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Search for W boson decays to three charged pions
Authors A. M. Sirunyan, S. Lo Meo, et al.  Year 2019
Pubblication type Paper International Journal with referee
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.
Reference Phys. Rev. Lett. 122 (2019) 151802
https://dx.doi.org/10.1103/PhysRevLett.122.151802
Research unit RADEC
LastUpdate 07/01/2022
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