Search for CP violation in B+/- --> J/psiK+/- and B+/- --> psi(2S)K+/- decays

G Bonvicini; D Cinabro; S McGee; L P Perera; G J Zhou; E Lipeles; S Pappas; M Schmidtler; A Shapiro; W M Sun; A J Weinstein; D E Jaffe; G Masek; H P Paar; E M Potter; S Prell; V Sharma; D M Asner; A Eppich; T S Hill; R J Morrison; H N Nelson; R A Briere; B H Behrens; W T Ford; A Gritsan; J Roy; J G Smith; J P Alexander; R Baker; C Bebek; B E Berger; K Berkelman; F Blanc; V Boisvert; D G Cassel; M Dickson; P S Drell; K M Ecklund; R Ehrlich; A D Foland; P Gaidarev; L Gibbons; B Gittelman; S W Gray; D L Hartill; B K Heltsley; P I Hopman; C D Jones

doi:10.1103/PhysRevLett.84.5940

Search for CP violation in B+/- --> J/psiK+/- and B+/- --> psi(2S)K+/- decays

Phys Rev Lett. 2000 Jun 26;84(26 Pt 1):5940-4. doi: 10.1103/PhysRevLett.84.5940.

Affiliation

¹ Wayne State University, Detroit, Michigan 48202, USA.

PMID: 10991094
DOI: 10.1103/PhysRevLett.84.5940

Abstract

We present a search for direct CP violation in B+/--->J/psiK+/- and B+/--->psi(2S)K+/- decays. In a sample of 9.7x10(6) B&Bmacr; meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+/--->J/psiK+/- and 120 B+/--->psi(2S)K+/- decays with very low background. We have measured the CP-violating charge asymmetry to be [+1.8+/-4.3(stat)+/-0.4(syst)]% for B+/--->J/psiK+/- and [+2.0+/-9. 1(stat)+/-1.0(syst)]% for B+/--->psi(2S)K+/-.