Angular Analysis of the B + → K * + μ + μ − Decay

Physical Review Letters, vol. 126, pp. 161802

Abstract

We present an angular analysis of the ${B}^{+}\ensuremath{\rightarrow}{K}^{*+}(\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}){\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay using $9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collision data collected with the LHCb experiment. For the first time, the full set of $CP$-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 ${B}^{0}\ensuremath{\rightarrow}{K}^{*0}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay. The global tension is dependent on which effective couplings are considered and on the choice of theory nuisance parameters.

Authors 11

1. C. Aidala

   University of Michigan · Syracuse University

   Affiliation as printed

   University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)

2. S. Akar

   University of Cincinnati

   Affiliation as printed

   University of Cincinnati, Cincinnati, Ohio, USA

3. S. Amato

   Universidade Federal do Rio de Janeiro

   Affiliation as printed

   Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

4. K. Belous

   Kurchatov Institute · Institute for High Energy Physics

   Affiliation as printed

   Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, Russia

5. I. Belyaev

   Kurchatov Institute · Institute for Theoretical and Experimental Physics

   Affiliation as printed

   Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia

6. G. Bencivenni

   Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

   Affiliation as printed

   INFN Laboratori Nazionali di Frascati, Frascati, Italy

7. E. Ben-Haim

   Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

   Affiliation as printed

   LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

8. Alexander Berezhnoy

   Lomonosov Moscow State University

   Affiliation as printed

   Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia

9. P. Billoir

   Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

   Affiliation as printed

   LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

10. M. Birch

    Imperial College London

    Affiliation as printed

    Imperial College London, London, United Kingdom

11. A. Bizzeti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze, Firenze, Italy