Search for the Z Boson Decay to ττμμ in Proton-Proton Collisions at sqrt[s]=13 TeV
Physical review letters, vol.133, no.16, pp.161805, 2024 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 133 Issue: 16
- Publication Date: 2024
- Doi Number: 10.1103/physrevlett.133.161805
- Journal Name: Physical review letters
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, DIALNET
- Page Numbers: pp.161805
- Middle East Technical University Affiliated: Yes
Abstract
The first search for the Z boson decay to ττμμ 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 138 fb^{-1}. 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 Z→ττμμ to Z→4μ 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.