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.

Search for W Boson Decays to Three Charged Pions / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Frühwirth, R., Ghete, V.M., Hrubec, J., Jeitler, M., Krammer, N., Krätschmer, I., Liko, D., Madlener, T., Mikulec, ., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 122:15(2019). [10.1103/PhysRevLett.122.151802]

Search for W Boson Decays to Three Charged Pions

Creanza, D.;De Filippis, N.;Di Florio, A.;Iaselli, G.;Maggi, G.;Pugliese, G.;
2019

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
Search for W Boson Decays to Three Charged Pions / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Frühwirth, R., Ghete, V.M., Hrubec, J., Jeitler, M., Krammer, N., Krätschmer, I., Liko, D., Madlener, T., Mikulec, ., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 122:15(2019). [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/11589/208541
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