2015/07/31 by CMS Collaboration, V. Khachatryan, A. M. Sirunyan +98
Chemistry · Mathematics · Physics and Astronomy · #Analytical Chemistry (journal) #CP violation #Chemistry #Geometry #High-Energy Particle Collisions Research #Inverse #Large Hadron Collider #Luminosity #Mathematics #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Phase (matter) #Phase difference #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex
paper · pdf · doi:10.1016/j.physletb.2016.03.046
published as Phys. Lett. B 757 (2016) 97 · Replaced with published version. Added journal reference. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-13-012/index.html
openalex publication_date 2016/03/22 · arxiv created 2016/04/19 · arxiv updated 2016/04/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The CP-violating weak phase ϕ s of the B s 0 meson and the decay width difference Δ Γ s of the B s 0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of B s 0 → J / ψ ϕ ( 1020 ) → μ + μ − K + K − decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb − 1 collected in pp collisions at a centre-of-mass energy of 8 TeV . A total of 49 200 reconstructed B s 0 decays are used to extract the values of ϕ s and Δ Γ s by performing a time-dependent and flavour-tagged angular analysis of the μ + μ − K + K − final state. The weak phase is measured to be ϕ s = − 0.075 ± 0.097 ( stat ) ± 0.031 ( syst ) rad , and the decay width difference is Δ Γ s = 0.095 ± 0.013 ( stat ) ± 0.007 ( syst ) ps − 1 .