Angular Analysis of the ${B}^{+}\ensuremath{\rightarrow}{K}^{*+}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ Decay

Open Access

Angular Analysis of the $B^{+} \to K^{* +} μ^{+} μ^{-}$ Decay

R. Aaij et al. (LHCb Collaboration)

Phys. Rev. Lett. 126, 161802 – Published 22 April 2021

Abstract

We present an angular analysis of the $B^{+} \to K^{* +} (\to K_{S}^{0} π^{+}) μ^{+} μ^{-}$ decay using $9 {fb}^{- 1}$ of $p p$ collision data collected with the LHCb experiment. For the first time, the full set of $C P$ -averaged angular observables is measured in intervals of the dimuon invariant mass squared. Local deviations from standard model predictions are observed, similar to those in previous LHCb analyses of the isospin-partner $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay. The global tension is dependent on which effective couplings are considered and on the choice of theory nuisance parameters.

Received 4 January 2021
Accepted 11 March 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.161802

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.