Zobrazeno 1 - 10
of 2 748
pro vyhledávání: '"Wang, Zhi‐Gang"'
Autor:
Wang, Zhi-Gang
In this work, we study the mass spectrum of the hidden-charm hybrid states with the $J^{PC}=0^{-+}$, $0^{++}$, $0^{--}$, $1^{++}$, $1^{+-}$, $1^{-+}$, $1^{--}$, $2^{-+}$ and $2^{++}$ via the QCD sum rules in a consistent way. We calculate the vacuum
Externí odkaz:
http://arxiv.org/abs/2412.11038
Analysis of the form factors of $B_c\rightarrow D^{(*)}$, $D_{s}^{(*)}$ and their nonleptonic decays
This article is devoted to calculating the form factors of $B_c \to D^{*}$, $B_c \to D$, $B_c \to D_s^{*}$ and $B_c \to D_s$ transitions in the framework of three-point QCD sum rules. At the QCD side, the contributions of $\langle\overline{q}q\rangle
Externí odkaz:
http://arxiv.org/abs/2412.00515
Autor:
Wang, Zhi-Gang
In this work, we introduce explicit P-waves to construct the diquark operators, then construct the local four-quark currents to explore the hidden-charm tetraquark states with the $J^{PC}=0^{++}$, $1^{+-}$ and $2^{++}$ in the framework of the QCD sum
Externí odkaz:
http://arxiv.org/abs/2409.19348
Autor:
Xin, Qi, Wang, Zhi-Gang
We systematically study the 1D charmonium spin-triplet (with the $J^{PC}=1^{--}, 2^{--}, 3^{--}$) and spin-singlet (with the $J^{PC}=2^{-+}$) via the QCD sum rules in comparison with the present experimental results. More experimental data will help
Externí odkaz:
http://arxiv.org/abs/2409.08051
Autor:
Yang, Xiao-Song, Wang, Zhi-Gang
We introduce a relative P-wave to construct the vector doubly-charm diquark $(\widetilde{V})$, therefore, the scalar and tensor tetraquark currents to investigate the decay widths of the fully-charm tetraquark states with the $J^{PC}=0^{++}$, $1^{+-}
Externí odkaz:
http://arxiv.org/abs/2409.05428
Publikováno v:
Eur. Phys. J. C 84, 1130 (2024)
Inspired by the great progress in the observations of charmonium-like states in recent years, we perform a systematic analysis about the ground states and the first radially excited states of $qc\bar{q}\bar{c}$ ($q$=$u/d$ and $s$) tetraquark systems.
Externí odkaz:
http://arxiv.org/abs/2408.13826
Autor:
Dong, Wen-Chao, Wang, Zhi-Gang
Inspired by the first $T_{cc}$ observation at the LHCb Collaboration, the spectroscopic properties of the entire isoscalar and isovector $T_{cc}$ family are systematically unveiled by means of multiple sorts of relativized and nonrelativistic diquark
Externí odkaz:
http://arxiv.org/abs/2407.19383
Autor:
Wang, Zhi-Gang
Publikováno v:
Nucl. Phys. B1007 (2024) 116661
In the present work, we construct the diquark-antidiquark type four-quark currents to investigate the mass spectrum of the ground state hidden-charm-hidden-strange tetraquark states with the quantum numbers $J^{PC}=0^{++}$, $1^{+-}$, $1^{++}$ and $2^
Externí odkaz:
http://arxiv.org/abs/2407.08759
The form factors of $B_c\rightarrow\eta_c$ and $B_c\rightarrow J/\psi$ are analyzed in the framework of three-point QCD sum rules. In these analyses, the contributions of the vacuum condensate terms $\langle g_{s}^{2}GG\rangle$ and $\langle g_{s}^{3}
Externí odkaz:
http://arxiv.org/abs/2406.08181
We obtain a sharp result on order of certain affine and linear invariant families of harmonic quasiconformal mappings with bounded Schwarzian norm. This problem is motivated by the work of Chuaqui, Hern\'{a}ndez and Mart\'{i}n [Math. Ann. 367: 1099--
Externí odkaz:
http://arxiv.org/abs/2405.19852