On measuring the kinetic energy of the heavy quark inside B mesons
On measuring the kinetic energy of the heavy quark inside B mesons
复制标题
B介子内重夸克动能的测量
DOI：
10.1016/0370-2693(94)91149-5
复制
发表时间：
1994
影响因子：
4.4
通讯作者：
A. Vainshtein
中科院分区：
文献类型：
--
作者：
I. Bigi;A. Grozin;M. Shifman;N. Uraltsev;A. Vainshtein
We discuss how one can determine the average kinetic energy of the heavy quark inside heavy mesons from differential distributions indecays. A new, so-called third, sum rule for thetransition is derived in the small velocity (SV) limit. Using this sum rule and the existing data on the momentum dependence in thetransition (the slope of the Isgur-Wise function) we obtain a new lower bound on the parameterproportional to the average kinetic energy ofquark insidemeson. The existing data suggest~GeVand (from the ``optical'' sum rule)MeV, albeit with some numerical uncertainties.
