A measurement of the ratio of the branching fractions of the Bs0 meson to J/ψf0(980) and to J/ψφ(1020) is presented. The J/ψ, f0(980), and φ(1020) are observed through their decays to μ+μ-, π+π-, and K+K-, respectively. The f0 and the φ are identified by requiring |Mπ+π--974 MeV|<50 MeV and |MK+K--1020 MeV|<10 MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7 TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3 fb-1. The measured ratio is B(Bs0→J/ψf0)B(f0→π+π-)/B(Bs0→J/ψφ)B(φ→K+K-) = 0.140±0.008(stat) ± 0.023(syst), where the first uncertainty is statistical and the second is systematic.

Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2016). Measurement of the ratio B(Bs0 → J/ψf0(980))/B(Bs0 → J/ψφ(1020)) in pp collisions at √s=7 TeV. PHYSICS LETTERS. SECTION B, 756, 84-102 [10.1016/j.physletb.2016.02.047].

Measurement of the ratio B(Bs0 → J/ψf0(980))/B(Bs0 → J/ψφ(1020)) in pp collisions at √s=7 TeV

Dinardo, M. E.;Fiorendi, S.;Gerosa, R.;Ghezzi, A.;Govoni, P.;Lucchini, M. T.;Manzoni, R. A.;Martelli, A.;Marzocchi, B.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;De Guio, F.;
2016

Abstract

A measurement of the ratio of the branching fractions of the Bs0 meson to J/ψf0(980) and to J/ψφ(1020) is presented. The J/ψ, f0(980), and φ(1020) are observed through their decays to μ+μ-, π+π-, and K+K-, respectively. The f0 and the φ are identified by requiring |Mπ+π--974 MeV|<50 MeV and |MK+K--1020 MeV|<10 MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7 TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3 fb-1. The measured ratio is B(Bs0→J/ψf0)B(f0→π+π-)/B(Bs0→J/ψφ)B(φ→K+K-) = 0.140±0.008(stat) ± 0.023(syst), where the first uncertainty is statistical and the second is systematic.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
2016
756
84
102
none
Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2016). Measurement of the ratio B(Bs0 → J/ψf0(980))/B(Bs0 → J/ψφ(1020)) in pp collisions at √s=7 TeV. PHYSICS LETTERS. SECTION B, 756, 84-102 [10.1016/j.physletb.2016.02.047].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187800
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