A study of B-+/- -> J/psi pi(+/-) and B-+/- -> psi(2S)pi(+/-) decays is performed with data corresponding to 0.37 fb(-1) of proton-proton collisions at root s = 7 TeV. Their branching fractions are found to be B(B-+/- -> J/psi pi(+/-)) = (3.88 +/- 0.11 +/- 0.15) x 10(-5) and B(B-+/- -> psi(2S)pi(+/-)) = (2.52 +/- 0.26 +/- 0.15) x 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 A(CP)(J/psi pi) = 0.005 +/- 0.027 +/- 0.011 and A(CP)(psi(2S)pi) = 0.048 +/- 0.090 +/- 0.011 with no evidence of direct CP violation seen.

Aaij, R., Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2012). Measurements of the branching fractions and CP asymmetries of B-+/- -> J/psi pi(+/-) and B-+/- -> psi(2S)pi(+/-) decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85(9) [10.1103/PhysRevD.85.091105].

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

CALVI, MARTA;KUCHARCZYK, MARCIN;Martinelli, M;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIO;
2012

Abstract

A study of B-+/- -> J/psi pi(+/-) and B-+/- -> psi(2S)pi(+/-) decays is performed with data corresponding to 0.37 fb(-1) of proton-proton collisions at root s = 7 TeV. Their branching fractions are found to be B(B-+/- -> J/psi pi(+/-)) = (3.88 +/- 0.11 +/- 0.15) x 10(-5) and B(B-+/- -> psi(2S)pi(+/-)) = (2.52 +/- 0.26 +/- 0.15) x 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 A(CP)(J/psi pi) = 0.005 +/- 0.027 +/- 0.011 and A(CP)(psi(2S)pi) = 0.048 +/- 0.090 +/- 0.011 with no evidence of direct CP violation seen.
Articolo in rivista - Articolo scientifico
Heavy Flavour Physics; LHC Collider
English
Aaij, R., Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2012). Measurements of the branching fractions and CP asymmetries of B-+/- -> J/psi pi(+/-) and B-+/- -> psi(2S)pi(+/-) decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85(9) [10.1103/PhysRevD.85.091105].
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