We present measurements of branching fractions and CP-violating asymmetries in decays of B mesons to two-body final states containing a K0. The results are based on a data sample of approximately 88×10^6 Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+→K0π+)=(22.3±1.7±1.1)×10-6, B(B0→K0π0)=(11.4±1.7±0.8)×10-6, B(B+→K̅ 0K+)<2.5×10-6, and B(B0→K0K̅ 0)<1.8×10-6, where the first uncertainty is statistical and the second is systematic, and the upper limits are at the 90% confidence level. In addition, the following CP-violating asymmetries have been measured: ACP(B+→K0π+)=-0.05±0.08±0.01 and ACP(B0→K0π0)=0.03±0.36±0.11.
Measurements of branching fractions and CP-violating asymmetries in B meson decays to charmless two-body states containing a K-0
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
We present measurements of branching fractions and CP-violating asymmetries in decays of B mesons to two-body final states containing a K0. The results are based on a data sample of approximately 88×10^6 Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+→K0π+)=(22.3±1.7±1.1)×10-6, B(B0→K0π0)=(11.4±1.7±0.8)×10-6, B(B+→K̅ 0K+)<2.5×10-6, and B(B0→K0K̅ 0)<1.8×10-6, where the first uncertainty is statistical and the second is systematic, and the upper limits are at the 90% confidence level. In addition, the following CP-violating asymmetries have been measured: ACP(B+→K0π+)=-0.05±0.08±0.01 and ACP(B0→K0π0)=0.03±0.36±0.11.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
