Branching ratio and CP asymmetry for B{yields}1{sup 1}P{sub 1}{gamma} decays
- National Centre for Physics and Department of Physics, Quaid-i-Azam University, Islamabad (Pakistan)
We calculate the branching ratios for B{yields}(b{sub 1},h{sub 1}){gamma} at next-to-leading order (NLO) of {alpha}{sub s} where b{sub 1} and h{sub 1} are the corresponding orbitally excited axial vector mesons of {rho} and {omega} respectively. Using the SU(3) symmetry for the form factors, the branching ratio for B{yields}(b{sub 1},h{sub 1}){gamma} is expressed in terms of the branching ratio of the B{yields}K{sub 1}{gamma} and it is found to be B(B{yields}b{sub 1}{gamma})=0.53x10{sup -6} and B(B{yields}h{sub 1}{gamma})=0.51x10{sup -6}. We also calculate direct CP-asymmetry for these decays and find that its typical values lies around 11% and is negative like {rho} and {omega} in the standard model. The predicted value of CP-asymmetry, in confirmity with the observations made in the literature, is scale dependent which has also been discussed in detail.
- OSTI ID:
- 21010980
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevD.75.034004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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