Showing papers in "Nuclear Physics in 2021"

TL;DR: In this paper, a double cover of the modular permutation group S 4 ≃ S 4 for theories of flavour has been developed, where the integer weight k > 0 of the level 4 modular forms indispensable for the formalism can be even or odd.

TL;DR: In this paper, the potential contributions of the motion of binary mass systems in gravity to the fifth post-Newtonian order ab initio using coupling and velocity expansions within an effective field theory approach based on Feynman amplitudes starting with harmonic coordinates and using dimensional regularization were calculated.

TL;DR: In this paper, a model with radiatively induced neutrino mass at two-loop level, applying modular A 4 symmetry, is proposed, where the structure of associated couplings is restricted by the symmetry.

TL;DR: In this article, an inverse seesaw model based on right-handed fermion specific U (1 ) gauge symmetry and A 4 -modular symmetry is proposed, which forbid unnecessary terms and restrict structures of Yukawa interactions.

TL;DR: In this paper, the authors used the new data of the muon g − 2 to revisit several GUT-scale constrained SUSY models with the constraints from the LHC searches, the dark matter detection, the flavour data and the electroweak vacuum stability.

TL;DR: In this paper, a top-down analysis of modular symmetries of string compactifications is presented, where the modular groups, including CP and R-symmetries, are derived for different sub-sectors of six-dimensional string compactification and the general properties of the allowed flavor groups are determined.

TL;DR: In this paper, a hybrid renormalization procedure was proposed to match the lattice correlations to those in the continuum MS scheme, without introducing extra nonperturbative effects at large z.

TL;DR: In this article, the influence of global baryon number conservation on the non-critical baseline of net proton cumulants in heavy-ion collisions in a given acceptance was studied.

TL;DR: In this paper, the spectra of fully-heavy tetraquarks within Bethe-Salpeter equation and Regge trajectory relation were studied and new structures around 6.0 GeV, 6.5 GeV and 7.1 GeV were predicted together.

TL;DR: In this paper, the authors study a time-dependent background in type IIB theory, with four-dimensional de Sitter isometries, by uplifting it to M-theory and then realizing it as a coherent, or squeezed-coherent, state over an appropriate solitonic configuration.

TL;DR: In this paper, the authors analyzed the Z c s + about its possible configuration and physical properties, and found it could be configured as a mixture of two types of structures, i.e., [ 1 c ] c ¯ u ⊗ [ 1c ] s ¯ c and [ 1 C ] c ǫ u, or [ 3 c ] u ï s ¯ u, with J P = 1 +.

TL;DR: In this paper, the Hubble constant tension problem is analyzed in the framework of a class of modified gravity, the so-called F (R ) gravity, which includes an early dark energy (EDE) term in the latter.

TL;DR: In this article, the geometrical origin of CP and spontaneous CP violation in Calabi-Yau compactifications are explored, and it is shown that the spontaneous CP symmetry is identified with an outer automorphism of the symplectic modular group in the large complex structure regime of Calabi Yau threefolds, thereby enlarging the modular group to their semidirect product group.

TL;DR: In this article, the quantum sine-Gordon (qSG) model in 1+1 space-time dimensions is analyzed using the density matrix renormalization group technique and benchmarked with existing Bethe ansatz computations.

TL;DR: In this paper, a nonconventional U ( 1 ) e − μ gauge model is proposed to explain the observed neutrino masses and the unexpected anomalous magnetic moments of the electron and muon (lepton g − 2 ).

TL;DR: In this paper, the authors investigated lepton mass spectra, flavor mixing and CP violation with a modular S 4 symmetry under the assumption that neutrinos are Dirac fermions, and they found that the Majorana mass term can be forbidden by adjusting the weight of the right-handed neutrino superfields.

TL;DR: In this article, the unpolarized and polarized three-loop anomalous dimensions and splitting functions were calculated in the MS scheme by using the traditional method of space-like off shell massless operator matrix elements.

TL;DR: In this article, the authors discuss a possibility that the parameter space of the two Higgs doublet model is significantly narrowed down by considering the synergy between direct searches for additional Higgs bosons at the LHC and its luminosity upgraded operation and precision measurements of the Higgs properties at future electron-positron colliders such as the International Linear Collider.

TL;DR: In this article, an analysis of the b → c τ ν data, including R ( D ( ⁎ ) ), R ( J / ψ ), P τ ( D ‎ ) and F L D ₎, within and beyond the Standard Model (SM) is performed, and the results show that the R 2 leptoquark model is in tension with the limit B ( B c → τ ) 10 %.

TL;DR: In this paper, a data-driven analysis of new physics effects in exclusive $b \to s \ell^+\ell^-$ decays in a model-independent effective theory approach with dimension six effective operators considering scalar, pseudo-scalar, vector, and axial-vector operators with the corresponding Wilson coefficients (WC) taken to be complex.

TL;DR: In this article, the authors investigated the possibility that heavy sparticles explain the muon g − 2 anomaly and found that the contribution of bino-smuon loop can significantly increase the prediction of muon G − 2 to the experimental value.

TL;DR: In this paper, the authors used machine learning and non-ML techniques to study optimized CP-odd observables, directly and maximally sensitive to the CPodd i κ ˜ t ¯ γ 5 t h interaction at the LHC and prospective future hadron colliders using the final state with a Higgs boson and a top quark pair.

TL;DR: In this paper, a general parametrization for the neutrino Dirac mass matrix is employed to identify the allowed regions satisfying the experimental constraints from neutrinos oscillation data, the electroweak precision measurements and the lepton-flavor violating processes.

TL;DR: In this paper, the authors introduce a theoretical framework to analyze the thermal properties of a recently proposed "excluded volume" model of quarkyonic matter, which consists of finite temperature distribution functions and entropy functionals constrained by internal theoretical consistency.

TL;DR: In this article, a review of recent lattice QCD results on a few selected topics which are relevant to the heavy ion physics community is presented, with special emphasis on the QCD phase diagram towards the chiral limit and at nonzero baryon density.

TL;DR: In this article, the scattering of mirror electrons with ordinary electrons through photon-mirror photon kinetic mixing with parameter ϵ ∼ 10 − 12 ( n e ǫ / 02 c m − 3 ) − 1 / 2 ( v c 0 / 5 × 10 9 cm s − 1 ) 1/2 was suggested to account for the excess electronic recoil events in XENON1T, where n à is the density of mirror electron and v c à 0 is the cutoff velocity of the mirror electron arriving at the earth.

TL;DR: In this article, the authors revisited, improved and complete some recent estimates of the 0+ and 1− open charm (c¯d¯)(us) tetraquarks and the corresponding molecules masses and decay constants from QCD spectral sum rules (QSSR) by using QCD Laplace sum rule (LSR) within stability criteria where the factorised perturbative NLO corrections and the contributions of quark and gluon condensates up to dimension-6 in the OPE are included.

TL;DR: In this article, the energy and centrality dependence of (anti)deuteron and triton production in Au+Au collisions at s NN = 7.7, 11.5, 14.6, 27, 39, 54.4, and 200 GeV measured by the STAR experiment at RHIC.

TL;DR: In this article, the authors investigated the behavior of elliptic Feynman integrals under modular transformations and showed that the nome squared is a small quantity, leading to fast numerical evaluations.

TL;DR: In this paper, a hybrid model which relies on QCD effective kinetic theory (KoMPoST) is used to dynamically bridge the gap between IP-Glasma initial states and viscous hydrodynamics, for the theoretical interpretation of heavy-ion collision results.