rightarrow W^\pm _iW^\pm _j $ ($ i,\;j=1,\;2 $ ) at samesign high energy$ \mu^\pm \mu^\pm $ colliders are studied. The new physics (NP) factors that may play roles in these processes are highlighted by cataloging them into three types. Taking into account the experimental constraints, the processes at$ \mu^\pm\mu^\pm $ colliders are computed, and the results are presented properly. The results lead to the conclusion that observing the NP factors through the LFV and LNV processes at TeVenergy$ \mu^\pm\mu^\pm $ colliders has significant advantages that cannot be achieved elsewhere. Therefore, once the techniques for muon acceleration and collision are developed successfully, the option of building samesign high energy muon colliders should be seriously considered. 
Higgs inflation model with nonminimal coupling in hybrid Palatini approach
2024, 48(4): 0451040451049. doi: 10.1088/16741137/ad1dcdShow AbstractIn this paper, we propose a hybrid metric Palatini approach in which the Palatini scalar curvature is non minimally coupled to the scalar field. We derive Einstein's field equations, i.e., the equations of motion of the scalar field. Furthermore, the background and perturbative parameters are obtained by means of Friedmann equations in the slow roll regime. The analysis of cosmological perturbations allowed us to obtain the main inflationary parameters, e.g., the scalar spectral index
$ n_s $ and tensor to scalar ratio r. From this perspective, as an application of our analysis, we consider the Higgs field with quartic potential, which plays the inflaton role, and show that predictions of Higgs hybrid inflation are in good agreement with recent observational data [Astron. Astrophys. 641, 61 (2020)].
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Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
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