Zobrazeno 1 - 10
of 307
pro vyhledávání: '"YU GUO-LIANG"'
The mass spectra, root mean square (r.m.s.) radii and radial density distributions of $\Omega_{ccb}$ and $\Omega_{bbc}$ baryons are systematically analyzed in the present work. The calculations are carried out in the frame work of relativized quark m
Externí odkaz:
http://arxiv.org/abs/2501.01803
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
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
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
Publikováno v:
Eur.Phys.J.C 84 (2024), 1310
In the framework of the relativized quark model, the calculation of spin-orbit interactions is improved by considering the contribution from the light quark cluster in a singly heavy baryon. It modifies the energy level splitting of the orbital excit
Externí odkaz:
http://arxiv.org/abs/2405.16162
Publikováno v:
Phys. Lett. B 852 (2024) 138624
In this article, we analyze the electromagnetic form factors of the vector heavy-light mesons to the pseudoscalar heavy-light mesons in the framework of three-point QCD sum rules, where the contributions of vacuum condensate terms $\langle\overline{q
Externí odkaz:
http://arxiv.org/abs/2401.00669
Publikováno v:
Eur.Phys.J.C84,106(2024)
A mechanism of the heavy quark dominance in the orbital excitation is proposed in this paper which is testified to be reasonable for singly and doubly heavy baryons. In the relativistic quark model, an analysis of the Hamiltonian figures out the mech
Externí odkaz:
http://arxiv.org/abs/2311.08251
Publikováno v:
Eur. Phys. J. C (2023) 83:907
In this work, we analyze the strong vertices $\Sigma_{c}\Delta D^{*}$ and $\Sigma_{b}\Delta B^{*}$ using the three-point QCD sum rules under the tensor structures $i\epsilon^{\rho\tau\alpha\beta}p_{\alpha}p'_{\beta}$, $p^{\rho}p'^{\tau}$ and $p^{\rho
Externí odkaz:
http://arxiv.org/abs/2308.06705
Publikováno v:
Chin.Phys.C 48 (2024) 013102
In this article, the strong coupling constants of vertices $BB\Upsilon$, $BB^{*}\Upsilon$, $B^{*}B^{*}\Upsilon$, $BB^{*}\eta_{b}$ and $B^{*}B^{*}\eta_{b}$ are analyzed in the framework of QCD sum rules. In this work, all possible off-shell cases and
Externí odkaz:
http://arxiv.org/abs/2307.05090
Publikováno v:
Eur. Phys. J. A (2023) 59:195
In this work, the strong coupling constants of the vertices $DDJ/\psi$, $DD^{*}J/\psi$, $D^{*}D^{*}J/\psi$, $DD^{*}\eta_{c}$ and $D^{*}D^{*}\eta_{c}$ are calculated within the framework of the QCD sum rules. For each vertex, we analyze the momentum d
Externí odkaz:
http://arxiv.org/abs/2304.13969