Highlights

Scalarpseudoscalar pair production at the Large Hadron Collider at NLO+NLL accuracy in QCD
2021, 45(12): 123102. doi: 10.1088/16741137/ac23d2We thoroughly investigate both transverse momentum and threshold resummation effects on scalarpseudoscalar pair production via quarkantiquark annihilation at the
$ 13 \; \text{TeV}$ Large Hadron Collider at QCD NLO+NLL accuracy. A factorization method is introduced to properly supplement the softgluon (threshold) resummation contribution from parton distribution functions to the resummed results obtained by the CollinsSoperSterman resummation approach. We find that the impact of the thresholdresummation improved PDFs is comparable to the resummation effect of the partonic matrix element and can even predominate in high invariant mass regions. Moreover, the loopinduced gluongluon fusion channel in the typeI twoHiggsdoublet model is considered in our calculations. The numerical results show that the electroweak production via quarkantiquark annihilation dominates over the gluoninitiated QCD production by$ 1 \sim 2$ orders of magnitude. 
Measurements of ^{nat}Cd(γ, x) reaction cross sections and isomer ratio of ^{115m,g}Cd with the bremsstrahlung endpoint energies of 50 and 60 MeV
2021, 45(12): 124002. doi: 10.1088/16741137/ac256bThe fluxweighted average cross sections of ^{nat}Cd(γ, xn)^{115g,m,111m,109,107,105,104}Cd and ^{nat}Cd(γ, x)^{113g,112,111g,110m}Ag reactions were measured at the bremsstrahlung endpoint energies of 50 and 60 MeV. The activation and offline γray spectrometric technique was carried out using the 100 MeV electron linear accelerator at the Pohang Accelerator Laboratory, Korea. The ^{nat}Cd(γ, xn) reaction cross sections as a function of photon energy were theoretically calculated using the TALYS1.95 and the EMPIRE3.2 Malta codes. Then, the fluxweighted average cross sections were obtained from the theoretical values of monoenergetic photons. These values were compared with the fluxweighted values from the present study and were found to be in general agreement. The measured experimental reaction crosssections and integral yields were described for cadmium and silver isotopes in the ^{nat}Cd(γ, xn)^{115g,m,111m,109,107,105,104}Cd and ^{nat}Cd(γ, x)^{113g,112,111g,110m}Ag reactions. The isomeric yield ratio (IR) of ^{115g,m}Cd in the ^{nat}Cd(γ, xn) reaction was determined for the two bremsstrahlung endpoint energies. The measured isomeric yield ratios of ^{115g,m}Cd in the ^{nat}Cd(γ, xn) reaction were also compared with the theoretical values of the nuclear model codes and previously published literature data of the ^{116}Cd(γ, n) and ^{116}Cd(n, 2n) reactions. It was found that the IR value increases with increasing projectile energy, which demonstrates the characteristic of excitation energy. However, the higher IR value of ^{115g,m}Cd in the ^{116}Cd(n, 2n) reaction compared to that in the ^{116}Cd(γ, n) reaction indicates the role of compound nuclear spin alongside excitation energy.

Magnetic moment predictions of oddA nuclei with the Bayesian neural network approach
2021, 45(12): 124107. doi: 10.1088/16741137/ac28f9The Bayesian neural network approach has been employed to improve the nuclear magnetic moment predictions of oddA nuclei. The Schmidt magnetic moment obtained from the extreme singleparticle shell model makes large rootmeansquare (rms) deviations from data, i.e., 0.949
$ \mu_\mathrm{N} $ and 1.272$ \mu_\mathrm{N} $ for oddneutron nuclei and oddproton nuclei, respectively. By including the dependence of the nuclear spin and Schmidt magnetic moment, the machinelearning approach precisely describes the magnetic moments of oddA nuclei with rms deviations of 0.036$ \mu_\mathrm{N} $ for oddneutron nuclei and 0.061$ \mu_\mathrm{N} $ for oddproton nuclei. Furthermore, the evolution of magnetic moments along isotopic chains, including the staggering and sudden jump trend, which are difficult to describe using nuclear models, have been well reproduced by the Bayesian neural network (BNN) approach. The magnetic moments of doubly closedshell$ \pm1 $ nuclei, for example, isoscalar and isovector magnetic moments, have been well studied and compared with the corresponding nonrelativistic and relativistic calculations.
Just Accepted
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Finite size effect on Dissociation and Diffusion of chiral partners in NambuJonaLasinio model
Published: 20211207, doi: 10.1088/16741137/ac3def

Annihilation diagram contribution to charmonium masses
Published: 20211202, doi: 10.1088/16741137/ac3d8c

Twocomponent millicharged dark matter and the EDGES 21cm signal
Published: 20211202, doi: 10.1088/16741137/ac3d2b
In Press
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Toward discovering lowlying Pwave excited Σ_{c} baryon states
Published: 20211203, doi: 10.1088/16741137/ac3123Show AbstractIn this study, by combining the equal spacing rule with recent observations of
$ \Omega_c(X) $ and$ \Xi_c(X) $ baryons, we predict the spectrum of the lowlying$ \lambda $ mode$ 1P $ wave excited$ \Sigma_c $ states. Furthermore, their strong decay properties are predicted using the chiral quark model and the nature of$ \Sigma_c(2800) $ is investigated by analyzing the$ \Lambda_c\pi $ invariant mass spectrum. The$ \Sigma_c(2800) $ structure observed in the$ \Lambda_c \pi $ mass spectrum was found to potentially arise from two overlapping$ P $ wave$ \Sigma_c $ resonances,$ \Sigma_c(2813)3/2^ $ and$ \Sigma_c(2840)5/2^ $ . These resonances have similar decay widths of$ \Gamma\sim 40 $ MeV and predominantly decay into the$ \Lambda_c \pi $ channel. The$ \Sigma_c(2755)1/2^ $ state is likely to be a very narrow state with a width of$ \Gamma\sim 15 $ MeV, with its decays almost saturated by the$ \Lambda_c \pi $ channel. Additionally, evidence of the$\Sigma_c(2755) {1}/{2}^$ resonance as a very narrow peak may be seen in the$ \Lambda_c\pi $ invariant mass spectrum. The other two$ P $ wave states,$\Sigma_c(2746) {1}/{2}^$ and$\Sigma_c(2796) {3}/{2}^$ , are relatively narrow states with similar widths of$ \Gamma\sim 30 $ MeV and predominantly decay into$ \Sigma_c\pi $ and$ \Sigma^{*}_c\pi $ , respectively. This study can provide useful references for discovering these lowlying$ P $ wave states in forthcoming experiments. 
Phase structures of neutral dense quark matter and applicationto strange stars
Published: 20211125, doi: 10.1088/16741137/ac2f95Show AbstractIn the contact interaction model, the quark propagator has only one solution, namely, the chiral symmetry breaking solution, at vanishing temperature and density in the case of physical quark mass. We generalize the condensate feedback onto the coupling strength from the 2 flavor case to the 2+1 flavor case, and find the Wigner solution appears in some regions, which enables us to tackle chiral phase transition as twophase coexistences. At finite chemical potential, we analyze the chiral phase transition in the conditions of electric charge neutrality and
$ \beta $ equilibrium. The four chemical potentials,$ \mu_u $ ,$ \mu_d $ ,$ \mu_s $ and$ \mu_e $ , are constrained by three conditions, so that one independent variable remains: we choose the average quark chemical potential as the free variable. All quark masses and number densities suffer discontinuities at the phase transition point. The strange quarks appear after the phase transition since the system needs more energy to produce a$ d $ quark than an$ s $ quark. Taking the EOS as an input, the TOV equations are solved numerically, and we show that the mass–radius relation is sensitive to the EOS. The maximum mass of strange quark stars is not susceptible to the parameter$ \Lambda_q $ we introduced. 
Modelindependent Veltman condition, naturalness and the little hierarchy problem
Published: 20211124, doi: 10.1088/16741137/ac2ffaShow AbstractWe adopt a bottomup Effective Field Theory (EFT) approach to derive a modelindependent Veltman condition to cancel out the quadratic divergences in the Higgs mass. We show using the equivalence theorem that all the deviations in the Higgs couplings to the
$ W $ and$ Z $ from the SM predictions should vanish. We argue based on treelevel unitarity that any new physics that naturally cancels out the quadratic divergences should be$ \lesssim 19 $ TeV. We show that the level of finetuning required is$ O(0.1\%1\%) $ unless the UV sector has a symmetry that forces the satisfaction of the modelindependent Veltman condition, in which case all finetuning is eliminated. We also conjecture that, if no new physics that couples to the Higgs is observed up to$ \sim 19 $ TeV, or if the Higgs couplings to the SM particles conform to the SM predictions, then the Higgs either does not couple to any UV sector or is finetuned.
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