Branching fraction and charge asymmetry measurements in B -> J/psi pi pi decays

作者：Aubert B^*; Bona M; Boutigny D; Karyotakis Y; Lees J P; Poireau V; Prudent X; Tisserand V; Zghiche A; Tico J Garra; Grauges E; Lopez L; Palano A; Eigen G; Ofte I; Stugu B; Sun L; Abrams G S; Battaglia M; Brown D N; Button Shafer J; Cahn R N; Groysman Y; Jacobsen R G; Kadyk J A; Kerth L T; Kolomensky Yu G; Kukartsev G; Pegna D Lopes; Lynch G; Mir M; Orimoto T J; Pripstein M; Roe N A; Ronan M T; Tackmann K

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, 76(3): 031101.

DOI：10.1103/PhysRevD.76.031101

We study the decays B-0 -> J/psi pi(+)pi(-) and B+-> J/psi pi(+)pi(0), including intermediate resonances, using a sample of 382x10(6) B (B) over bar pairs recorded by the BABAR detector at the PEP-II e(+)e(-) B factory. We measure the branching fractions B(B-0 -> J/psi rho(0))=(2.7 +/- 0.3 +/- 0.2)x10(-5) and B(B+-> J/psi rho(+))=(5.0 +/- 0.7 +/- 0.3)x10(-5). We also set the following upper limits at the 90% confidence level: B(B-0 -> J/psi pi(+)pi(-) nonresonant)< 1.2x10(-5), B(B-0 -> J/psi f(2))< 4.6x10(-6), and B(B+-> J/psi pi(+)pi(0) nonresonant)< 7.3x10(-6). We measure the charge asymmetry in charged B decays to J/psi rho to be -0.11 +/- 0.12 +/- 0.08.

• 出版日期2007-8
• 单位Perugia; 中国地震局; McGill; 中国科学院高能物理研究所