Preprint

·2024 OPEN ACCESS

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

Aram Hayrapetyan , A. Tumasyan , W. Adam , Janik Walter Andrejkovic , T. Bergauer , S. Chatterjee , K. Damanakis , M. Dragicevic , Priya Sajid Hussain , M. Jeitler ,

Physical Review Letters

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. © 2024 CERN, for the CMS Collaboration 2024 CERN

Keywords

Physics Lepton Particle physics Large Hadron Collider Muon Nuclear physics Branching fraction Luminosity Boson Proton Standard Model (mathematical formulation) Electron

Subject Areas

Particle physics theoretical and experimental studies ·Nuclear and High Energy Physics ·Physical Sciences
High-Energy Particle Collisions Research ·Nuclear and High Energy Physics ·Physical Sciences
Particle Detector Development and Performance ·Nuclear and High Energy Physics ·Physical Sciences