We perform amplitude analyses of the decays B0→K +K -KS0, B +→K +K -K +, ; B +→KS0KS0K +, ; measure CP-violating parameters ; partial branching fractions. The results are based on a data sample of approximately 470×106 BB̄ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory. For B +→K +K -K +, we find a direct CP asymmetry in B +→(1020)K + of A CP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K +K -KS0, we measure the CP-violating phase β eff((1020)KS0)=(21±6±2)°. For B +→KS0KS0K +, we measure an overall direct CP asymmetry of A CP=(4-5+4±2)%. We also perform an angular-moment analysis of the three channels ; determine that the f X(1500) state can be described well by the sum of the resonances f 0(1500), f2′(1525), ; f 0(1710). © 2012 American Physical Society.
Study of CP violation in Dalitz-plot analyses of B0→K+K-KS0, B+→K+K-K+, ; B+→KS0KS0K+
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2012-01-01
Abstract
We perform amplitude analyses of the decays B0→K +K -KS0, B +→K +K -K +, ; B +→KS0KS0K +, ; measure CP-violating parameters ; partial branching fractions. The results are based on a data sample of approximately 470×106 BB̄ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory. For B +→K +K -K +, we find a direct CP asymmetry in B +→(1020)K + of A CP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K +K -KS0, we measure the CP-violating phase β eff((1020)KS0)=(21±6±2)°. For B +→KS0KS0K +, we measure an overall direct CP asymmetry of A CP=(4-5+4±2)%. We also perform an angular-moment analysis of the three channels ; determine that the f X(1500) state can be described well by the sum of the resonances f 0(1500), f2′(1525), ; f 0(1710). © 2012 American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.