We present measurements of the branching fractions longitudinal polarization and direct CP-violation asymmetries for the decays B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) with a sample of (467 +/- 5) x 10(6)B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at the SLAC National Accelerator Laboratory. We observe B(+) -> rho(0)K*(+) with a significance of 5: 3 sigma and measure the branching fraction B(B(+) -> rho(0)K*(+)) = (4.6 +/- 1.0 +/- 0.4) x 10(-6) the longitudinal polarization f(L) = 0.78 +/- 0.12 +/- 0.03 and the CP-violation asymmetry A(CP) = 0.31 +/- 0.13 +/- 0.03. We observe B(+) -> f(0)(980)K*(+) and measure the branching fraction B(B(+) -> f(0)(980)K*(+)) x B(f(0)(980) -> pi(+)pi(-)) = (4.2 +/- 0.6 +/- 0.3) x 10(-6) and the CP-violation asymmetry A(CP) = 0.15 +/- 0.12 +/- 0.03. The first uncertainty quoted is statistical and the second is systematic.
Measurements of branching fractions polarizations and direct CP-violation asymmetries in B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) decays
ANDREOTTI, Mirco;BETTONI, Diego;BOZZI, Concezio;CALABRESE, Roberto;CECCHI, Annalisa;CIBINETTO, Gianluigi;FIORAVANTI, Elisa;FRANCHINI, Paolo;GARZIA, Isabella;LUPPI, Eleonora;MUNERATO, Mauro;NEGRINI, Matteo;PETRELLA, Antonio;PIEMONTESE, Livio;
2011
Abstract
We present measurements of the branching fractions longitudinal polarization and direct CP-violation asymmetries for the decays B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) with a sample of (467 +/- 5) x 10(6)B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at the SLAC National Accelerator Laboratory. We observe B(+) -> rho(0)K*(+) with a significance of 5: 3 sigma and measure the branching fraction B(B(+) -> rho(0)K*(+)) = (4.6 +/- 1.0 +/- 0.4) x 10(-6) the longitudinal polarization f(L) = 0.78 +/- 0.12 +/- 0.03 and the CP-violation asymmetry A(CP) = 0.31 +/- 0.13 +/- 0.03. We observe B(+) -> f(0)(980)K*(+) and measure the branching fraction B(B(+) -> f(0)(980)K*(+)) x B(f(0)(980) -> pi(+)pi(-)) = (4.2 +/- 0.6 +/- 0.3) x 10(-6) and the CP-violation asymmetry A(CP) = 0.15 +/- 0.12 +/- 0.03. The first uncertainty quoted is statistical and the second is systematic.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
