We report the measurement of the branching fractions of the rare decays B(0)-> D(s)((*)+)pi(-), B(0)-> D(s)((*)+)rho(-), and B(0)-> D(s)((*)-)K((*)+) in a sample of 381x10(6)Upsilon(4S) decays into B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) storage ring. We present evidence for the decay B(0)-> D(s)(-)K(*+) and the vector-vector decays B(0)-> D(s)(*+)rho(-) and B(0)-> D(s)(*-)K(*+), as well as the first measurement of the vector meson polarization in these decays. We also determine the ratios of the CKM-suppressed to CKM-favored amplitudes r(D((*))pi) and r(D((*))rho) in decays B(0)-> D((*)+/-)pi(-/+) and B(0)-> D((*)+/-)rho(-/+), and comment on the prospects for measuring the CP observable sin(2 beta+gamma).
Measurement of the branching fractions of the rare decays B(0)-> D(s)((*)+)pi(-), B(0)-> D(s)((*)+)rho(-), and B(0)-> D(s)((*)-)K((*)+) RID C-5223-2009
CALDERINI, GIOVANNI;ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2008-01-01
Abstract
We report the measurement of the branching fractions of the rare decays B(0)-> D(s)((*)+)pi(-), B(0)-> D(s)((*)+)rho(-), and B(0)-> D(s)((*)-)K((*)+) in a sample of 381x10(6)Upsilon(4S) decays into B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) storage ring. We present evidence for the decay B(0)-> D(s)(-)K(*+) and the vector-vector decays B(0)-> D(s)(*+)rho(-) and B(0)-> D(s)(*-)K(*+), as well as the first measurement of the vector meson polarization in these decays. We also determine the ratios of the CKM-suppressed to CKM-favored amplitudes r(D((*))pi) and r(D((*))rho) in decays B(0)-> D((*)+/-)pi(-/+) and B(0)-> D((*)+/-)rho(-/+), and comment on the prospects for measuring the CP observable sin(2 beta+gamma).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
