Strong coupling constants and radiative decays of the heavy tensor mesons

Autor: Guo-Liang Yu, Zhi-Gang Wang, Zhen-Yu Li
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 79, Iss 9, Pp 1-9 (2019)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-019-7314-2
Popis: Abstract In this article, we analyze tensor-vector-pseudoscalar(TVP) type of vertices $$D_{2}^{*+}D^{+}\rho $$ D2∗+D+ρ , $$D_{2}^{*0}D^{0}\rho $$ D2∗0D0ρ , $$D_{2}^{*+}D^{+}\omega $$ D2∗+D+ω , $$D_{2}^{*0}D^{0}\omega $$ D2∗0D0ω , $$B_{2}^{*+}B^{+}\rho $$ B2∗+B+ρ , $$B_{2}^{*0}B^{0}\rho $$ B2∗0B0ρ , $$B_{2}^{*+}B^{+}\omega $$ B2∗+B+ω , $$B_{2}^{*0}B^{0}\omega $$ B2∗0B0ω , $$B_{s2}^{*}B_{s}\phi $$ Bs2∗Bsϕ and $$D_{s2}^{*}D_{s}\phi $$ Ds2∗Dsϕ in the frame work of three point QCD sum rules(QCDSR). According to these analysis, we calculate their strong form factors which are used to fit into analytical functions of $$Q^{2}$$ Q2 . Then, we obtain the strong coupling constants by extrapolating these strong form factors into deep time-like regions. As an application of this work, the coupling constants for radiative decays of these heavy tensor mesons are also calculated at the point of $$Q^{2}=0$$ Q2=0 . With these coupling constants, we finally obtain the radiative decay widths of these tensor mesons.
Databáze: Directory of Open Access Journals
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