Nonperturbative charming penguin contributions to isospin asymmetries in radiativedecays
- 24 September 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 78 (5)
- https://doi.org/10.1103/physrevd.78.054024
Abstract
Recent experimental data on the radiative decays B -> V gamma, where V is a light vector meson, find small isospin violation in B -> K*gamma while isospin asymmetries in B -> 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(b)), also including O(nu alpha(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 -> V gamma modes. We also consider the effect of the NPCP on the branching ratio and CP asymmetries in B-+/- -> V-+/-gamma.All Related Versions
This publication has 39 references indexed in Scilit:
- Towards B→Vγ decays at NNLO in SCETThe European Physical Journal C, 2008
- Branching Fraction Measurements of , , andPhysical Review Letters, 2007
- Review of Particle PhysicsJournal of Physics G: Nuclear and Particle Physics, 2006
- Factorization indecaysPhysical Review D, 2005
- Measurement of branching fractions andand isospin asymmetries forPhysical Review D, 2004
- Measurement of thebranching fractions and asymmetriesPhysical Review D, 2004
- Rare radiative exclusiveBdecays in soft-collinear effective theoryPhysical Review D, 2003
- Branching ratios for $B \to K^* \gamma$ and $B \to \rho \gamma$ decays in next-to-leading order in the Large Energy Effective TheoryThe European Physical Journal C, 2002
- The radiative decays B→Vγ at next-to-leading order in QCDNuclear Physics B, 2001
- Study of Exclusive RadiativeMeson DecaysPhysical Review Letters, 2000