Angular analysis of $B_d^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ decays in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

Abstract

An angular analysis of the decay $B_d^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ is presented, based on proton-proton collision data recorded by the ATLAS experiment at the LHC. The study is using 20.3 fb${}^{-1}$ of integrated luminosity collected during 2012 at centre-of-mass energy of $\sqrt{s}=8$ TeV. Measurements of the $K^{\ast }$ longitudinal polarisation fraction and a set of angular parameters obtained for this decay are presented. The results are compatible with the Standard Model predictions.

47 pages in total, author list starting page 31, 11 figures, 15 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2013-02/