Physics Letters B (Feb 2016)

Angular analysis of the decay B0→K⁎0μ+μ− from pp collisions at s=8 TeV

  • V. Khachatryan,
  • A.M. Sirunyan,
  • A. Tumasyan

DOI
https://doi.org/10.1016/j.physletb.2015.12.020
Journal volume & issue
Vol. 753, no. C
pp. 424 – 448

Abstract

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The angular distributions and the differential branching fraction of the decay B0→K⁎(892)0μ+μ− are studied using data corresponding to an integrated luminosity of 20.5 fb−1 collected with the CMS detector at the LHC in pp collisions at s=8 TeV. From 1430 signal decays, the forward–backward asymmetry of the muons, the K⁎(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the dimuon invariant mass squared. The measurements are among the most precise to date and are in good agreement with standard model predictions.

Keywords