Strong coupling constants and radiative decays of the heavy tensor mesons

Abstract

AbstractIn 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∗Bsϕand$$D_{s2}^{*}D_{s}\phi $$Ds2∗Dsϕin 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.