We present branching fraction measurements for the radiative decays B(+)-> rho(+)gamma, B(0) -> rho(0)gamma, and B(0) -> omega gamma. The analysis is based on a data sample of 465 X 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B(+) -> rho(+)gamma) = (1.20(-0.37)(+0.42) +/- 0.20) X 10(-6), B(B(0) -> rho(0)gamma) = (0.97(-0.22)(+0.24) +/- 0.06) X 10(-6), and a 90% C.L. upper limit B(B(0) -> omega gamma) < 0.9 X 10(-6), where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Gamma(B(+) -> rho(+)gamma)/2 Gamma(B(0) -> rho(0)gamma) - 1 = -0.43 (+0.25)(-0.22) +/- 0.10.
Measurements of branching fractions for B(+) -> rho(+)gamma, B(0) -> rho(0)gamma, and B(0) -> omega gamma RID C-5223-2009
ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2008-01-01
Abstract
We present branching fraction measurements for the radiative decays B(+)-> rho(+)gamma, B(0) -> rho(0)gamma, and B(0) -> omega gamma. The analysis is based on a data sample of 465 X 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B(+) -> rho(+)gamma) = (1.20(-0.37)(+0.42) +/- 0.20) X 10(-6), B(B(0) -> rho(0)gamma) = (0.97(-0.22)(+0.24) +/- 0.06) X 10(-6), and a 90% C.L. upper limit B(B(0) -> omega gamma) < 0.9 X 10(-6), where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Gamma(B(+) -> rho(+)gamma)/2 Gamma(B(0) -> rho(0)gamma) - 1 = -0.43 (+0.25)(-0.22) +/- 0.10.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
