Single Production of a Heavy T-Quark in the Left-Right Twin Higgs Model at LHeC

• Published in: Chinese physics letters Vol. 28; no. 11; pp. 111203 - 1-111203-4
• Main Authors: Shen, Jie-Fen (杰奋 申), Cui, Xiao-Min (小敏 崔), Li, Yu-Qi (玉琦 李), Gao, Yin-Hao (银浩 高)
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2011
• Subjects: Channels; Decay; Electron energy; Hadrons; Invariants; Mathematical models; Photons
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/28/11/111203

In the context of the left-right twin Higgs model, we study single production of a T-quark at the Large Hadron electron Collider based ep and gamma p colliders, which proceed via the processes e super(+)b arrow right v sub(e)T and gamma b arrow right W super(-)T. For the main decay mode T arrow right [straightphi] super(+) b arrow right tbb, these two processes mainly transfer to the final states of 3b + l(e or mu ) + missing E sub(T) and 3b + 2l + missing E sub(T), respectively. With the electron energy E sub(e) = 500 GeV and photon energy E sub(p)-7TeV, we find that the production rates can reach tens fb when the heavy T-quark mass m sub(T) < 600 GeV. A simple phenomenological analysis is also given for the decay mode T arrow right W super(+) b. Our numerical results show that the SM background can be reduced by applying a cut on the transverse momentum of the final b-quark and the invariant mass of Wb. However, such a channel is only useful for a tiny parameter space.