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Search for W Boson Decays to Three Charged Pions
Sirunyan, A. M. Sanders, Stephen J. CMS Collaboration
Sirunyan, A. M.
Sanders, Stephen J.
CMS Collaboration
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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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This work is licensed under a Creative Commons Attribution 4.0 International License.
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2019-04-18
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American Physical Society
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A. M. Sirunyan et al., "Search for W Boson Decays to Three Charged Pions", Phys. Rev. Lett. 122, 151802, 18 April 2019, American Physical Society, https://doi.org/10.1103/PhysRevLett.122.151802