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Search for W Boson Decays to Three Charged Pions

Author
Sirunyan A.M. Yerevan Physics Institute, Armenia
Finger Miroslav, prof. Ing. DrSc. Faculty of Mathematics and Physics, Charles University in Prague
Finger Michael, M.Sc. CSc. Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
et al.  different institutions

Year
2019

Scientific journal
PHYSICAL REVIEW LETTERS 122 (15) 151802

Web


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 x 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.

Cite article as:
A. Sirunyan, M. Finger, M. Finger, . et al., "Search for W Boson Decays to Three Charged Pions ", PHYSICAL REVIEW LETTERS 122 (15) 151802 (2019)