Strong coupling constants and radiative decays of the heavy tensor mesons

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.

Mass spectroscopy, decays and mixing parameters of open flavour bottom and bottom strange mesons using instanton induced potential with additional confinement

“…(378 keV) are consistent with those predicted by non-relativistic potential model in [53] and WMM variant of MIT bag model in [94]. While it is lower than the results of constituent quark model [29], three-point QCD sum rules [95] and GI relativized quark model [12]. The width of Γ[B s (1 3 P 2 ) → B s (1 3 S 1 ) + γ] (278 keV) is interestingly comparable to 225 keV predicted by constituent quark model [29] but higher than the value predicted by [53,94,95].…”

Spectroscopic Properties of $\mathit {B}$ and $\mathit {B_s}$ meson using Screened Potential

“…models, potential model, Bethe-Salpeter equation as well as constituent quark model [6,14,10,8,13,15,16,17,18,19]. Also, the strong decays, radiative decays, and semileptonic decays have been calculated theoreticaly [20,21,22,23,24,25,26]. B 1 (5721), B * 2 (5747), B S1 (5830), B * S2 (5840) are well entrenched states and various quark model studies [26,27,28,20,21,22,23,29,30,31] have tried to prove them as first excitations of B and B s meson.…”

Towards establishing an abundant $B$ and $B_s$ spectrum up to the second orbital excitations

“…Our predicted radiative partial decay width is consistent with those predictions in Refs. [32,73]. In the literature, a larger partial width Γ[B * s2 (5840) 0 → B * 0 s γ] ≃ 100 − 230 keV is predicted [17][18][19].…”

“…Stimulated by the exciting progress in experiments, many theoretical studies of the masses [11][12][13][14][15][16][17][18][19], strong decays [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], radiative decays [17-19, 32, 33], and semileptonic decays [34] for the excited bottom and bottom-strange meson states have been carried out with different methods in recent * mail: zhongxh@hunnu.edu.cn years. For the well established states B 1 (5721), B * 2 (5747), B s1 (5830) and B * s2 (5840), there are no puzzles to classify them as the first orbital excitations (i.e.…”