ASSOCIATED PRODUCTION OF SINGLE HEAVY T-QUARK IN THE LEFT-RIGHT TWIN HIGGS MODEL AT THE LHC

The heavy T-quark is one of the most crucial ingredients in the left-right twin Higgs model, which is introduced to cancel the largest contribution of the Standard Model top quark to the Higgs boson mass at one-loop level. In this paper, we study the relevant single heavy T-quark production processes, the 2 -> 2 partonic processes of qb -> q'T and qq' -> (b) over barT, the 2 -> 3 partonic processes of q (q) over bar' -> g (b) over barT and qg -> q'(b) over barT at the CERN LHC. Our numerical results show that the 2 -> 3 process can be quite important, as its cross-section is about 60% of that for the 2 -> 2 process at the LHC. We also show the p(T) distribution and the rapidity distributions for out-going particles. For the 2 -> 3 process, the production rate of the l+(v) over bar (l)bbbb(j) final state can be larger than 100 fb with reasonable values of the free parameters. The possible signatures of the heavy T-quark might be detected via the process pp -> T (b) over bar + jet + X at the LHC.