First results on Bilepton production based on LHC collision data and predictions for Run II

Abstract

The LHC potential for discovering doubly-charged vector bileptons is investigated considering the measurable process $pp$ $\to$ ${\mu }^{\mp }{\mu }^{\mp }{\mu }^{\pm }{\mu }^{\pm }X$. The study is performed assuming different bilepton and leptoquark masses. The process cross-section is calculated at leading-order using the \textsc{Calchep} package. Combining the calculation with the latest ATLAS experiment results at a center-of-mass energy of 7 TeV, bounds on bilepton masses based on LHC data are derived for the first time. The results exclude bileptons masses in the range of 200 GeV to 500 GeV at 95\% C.L., depending on the leptoquark mass. Moreover, minimal LHC integrated luminosities needed for discovering and for setting limits on bilepton masses are obtained for 13 TeV center-of-mass energy. Simulated events are passed through a fast parametric detector simulation using the Delphes package.