The flavor-changing single-top quark production in the littlest Higgs model with T parity at the LHC

Abstract

The littlest Higgs model with discrete symmetry named "T-parity"(LHT) is an interesting new physics model which does not suffer strong constraints from electroweak precision data. One of the important features of the LHT model is the existence of new source of FC interactions between the SM fermions and the mirror fermions. These FC interactions can make significant loop-level contributions to the couplings $tcV$, and furthermore enhance the cross sections of the FC single-top quark production processes. In this paper, we study some FC single-top quark production processes, $pp\to t\bar{c}$ and $pp\to tV$, at the LHC in the LHT model. We find that the cross sections of these processes are strongly depended on the mirror quark masses. The processes $pp\to t\bar{c}$ and $pp\to tg$ have large cross sections with heavy mirror quarks. The observation of these FC processes at the LHC is certainly the clue of new physics, and further precise measurements of the cross scetions can provide useful information about the free parameters in the LHT model, specially about the mirror quark masses.

20 pages, 5 figures

References in corpus (5)

• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• Single top-quark production by direct supersymmetric flavor-changing neutral-current interactions at the LHC
• The productions of the top-pions and top-Higgs associated with the charm quark at the hadron colliders

Cited by in corpus (5)

• R-parity violating effects in top quark FCNC productions at LHC
• Higgs-pair Production and Decay in Simplest Little Higgs Model
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• R_b Constraints on Littlest Higgs Model with T-parity