Strong decay constants of heavy tensor mesons in light cone QCD sum rules

Abstract

Strong decay constants of the heavy tensor to heavy pseudoscalar (vector) and light pseudoscalar mesons are estimated within the light cone QCD sum rules. It is observed that the values of these coupling constants show a significant dependence on the choice of the Lorentz structure. Additionally, the decay widths of these mesons are calculated and discussed within the light of experimental data. A comparison of our results on these coupling constants with the predictions from the 3-point sum rules is performed.

A review of the open charm and open bottom systems

“…[463,160,464,465,161,162,466] and QCD sum rule studies in Refs. [467,468,469,470]. More discussions using other models and methods can be found in Refs.…”

Radiative decays of the heavy tensor mesons in light cone QCD sum rules

“…The lower limit of M 2 is obtained from the condition that the OPE series, that is, the higher twist contributions should be smaller compared to the leading twist contributions. These conditions lead to the following working region of M The continuum threshold s 0 is obtained from the analysis of the mass sum rules, and are given as: (s 0 ) D 2 = (8.5 ± 0.5) GeV 2 , (s 0 ) Ds 2 = (9.5 ± 0.5) GeV 2 [16,29], (s 0 ) B 2 = (39 ± 1) GeV 2 , (s 0 ) Bs 2 = (41 ± 1) GeV 2 [30].…”

“…These observations have stimulated a chain of many studies. For example, the strong coupling constants of the aforementioned decays have been calculated in the framework of the three-point sum rules [13][14][15], and in the light cone QCD sum rules (LCSR) methods [16].…”

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

“…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.…”