Semi-inclusive B-K(K)X decays with initial bound state effects
Journal
Physical Review D
Journal Volume
64
Journal Issue
1
Date Issued
2001
Author(s)
Abstract
The effects of the initial b quark bound state for the semi-inclusive decays B-4>K(K)X are studied using light cone expansion and heavy quark effective theory methods. We find that the initial bound state effects on the branching ratios and CP asymmetries are small. In the light cone expansion approach, the CP-averaged branching ratios are increased by about 2% with respect'to the free b-quark decay. For B°-+K~(K~)X, the CP-averaged branching ratios are sensitive to the phase y and the CP asymmetry can be as large as 7% (14%), whereas for B~->K°(K°)X the CP-averaged branching ratios are not sensitive to y and the CP asymmetries are small (<1%). The CP-averaged branching ratios are predicted to be in the ranges (0.53-1.5)X 10~4 [(0.25-2.0)X 1(T4] for B°->K~(K-)X and ( 0.77-0.84) X 10~4 [(0.67-0.74) X 10~4] for B~->K°(K°)X, depending on the value of the CP violating phase y. In the heavy quark effective theory approach, we find that the branching ratios are decreased by about 10% and the CP asymmetries are not affected. These predictions can be tested in the near future. ©2001 The American Physical Society.
Type
journal article