Dileptonic signatures of T-odd quarks at the LHC

Abstract

Little Higgs models are often endowed with a T-parity in order to satisfy electroweak precision tests and give at the same time a stable particle which is a candidate for cold dark matter. This type of models predicts a set of new T-odd fermions in addition to the heavy gauge bosons of the Little Higgs models, which may show interesting signatures at colliders. In this paper, we study the signatures of strong and electroweak pair production of the first two generations of T-odd quarks at the LHC. We focus on the dileptonic signatures (a) pp→l^± l^∓jj E/T (opposite-sign dileptons) and (b) pp→l^± l^±jj E/T (same-sign dileptons).