We report observations of the b→d penguin-dominated decays B+→K̄0K+ and B0→K0K̄0 in 316fb-1 of e+e- collision data collected with the BABAR detector. We measure the branching fractions B(B+→K̄0K+)=(1.61±0.44±0.09)×10-6 and B(B0→K0K̄0)=(1.08±0.28±0.11)×10-6 and the CP-violating charge asymmetry ACP(K̄0K+)=0.10±0.26±0.03. Using a vertexing technique previously employed in several analyses of all-neutral final states containing kaons, we report the first measurement of time-dependent CP-violating asymmetries in B0→KS0KS0, obtaining S=-1.28-0.73-0.16+0.80+0.11 and C=-0.40±0.41±0.06. We also report improved measurements of the branching fraction B(B+→K0π+)=(23. 9±1.1±1.0)×10-6 and CP-violating charge asymmetry ACP(K0π+)=-0.029±0.039±0.010.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Observation of B+→K̄0K+ and B0→K0K̄0. PHYSICAL REVIEW LETTERS, 97(17) [10.1103/PhysRevLett.97.171805].

Observation of B+→K̄0K+ and B0→K0K̄0

CARPINELLI, Massimo;
2006

Abstract

We report observations of the b→d penguin-dominated decays B+→K̄0K+ and B0→K0K̄0 in 316fb-1 of e+e- collision data collected with the BABAR detector. We measure the branching fractions B(B+→K̄0K+)=(1.61±0.44±0.09)×10-6 and B(B0→K0K̄0)=(1.08±0.28±0.11)×10-6 and the CP-violating charge asymmetry ACP(K̄0K+)=0.10±0.26±0.03. Using a vertexing technique previously employed in several analyses of all-neutral final states containing kaons, we report the first measurement of time-dependent CP-violating asymmetries in B0→KS0KS0, obtaining S=-1.28-0.73-0.16+0.80+0.11 and C=-0.40±0.41±0.06. We also report improved measurements of the branching fraction B(B+→K0π+)=(23. 9±1.1±1.0)×10-6 and CP-violating charge asymmetry ACP(K0π+)=-0.029±0.039±0.010.
Articolo in rivista - Articolo scientifico
Electric charge; Electron energy levels; Time measurement; Branching fraction; Charge asymmetry; Kaons; Plusmn; Elementary particles;
English
2006
97
17
171805
none
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Observation of B+→K̄0K+ and B0→K0K̄0. PHYSICAL REVIEW LETTERS, 97(17) [10.1103/PhysRevLett.97.171805].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389731
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