Search for the 𝑍 Boson Decay to 𝜏𝜏𝜇𝜇 in Proton-Proton Collisions at √s = 13 TeV

Physical Review Letters 2024
Kārlis Dreimanis, Antra Gaile, Guntis Pikurs, Andris Potrebko, Markus Seidel, Dimitrios Sidiropoulos Kontos, CMS Collaboration

The first search for the Formula Presented boson decay to Formula Presented at the CERN LHC is presented, based on data collected by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of Formula Presented. The data are compatible with the predicted background. For the first time, an upper limit at the 95% confidence level of 6.9 times the standard model expectation is placed on the ratio of the Formula Presented to Formula Presented branching fractions. Limits are also placed on the six flavor-conserving four-lepton effective-field-theory operators involving two muons and two tau leptons, for the first time testing all such operators.

Keywords
Muons, Tau leptons, W & Z bosons, Hadron colliders
DOI
10.1103/PhysRevLett.133.161805
Hyperlink
https://link.aps.org/doi/10.1103/PhysRevLett.133.161805

The CMS Collaboration, Hayrapetyan, A., Dreimanis, K., Gaile, A., Pikurs, G., Potrebko, A., Seidel, M., Sidiropoulos Kontos, D., ... [et al.] Search for the 𝑍 Boson Decay to 𝜏𝜏𝜇𝜇 in Proton-Proton Collisions at √s = 13 TeV. Physical Review Letters, 2024, Vol. 133, No. 16, Article number 161805. ISSN 0031-9007. e-ISSN 1079-7114. Pieejams: doi:10.1103/PhysRevLett.133.161805

Publication language
English (en)