To the origin of the difference of FSI phases in B to pi pi and B to rho rho decays - Mikhail VYSOTSKY ITEP Moscou

jeudi 15 févr. 2007, 16:30 → 18:00 Europe/Paris

LPNHE, Jussieu tour 33 RdC, Salle Bernard Grossete

Didier Lacour

To the origin of the difference of FSI phases in B to pi pi and B to rho rho decays - Mikhail VYSOTSKY ITEP Moscou Naive expectation of the color suppression of $B_d\\to\\pi^0\\pi^0$ and $B_d\\to\\rho^0\\rho^0$ decay probabilities is valid in the second case but is invalid in the first one. The reason is the large FSI phase difference between the tree amplitudes of $B\\to\\pi\\pi$ decays with $I=0$ and $I=2$. The FSI model is suggested which explains why this phase difference is large in the $B_d\\to\\pi\\pi$ channel and is considerably smaller in the $B_d\\to\\rho\\rho$ one. CPV asymmetries are considered as well.