GLUONIC ENHANCEMENTS IN NON-SPECTATOR BEAUTY DECAYS - AN INCLUSIVE MIRAGE THOUGH AN EXCLUSIVE POSSIBILITY

被引:102
作者
BIGI, II [1 ]
URALTSEV, NG [1 ]
机构
[1] ST PETERSBURG NUCL PHYS INST,188350 ST PETERSBURG,USSR
关键词
D O I
10.1016/0370-2693(92)90066-D
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It has been claimed that gluon emission can raise weak annihilation contributions to heavy quark decays by powers of (m(Q)/mu(had)), the ratio of the heavy quark mass to a light hadron mass scale. We show that such powerlike enhancements of annihilation, interference and other preasymptotic effects do not arise for fully inclusive transitions, only for partial rates. The leading corrections are then logarithmic; even so they are crucial for determining the impact of these effects. We establish a non-trivial relation between euclidean renormalization and real decay processes in Minkowski space. Phenomenological consequences are briefly discussed, e.g. we expect the B(d) and B- lifetimes to differ by only a few percent with interference being the main driving force. The (hybrid) log corrections are essential for the degree of interference by effectively cancelling non-leading terms in a 1/N(c) expansion.
引用
收藏
页码:271 / 280
页数:10
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