Search for new physics in high $p_T$ like-sign dilepton events at CDF~II

TL;DR

This paper reports a search for new physics involving high transverse momentum like-sign dilepton events at CDF II, setting mass limits on doubly-charged scalars with results consistent with the Standard Model.

Contribution

First search for doubly-charged scalars in like-sign dilepton events at CDF II with new mass limits established.

Findings

No significant excess over Standard Model predictions.

Lower mass limits for doubly-charged scalars range from 190 to 245 GeV/c^2.

Results constrain models predicting such particles.

Abstract

We present a search for new physics in events with two high $p_T$ leptons of the same electric charge, using data with an integrated luminosity of 6.1 fb$^{-1}$. The observed data are consistent with standard model predictions. We set 95% C.L. lower limits on the mass of doubly-charged scalars decaying to like-sign dileptons, $m_{H^{\pm\pm}}> 190-245$ GeV/$c^2$, depending on the decay mode and coupling.