The decay B-0s→ ψ(2S)K+π-is observed using a data set corresponding to an integrated luminosity of 3.0fb-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0→ ψ(2S)K+π-decay mode is measured to be, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0sor B0meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892)0meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be. In addition, the mass splitting between the B0sand B0mesons is measured as M(B0s)-M(B0)=87.45±0.44(stat)±0.09(syst)MeV/c2.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Observation of the decay B-0s→ ψ(2S)K+π-. PHYSICS LETTERS. SECTION B, 747, 484-494 [10.1016/j.physletb.2015.06.038].

Observation of the decay B-0s→ ψ(2S)K+π-

Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;Martinelli, M;
2015

Abstract

The decay B-0s→ ψ(2S)K+π-is observed using a data set corresponding to an integrated luminosity of 3.0fb-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0→ ψ(2S)K+π-decay mode is measured to be, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0sor B0meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892)0meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be. In addition, the mass splitting between the B0sand B0mesons is measured as M(B0s)-M(B0)=87.45±0.44(stat)±0.09(syst)MeV/c2.
Articolo in rivista - Articolo scientifico
lhcb
English
2015
747
484
494
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Observation of the decay B-0s→ ψ(2S)K+π-. PHYSICS LETTERS. SECTION B, 747, 484-494 [10.1016/j.physletb.2015.06.038].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/90860
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