We present measurements of branching fractions and charge asymmetries for the decays B ->eta K(*), where K(*) indicates a spin 0, 1, or 2 K pi system. The data sample corresponds to 344x10(6) B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We measure the branching fractions (in units of 10(-6)): B(B(0)->eta K(*0)(892))=16.5 +/- 1.1 +/- 0.8, B(B(+)->eta K(*+)(892))=18.9 +/- 1.8 +/- 1.3, B(B(0)->eta(K pi)(0)(*0))=11.0 +/- 1.6 +/- 1.5, B(B(+)->eta(K pi)(0)(*+))=18.2 +/- 2.6 +/- 2.6, B(B(0)->eta K(2)(*0)(1430))=9.6 +/- 1.8 +/- 1.1, and B(B(+)->eta K(2)(*+)(1430))=9.1 +/- 2.7 +/- 1.4. We also determine the charge asymmetries for all decay modes.
Measurement of branching fractions and charge asymmetries in B decays to an eta meson and a K(*) meson RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009
ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CALDERINI, GIOVANNI;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2006-01-01
Abstract
We present measurements of branching fractions and charge asymmetries for the decays B ->eta K(*), where K(*) indicates a spin 0, 1, or 2 K pi system. The data sample corresponds to 344x10(6) B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We measure the branching fractions (in units of 10(-6)): B(B(0)->eta K(*0)(892))=16.5 +/- 1.1 +/- 0.8, B(B(+)->eta K(*+)(892))=18.9 +/- 1.8 +/- 1.3, B(B(0)->eta(K pi)(0)(*0))=11.0 +/- 1.6 +/- 1.5, B(B(+)->eta(K pi)(0)(*+))=18.2 +/- 2.6 +/- 2.6, B(B(0)->eta K(2)(*0)(1430))=9.6 +/- 1.8 +/- 1.1, and B(B(+)->eta K(2)(*+)(1430))=9.1 +/- 2.7 +/- 1.4. We also determine the charge asymmetries for all decay modes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.