A measurement of the ratio of the branching fractions of the View the MathML sourceBs0 meson to J/ψf0(980)J/ψf0(980) and to J/ψϕ(1020)J/ψϕ(1020) is presented. The J/ψJ/ψ, f0(980)f0(980), and ϕ(1020)ϕ(1020) are observed through their decays to μ+μ−μ+μ−, π+π−π+π−, and K+K−K+K−, respectively. The f0f0 and the ϕ are identified by requiring |Mπ+π−−974 MeV|<50 MeV|Mπ+π−−974 MeV|<50 MeV and |MK+K−−1020 MeV|<10 MeV|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 View the MathML sourceB(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.

Measurement of the ratio B(B0s -> J/psi f0(980))/B(B0s -> J/psi phi(1020)) in pp collisions at sqrt(s) = 7 TeV

CANDELISE, VIERI;DELLA RICCA, GIUSEPPE;LA LICATA, CHIARA;MARONE, MATTEO;SCHIZZI, ANDREA;UMER, TOMO;
2016

Abstract

A measurement of the ratio of the branching fractions of the View the MathML sourceBs0 meson to J/ψf0(980)J/ψf0(980) and to J/ψϕ(1020)J/ψϕ(1020) is presented. The J/ψJ/ψ, f0(980)f0(980), and ϕ(1020)ϕ(1020) are observed through their decays to μ+μ−μ+μ−, π+π−π+π−, and K+K−K+K−, respectively. The f0f0 and the ϕ are identified by requiring |Mπ+π−−974 MeV|<50 MeV|Mπ+π−−974 MeV|<50 MeV and |MK+K−−1020 MeV|<10 MeV|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 View the MathML sourceB(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.
http://www.sciencedirect.com/science/article/pii/S037026931600143X
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2865907
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