We present measurements of branching fractions for five B-meson decays to two-body charmless final states. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 459 x 10(6) B (B) over bar pairs. The results for branching fractions are, in units of 10(-6) (upper limits at 90% C.L.), B(B(+) -> eta rho(+)) = 9.9 +/- 1.2 +/- 0.8, (BB(0) -> eta(')eta) = 0.5 +/- 0.4 +/- 0.1(< 1.2), B(B(0) -> eta pi(0)) = 0.9 +/- 0.4 +/- 0.1( < 1.5), B(B(0) -> eta(')pi(0)) = 0.9 +/- 0.4 +/- 0.1(< 1.5), and B(B(0) -> omega pi(0)) = 0.07 +/- 0.26 +/- 0.02(< 0.5). The first error quoted is statistical and the second systematic. For the eta rho(+) mode, we measure the charge asymmetry A(ch)(B(+) -> eta rho(+)) = 0.13 +/- 0.11 +/- 0.02.
Observation of B(+)->eta rho(+) and search for B(0) decays to eta 'eta, eta pi(0), eta 'pi(0), and omega pi(0)
LUSIANI, Alberto;
2008
Abstract
We present measurements of branching fractions for five B-meson decays to two-body charmless final states. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 459 x 10(6) B (B) over bar pairs. The results for branching fractions are, in units of 10(-6) (upper limits at 90% C.L.), B(B(+) -> eta rho(+)) = 9.9 +/- 1.2 +/- 0.8, (BB(0) -> eta(')eta) = 0.5 +/- 0.4 +/- 0.1(< 1.2), B(B(0) -> eta pi(0)) = 0.9 +/- 0.4 +/- 0.1( < 1.5), B(B(0) -> eta(')pi(0)) = 0.9 +/- 0.4 +/- 0.1(< 1.5), and B(B(0) -> omega pi(0)) = 0.07 +/- 0.26 +/- 0.02(< 0.5). The first error quoted is statistical and the second systematic. For the eta rho(+) mode, we measure the charge asymmetry A(ch)(B(+) -> eta rho(+)) = 0.13 +/- 0.11 +/- 0.02.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
