The average kinetic energy of the heavy quark inside B or D meson is computed by means of the instantaneous Bethe-Salpeter method. We first solve the relativistic Salpeter equation and obtain the relativistic wave function and mass of 0- state, then we use the relativistic wave function to calculate the average kinetic energy of the heavy quark inside heavy meson of 0- state. We find that the relativistic corrections to the average kinetic energy of the heavy quark inside B or D meson are quite large and cannot be ignored. We estimate μπ2(=-λ 1)≈0.24(B0,B±), 0.20(D 0,D±), 0.33(Bs), 0.26(Ds), 0.83(Bc) and 0.62(ηc) GeV2.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2004 Apr 1|
Bibliographical noteFunding Information:
We thank Chao-Hsi Chang, G. Cvetic and M. Olsson for careful reading of the manuscript and their valuable comments. The work of C.S.K. was supported in part by CHEP-SRC Program and in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF. The work of G.W. was supported in part by BK21 Program and in part by National Natural Science Foundation of China.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics