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.

Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Search for W Boson Decays to Three Charged Pions. PHYSICAL REVIEW LETTERS, 122(15) [10.1103/PhysRevLett.122.151802].

Search for W Boson Decays to Three Charged Pions

Ciocci, M. A.;Grippo, M. T.;Messineo, A.;
2019-01-01

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.
2019
Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Search for W Boson Decays to Three Charged Pions. PHYSICAL REVIEW LETTERS, 122(15) [10.1103/PhysRevLett.122.151802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1327353