• Open Access

Search for W Boson Decays to Three Charged Pions

A. M. Sirunyan et al. (CMS Collaboration)
Phys. Rev. Lett. 122, 151802 – Published 18 April 2019

Abstract

For the first time, a search for the rare decay of the W boson to three charged pions has been performed. Proton-proton collision data recorded by the CMS experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 77.3fb1, have been analyzed. No significant excess is observed above the background expectation. An upper limit of 1.01×106 is set at 95% confidence level on the branching fraction of the W boson to three charged pions. This provides a strong motivation for theoretical calculations of this branching fraction.

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  • Received 30 January 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.151802

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.

© 2019 CERN, for the CMS Collaboration

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Particles & Fields

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Vol. 122, Iss. 15 — 19 April 2019

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