We present measurements of the B→η′K branching fractions; for B+→η′K+ we measure also the time-integrated charge asymmetry Ach, and for B0→η′KS0 the time-dependent CP-violation parameters S and C. The data sample corresponds to 232×106 BB̄ pairs produced by e+e- annihilation at the Υ(4S). The results are B(B→η′K+)= (68.9±2.0±3.2)×10-6, B(B0→η′K0)=(67. 4±3.3±3.2)×10-6, Ach=0.033±0.028±0.005, S=0.30±0.14±0.02, and C=-0.21±0.10±0.02, where the first error quoted is statistical and the second is systematic.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η′K decays. PHYSICAL REVIEW LETTERS, 94(19) [10.1103/PhysRevLett.94.191802].

Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η′K decays

CARPINELLI, Massimo;
2005

Abstract

We present measurements of the B→η′K branching fractions; for B+→η′K+ we measure also the time-integrated charge asymmetry Ach, and for B0→η′KS0 the time-dependent CP-violation parameters S and C. The data sample corresponds to 232×106 BB̄ pairs produced by e+e- annihilation at the Υ(4S). The results are B(B→η′K+)= (68.9±2.0±3.2)×10-6, B(B0→η′K0)=(67. 4±3.3±3.2)×10-6, Ach=0.033±0.028±0.005, S=0.30±0.14±0.02, and C=-0.21±0.10±0.02, where the first error quoted is statistical and the second is systematic.
Articolo in rivista - Articolo scientifico
Electrons; Error analysis; Statistical methods; Branching fractions; CP-violation parameters; High energy physics;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η′K decays. PHYSICAL REVIEW LETTERS, 94(19) [10.1103/PhysRevLett.94.191802].
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