TY - JOUR
T1 - Nonperturbative charming penguin contributions to isospin asymmetries in radiative B decays
AU - Kim, Chul
AU - Leibovich, Adam K.
AU - Mehen, Thomas
PY - 2008/9/24
Y1 - 2008/9/24
N2 - Recent experimental data on the radiative decays B→Vγ, where V is a light vector meson, find small isospin violation in B→K*γ while isospin asymmetries in B→ργ 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/mb), also including O(vαs) 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→Vγ modes. We also consider the effect of the NPCP on the branching ratio and CP asymmetries in B±→ V±γ.
AB - Recent experimental data on the radiative decays B→Vγ, where V is a light vector meson, find small isospin violation in B→K*γ while isospin asymmetries in B→ργ 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/mb), also including O(vαs) 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→Vγ modes. We also consider the effect of the NPCP on the branching ratio and CP asymmetries in B±→ V±γ.
UR - https://www.scopus.com/pages/publications/53349153627
U2 - 10.1103/PhysRevD.78.054024
DO - 10.1103/PhysRevD.78.054024
M3 - Article
AN - SCOPUS:53349153627
SN - 1550-7998
VL - 78
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 054024
ER -