Measurement of angular parameters from the decay B⁰ → K^*0 μ⁺ μ^- in proton-proton collisions at √(s) = 8 TeV

2017/10/31 by CMS Collaboration · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1016/j.physletb.2018.04.030

published as Phys. Lett. B 781 (2018) 517 · Replaced with the published version. Added the journal reference. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-15-008/ (CMS Public Pages)

arxiv created 2018/06/15 · arxiv updated 2018/06/19

Abstract

Angular distributions of the decay B⁰ → K^*0 μ⁺ μ^- are studied using a sample of proton-proton collisions at √(s) = 8 TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5 fb^-1. An angular analysis is performed to determine the P₁ and P₅' parameters, where the P₅' parameter is of particular interest because of recent measurements that indicate a potential discrepancy with the standard model predictions. Based on a sample of 1397 signal events, the P₁ and P₅' parameters are determined as a function of the dimuon invariant mass squared. The measurements are in agreement with predictions based on the standard model.

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