Observation of B{sup +}{yields}K{sup 0}K{sup +} and B{sup 0}{yields}K{sup 0}K{sup 0}

Journal Article · Fri Oct 27 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.171805· OSTI ID:20861038

Aubert, B; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I; Stugu, B ^[5]; Abrams, G S ^[6]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We report observations of the b{yields}d penguin-dominated decays B{sup +}{yields}K{sup 0}K{sup +} and B{sup 0}{yields}K{sup 0}K{sup 0} in 316 fb{sup -1} of e{sup +}e{sup -} collision data collected with the BABAR detector. We measure the branching fractions B(B{sup +}{yields}K{sup 0}K{sup +})=(1.61{+-}0.44{+-}0.09)x10{sup -6} and B(B{sup 0}{yields}K{sup 0}K{sup 0})=(1.08{+-}0.28{+-}0.11)x10{sup -6} and the CP-violating charge asymmetry A{sub CP}(K{sup 0}K{sup +})=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 B{sup 0}{yields}K{sub S}{sup 0}K{sub S}{sup 0}, obtaining S=-1.28{sub -0.73-0.16}{sup +0.80+0.11} and C=-0.40{+-}0.41{+-}0.06. We also report improved measurements of the branching fraction B(B{sup +}{yields}K{sup 0}{pi}{sup +})=(23.9{+-}1.1{+-}1.0)x10{sup -6} and CP-violating charge asymmetry A{sub CP}(K{sup 0}{pi}{sup +})=-0.029{+-}0.039{+-}0.010.

• OSTI ID: 20861038
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
B PLUS MESONS
BRANCHING RATIO
CP INVARIANCE
ELECTRON-POSITRON COLLISIONS
ELECTRONS
KAONS NEUTRAL
PAIR PRODUCTION
PARTICLE DECAY
PIONS PLUS
POSITRONS
TIME DEPENDENCE