Measurement of the ratio B(B0s → J/ψf0(980))/B(B0s → J/ψφ(1020)) in pp collisions at √s= 7 TeV

CMS Collaboration

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Abstract

A measurement of the ratio of the branching fractions of the B0s 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− − 974MeV| <50MeV and |MK+K− − 1020 MeV| <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.
Original languageEnglish
Pages (from-to)84-102
Number of pages19
JournalPhysics Letters B
Volume756
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Decay
  • Angle γ
  • CP violation

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