Model-Independent Observation of Exotic Contributions to B0 →j /ψK+π- Decays

Research output: Contribution to journalArticle

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Institution Nikhef National Institute for Subatomic Physics
  • Universität Zürich
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • University of Michigan, Ann Arbor.
  • LPC
  • University of Cincinnati
  • Laboratori Nazionali dell'Infn di Frascati
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Universitat de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • INFN Padova
  • IN2P3
  • Sezione INFN di Firenze
  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland. ahmad@mpip-mainz.mpg.de
  • Sezione INFN di Ferrara
  • University of Maryland, College Park, Maryland 20742 USA
  • CNRS/IN2P3
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • Yandex School of Data Analysis
  • INFN Sezione di Cagliari
  • Ruprecht-Karls-Universität Heidelberg
  • THE UNIVERSITY OF WARWICK
  • Laboratoire Leprince-Ringuet
  • Institute of Physics
  • Max-Planck-Institut für Kernphysik (MPIK)

Abstract

An angular analysis of B0→J/ψK+π- decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3 fb-1 collected with the LHCb detector. The m(K+π-) spectrum is divided into fine bins. In each m(K+π-) bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by K resonances is examined, making minimal assumptions about the K+π- system. The data reject the K-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the m(J/ψπ-) vs m(K+π-) plane suggests structures near m(J/ψπ-)=4200 and 4600 MeV.

Details

Original languageEnglish
Article number152002
Number of pages10
JournalPhysical Review Letters
Volume122
Issue number15
Publication statusPublished - 17 Apr 2019

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