# Angular analysis of the decay $B^0 → K^{∗0}μ^+μ^−$ from pp collisions at $\sqrt{s} = 8$ TeV

CMS Collaboration; Canelli, F; Chiochia, V; Kilminster, B; Robmann, P; et al (2016). Angular analysis of the decay $B^0 → K^{∗0}μ^+μ^−$ from pp collisions at $\sqrt{s} = 8$ TeV. Physics Letters B, 753:424-448.

## Abstract

The angular distributions and the differential branching fraction of the decay $B^0→K^⁎(892)^0μ^+μ^−$ 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 $\sqrt{s} = 8$ 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.

## Abstract

The angular distributions and the differential branching fraction of the decay $B^0→K^⁎(892)^0μ^+μ^−$ 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 $\sqrt{s} = 8$ 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.

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2016 04 Jan 2017 10:52 23 Sep 2018 06:04 Elsevier 0370-2693 Gold Publisher DOI. An embargo period may apply. https://doi.org/10.1016/j.physletb.2015.12.020