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Measurement of the ratio B(B0s→J/ψf0(980))/B(B0s→J/ψφ(1020)) in pp collisions at √s = 7 TeV
CMS Collaboration
CMS Collaboration
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Abstract
A measurement of the ratio of the branching fractions of the B0smeson 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 f0and the φare identified by requiring |Mπ+π−−974MeV| <50MeVand |MK+K−−1020MeV| <10MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3fb−1. The measured ratio is B(B0s→J/ψf0)B(f0→π+π−)B(B0s→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.
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2016-02-27
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Elsevier
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CMSCollab_2016.pdf
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Khachatryan, V., Erbacher, R., Carrillo Montoya, C. A., Moon, C. S., Carvalho, W., Górski, M., ... & Ozturk, S. (2015). Measurement of the ratio $ B (B^ 0_s\to J/\psi f_0 (980)) $/$ B (B^ 0_s\to J/\psi\phi (1020)) $ in pp collisions at $\sqrt s $= 7 TeV. Phys. Lett., 756(CERN-PH-EP-2015-003), 84-102.