The decay anti-B0s → ψ(2S) K+ π− is observed using a data set corresponding to an integrated luminosity of 3.0 fb^−1 collected 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 B(anti-B0s → ψ(2S) K+ π−)/B(B0 → ψ(2S) K+ π−) = 5.38 ± 0.36(stat) ± 0.22(syst) ± 0.31(f_s/f_d)%, where f_s/f_d indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0s or B0 meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K⁎(892)0 meson 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 B(anti-B0s → ψ(2S) K⁎(892)0)/B(B0 → ψ(2S) K⁎(892)0) = 5.58 ± 0.57(stat) ± 0.40(syst) ± 0.32(f_s/f_d)%. In addition, the mass splitting between the B0s and B0 mesons is measured as M(B0s) − M(B0) = 87.45 ± 0.44(stat) ± 0.09(syst) MeV/c^2.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Observation of the Decay anti-B0s → ψ(2S) K+ π−. PHYSICS LETTERS. SECTION B, 747, 484-494 [10.1016/j.physletb.2015.06.038].

Observation of the Decay anti-B0s → ψ(2S) K+ π−

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The decay anti-B0s → ψ(2S) K+ π− is observed using a data set corresponding to an integrated luminosity of 3.0 fb^−1 collected 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 B(anti-B0s → ψ(2S) K+ π−)/B(B0 → ψ(2S) K+ π−) = 5.38 ± 0.36(stat) ± 0.22(syst) ± 0.31(f_s/f_d)%, where f_s/f_d indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0s or B0 meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K⁎(892)0 meson 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 B(anti-B0s → ψ(2S) K⁎(892)0)/B(B0 → ψ(2S) K⁎(892)0) = 5.58 ± 0.57(stat) ± 0.40(syst) ± 0.32(f_s/f_d)%. In addition, the mass splitting between the B0s and B0 mesons is measured as M(B0s) − M(B0) = 87.45 ± 0.44(stat) ± 0.09(syst) MeV/c^2.
2015
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Observation of the Decay anti-B0s → ψ(2S) K+ π−. PHYSICS LETTERS. SECTION B, 747, 484-494 [10.1016/j.physletb.2015.06.038].
Aaij, R; Adeva, B; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/514978
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