TY - JOUR
T1 - Extrapolating SU(3) breaking from D to B decays
AU - Gronau, Michael
AU - Pirjol, Dan
PY - 2000/10/1
Y1 - 2000/10/1
N2 - We consider two SU(3) breaking parameters R1(mB) and R2(mB) appearing in a relation between B+ →Kπ and B+→ππ amplitudes, which plays an important role in determining the weak phase γ. In the heavy quark limit, we identify an isospin-related quantity R2(mD) measured in D decays, exhibiting large SU(3) breaking which is likely due to nonfactorizable effects. Applying heavy quark symmetry to semileptonic D and B decay form factors, we find that factorizable SU(3) breaking in R2(mB)/R1(mB) may be significantly larger than estimated from certain model calculations of form factors.
AB - We consider two SU(3) breaking parameters R1(mB) and R2(mB) appearing in a relation between B+ →Kπ and B+→ππ amplitudes, which plays an important role in determining the weak phase γ. In the heavy quark limit, we identify an isospin-related quantity R2(mD) measured in D decays, exhibiting large SU(3) breaking which is likely due to nonfactorizable effects. Applying heavy quark symmetry to semileptonic D and B decay form factors, we find that factorizable SU(3) breaking in R2(mB)/R1(mB) may be significantly larger than estimated from certain model calculations of form factors.
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U2 - 10.1103/PhysRevD.62.077301
DO - 10.1103/PhysRevD.62.077301
M3 - Article
AN - SCOPUS:18244365357
SN - 0556-2821
VL - 62
SP - 1
EP - 4
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 077301
ER -