Indirect search for color octet muon at future muon colliders

SM fermion mixings and family replication indicate that matter must have a preonic structure. In ATLAS and CMS experiments, BSM particles are widely studied. The prediction of these particles can be considered as a significant result of preonic models. Leptons are predicted to have color octet partners, l8, in composite models. These particles are similar to excited leptons and leptoquarks. On the other hand, muon colliders are considered as promising machines to achieve a multi-TeV scale at the constituent level. In this study, the search potential of future muon colliders for color octet muons was investigated. The interaction Lagrangian of color octet muon, µ8, is implemented into the CalcHEP simulation program. Then different final state distributions for signal and background procedures have been analyzed to determine optimal cuts on transverse momentum and pseudo-rapidity. Finally, statistical significance analysis has been performed in order to obtain exclusion (2σ), observation (3σ), and discovery (5σ) limits on the mass of color octet muon. It is shown that color octet muons with masses up to 3.19 TeV, 6.65 TeV, 12.8 TeV, 25.9 TeV, and 135 TeV can be observed at muon colliders with √(s_μμ ) equal to 1.5 TeV, 3 teV, 6 TeV, 14 teV and 100 TeV, respectively. In conclusion, future muon colliders have huge potential for µ8 search.