Highlights

Revisiting the heavy vector quarkonium leptonic widths
2020, 44(6): 063104. doi: 10.1088/16741137/44/6/063104We revisit the heavy quarkonium leptonic decays
$ \psi(nS) \to \ell^+\ell^ $ and$ \Upsilon(nS) \to \ell^+\ell^ $ using the BetheSalpeter method. The emphasis is on the relativistic corrections. For the$ \psi(1S5S) $ decays, the relativistic effects are$ 22^{+3}_{2} $ %,$ 34^{+5}_{5} $ %,$ 41^{+6}_{6} $ %,$ 52^{+11}_{13} $ % and$ 62^{+14}_{12} $ %, respectively. For the$ \Upsilon(1S5S) $ decays, the relativistic effects are$ 14^{+1}_{2} $ %,$ 23^{+0}_{3} $ %,$ 20^{+8}_{2} $ %,$ 21^{+6}_{7} $ % and$ 28^{+2}_{7} $ %, respectively. Thus, the relativistic corrections are large and important in heavy quarkonium leptonic decays, especially for the highly excited charmonium. Our results for$ \Upsilon(nS) \to \ell^+\ell^ $ are consistent with the experimental data. 
Axialvector tetraquark candidates for Z_{c}(3900), Z_{c}(4020), Z_{c}(4430), and Z_{c}(4600)
2020, 44(6): 063105. doi: 10.1088/16741137/44/6/063105We construct the axialvector and tensor current operators to systematically investigate the ground and first radially excited tetraquark states with quantum numbers
$J^{PC}=1^{+}$ using the QCD sum rules. We observe one axialvector tetraquark candidate for$Z_c(3900)$ and$Z_c(4430)$ , two axialvector tetraquark candidates for the$Z_c(4020)$ , and three axialvector tetraquark candidates for$Z_c(4600)$ . 
Extraction of the CKM phase γ from the charmless twobody B meson decays
2020, 44(6): 063101. doi: 10.1088/16741137/44/6/063101Using all experimentally measured charmless
$B \to PP$ ,$PV$ decay modes, where$P(V)$ denotes a light pseudoscalar (vector) meson, we extract the CKM angle$\gamma$ by a global fit. All hadronic parameters are determined from the experimental data, such that the approach is least model dependent. The contributions of the various decay modes are classified by the topological weak Feynman diagram amplitudes, which are determined by the global fit. To improve the precision of the approach, we consider the flavor SU(3) breaking effects of the topological diagram amplitudes of the decay modes by including the form factors and decay constants. The fit result for the CKM angle$\gamma$ is$(69.8 \pm 2.1 \pm 0.9) ^{\circ }$ . It is consistent with the current world average values but has a smaller uncertainty.
Just Accepted
More >

Chiral Magnetic Effect in Isobar Collisions from Stochastic Hydrodynamics
Published: 20200602, doi: 10.1088/16741137/44/9/094103

The fine microthermal structures for the ReissnerNordström black hole
Published: 20200602, doi: 10.1088/16741137/44/9/095106

Strong gravitational lensing for photon coupled to Weyl tensor in Kiselev black hole
Published: 20200602, doi: 10.1088/16741137/44/9/095105
In Press
More >

Novel relativistic mean field Lagrangian guided by pseudospin symmetry restoration
Published: 20200603, doi: 10.1088/16741137/44/7/074107Show AbstractThe relativistic mean field (RMF) model has achieved great success in describing various nuclear phenomena. However, several serious defects are common. For instance, the pseudospin symmetry of highl orbits is distinctly violated in general, leading to spurious shell closures
$ N/Z = 58 $ and$ 92 $ . This leads to problems in describing structure properties, including shell structures, nuclear masses, etc. Guided by the pseudospin symmetry restoration [Geng et al., Phys. Rev. C, 100: 051301 (2019)], a new RMF Lagrangian DDLZ1 is developed by considering the densitydependent mesonnucleon coupling strengths. With the newly obtained RMF Lagrangian DDLZ1, satisfactory descriptions can be obtained for the bulk properties of nuclear matter and finite nuclei. In particular, significant improvements on describing the singleparticle spectra are achieved by DDLZ1. In particular, the spurious shell closures$ Z = 58 $ and$ 92 $ , commonly found in previous RMF calculations, are eliminated by the new effective interaction DDLZ1, and consistently the pseudospin symmetry (PSS) around the Fermi levels is reasonably restored for both lowl and highl orbits. Moreover, the description of nuclear masses is also notably improved by DDLZ1, as compared to the other RMF Lagrangians. 
Analytical investigation of γN→N^{*},Δ^{*} transition helicity amplitudes
Published: 20200603, doi: 10.1088/16741137/44/7/074109Show AbstractWe study the structure of nonstrange baryons by analytically calculating the electromagnetic transition helicity amplitudes of the nucleon and Δ resonances. We employ an improved hypercentral constituent quark model and obtain the corresponding eigenenergies and eigenfunctions in closed forms. Then, we calculate the transverse and longitudinal helicity amplitudes for nucleon and Δ resonances. The comparison of evaluated observables and experimental data indicates good agreement between the proposed model and available data.

Formation region of emitted α and heavier particles inside radioactive nuclei
Published: 20200601, doi: 10.1088/16741137/44/7/074105Show AbstractWe investigate the formation distance (R_{0}) from the center of the radioactive parent nucleus at which the emitted cluster is most probably formed. The calculations are performed microscopically starting with the solution to the timeindependent Schrödinger wave equation for the clustercore system, using nuclear potentials based on the SkyrmeSLy4 nucleonnucleon interactions and folding Coulomb potential, to determine the incident and transmitted wave functions of the system. Our results show that the emitted cluster is mostly formed in the presurface region of the nucleus, under the effect of Pauli blocking from the saturated core density. The deeper αformation distance inside the nucleus allows less preformation probability and indicates a more stable nucleus for a longer halflife. Furthermore, the αparticle tends to be formed at a slightly deeper region inside the nuclei, with larger isospin asymmetry, and in the closed shell nuclei. Regarding the heavy clusters, we observed that the formation distance of the emitted clusters heavier than αparticle increased via increasing the isospin asymmetry of the formed cluster rather than by increasing its mass number. The partial halflife of a certain clusterdecay mode increased with increase of either the mass number or the isospin asymmetry of the emitted cluster.
Archive
ISSN 16741137 CN 115641/O4
Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
 Particle physics
 Nuclear physics
 Particle and nuclear astrophysics
 Cosmology
Author benefits
 A SCOAP3 participating journal  free Open Access publication for qualifying articles
 Average 24 days to first decision
 Fasttrack publication for selected articles
 Subscriptions at over 3000 institutions worldwide
 Free English editing on all accepted articles
News
 Chinese Physics C: 2019 Reviewer Awards
 FUTURE PHYSICS PROGRAMME OF BESIII
 Happy New Year !
 2019 CPC Top Reviewer Awards
 The 2019 National Day closure
Meet Editor