Measurements of the branching fractions and CP asymmetries of B±→J/ψπ± and B±→ψ(2S)π± decays
Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P. (2012) Measurements of the branching fractions and CP asymmetries of B±→J/ψπ± and B±→ψ(2S)π± decays. Physical Review D (Particles, Fields, Gravitation and Cosmology), Volume 85 (Number 9). Article Number 091105(R). ISSN 1550-7998
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Official URL: http://dx.doi.org/10.1103/PhysRevD.85.091105
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. 011 and ACPψ(2S)π=0.048±0.090±0.011 with no evidence of direct CP violation seen.
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