Measurements of the branching fractions and CP asymmetries of B-+/- -> J/psi pi(+/-) and B-+/- -> psi(2S)pi(+/-) decays

Journal article

A study of B ±→J/ψπ ± and B ±→ψ(2S)π ± decays is performed with data corresponding to 0.37fb -1 of proton-proton collisions at √s=7TeV. Their branching fractions are found to be B(B ±→J/ψπ ±)=(3.88±0. 11±0.15)×10 -5andB(B ±→ψ(2S) π ±)=(2.52±0.26±0.15)×10 -5,where the first uncertainty is related to the statistical size of the sample and the second quantifies systematic effects. The measured CP asymmetries in these modes are ACPJ/ψπ=0.005±0.027±0. 011andACPψ(2S)π=0.048±0.090±0.011 with no evidence of direct CP violation seen. © 2012 CERN.

Authors: Aaij, R; Abellan Beteta, C; Adeva, B; Adinolfi, M; Adrover, C

• Publication status: Published
• Journal: Physical Review D
• Volume: 85
• Issue: 9
• Publication date: 2012-05-07
• DOI: 10.1103/PhysRevD.85.091105
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English