A study of B±→J/ψπ± and B±→ψ(2S)π± decays is performed with data corresponding to 0.37 fb-1 of proton-proton collisions at √s=7 TeV. Their branching fractions are found to be B(B±→J/ψπ±)=(3.88±0.11±0.15)×10-5 and B(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.
Measurements of the branching fractions and CP asymmetries of B^{±}→J/ψπ^{±} and B^{±}→ψ(2S)π^{±} decays
R. Cardinale;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2012-01-01
Abstract
A study of B±→J/ψπ± and B±→ψ(2S)π± decays is performed with data corresponding to 0.37 fb-1 of proton-proton collisions at √s=7 TeV. Their branching fractions are found to be B(B±→J/ψπ±)=(3.88±0.11±0.15)×10-5 and B(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.File in questo prodotto:
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