Nonperturbative charming penguin contributions to isospin asymmetries in radiative B decays
- Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
- Department of Physics and Astronomy, University of Pittsburgh, Pennsylvania 15260 (United States)
Recent experimental data on the radiative decays B{yields}V{gamma}, where V is a light vector meson, find small isospin violation in B{yields}K*{gamma} while isospin asymmetries in B{yields}{rho}{gamma} are of order 20%, with large uncertainties. Using soft-collinear effective theory, we calculate isospin asymmetries in these radiative B decays up to O(1/m{sub b}), also including O(v{alpha}{sub s}) contributions from nonperturbative charming penguins (NPCP). In the absence of NPCP contributions, the theoretical predictions for the asymmetries are a few percent or less. Including the NPCP can significantly increase the isospin asymmetries for both B{yields}V{gamma} modes. We also consider the effect of the NPCP on the branching ratio and CP asymmetries in B{sup {+-}}{yields}V{sup {+-}}{gamma}.
- OSTI ID:
- 21250732
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 5; Other Information: DOI: 10.1103/PhysRevD.78.054024; (c) 2008 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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