Search for W Boson Decays to Three Charged Pions

CMS Collaboration

Research output: Contribution to journalArticle

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 77.3 fb-1, have been analyzed. No significant excess is observed above the background expectation. An upper limit of 1.01×10-6 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.

Original languageEnglish
Article number151802
JournalPhysical Review Letters
Volume122
Issue number15
DOIs
Publication statusPublished - 18 Apr 2019

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pions
bosons
protons
decay
center of mass
confidence
luminosity
collisions
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for W Boson Decays to Three Charged Pions. / CMS Collaboration.

In: Physical Review Letters, Vol. 122, No. 15, 151802, 18.04.2019.

Research output: Contribution to journalArticle

CMS Collaboration. / Search for W Boson Decays to Three Charged Pions. In: Physical Review Letters. 2019 ; Vol. 122, No. 15.
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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 77.3 fb-1, have been analyzed. No significant excess is observed above the background expectation. An upper limit of 1.01×10-6 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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