Semi-inclusive B{r_arrow}K(K{sup *})X decays with initial bound state effects
The effects of the initial b quark bound state for the semi-inclusive decays B{r_arrow}K(K{sup *})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 {bar B}{sup 0}{r_arrow}K{sup {minus}}(K{sup *{minus}})X, the CP-averaged branching ratios are sensitive to the phase {gamma} and the CP asymmetry can be as large as 7% (14%), whereas for B{sup {minus}}{r_arrow}{bar K}{sup 0}({bar K}{sup *0})X the CP-averaged branching ratios are not sensitive to {gamma} and the CP asymmetries are small ({lt}1%). The CP-averaged branching ratios are predicted to be in the ranges (0.53{endash}1.5){times}10{sup {minus}4} [(0.25{endash}2.0){times}10{sup {minus}4}] for {bar B}{sup 0}{r_arrow}K{sup {minus}}(K{sup *{minus}})X and (0.77{endash}0.84){times}10{sup {minus}4} [(0.67{endash}0.74){times}10{sup {minus}4}] for B{sup {minus}}{r_arrow}{bar K}{sup 0}({bar K}{sup *0})X, depending on the value of the CP violating phase {gamma}. 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.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204461
- Journal Information:
- Physical Review D, Vol. 64, Issue 1; Other Information: DOI: 10.1103/PhysRevD.64.014020; Othernumber: PRVDAQ000064000001014020000001; 071113PRD; PBD: 1 Jul 2001; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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