2006/08/28 by Kingman Cheung, C. S. Kim, Kang Young Lee +1 · 1 citation
Physics and Astronomy · #Gluon #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #Top quark #hep-ph
paper · pdf · doi:10.1103/physrevd.74.115013
published as Phys.Rev.D74:115013,2006 · 27 pages, using RevTeX; references added
arxiv created 2006/08/28 · openalex publication_date 2006/12/18 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The colored SU(2)L-singlet heavy T-quark is one of the most crucial ingredients in little Higgs models, which is introduced to cancel the largest contribution of the standard model (SM) top quark to the Higgs boson mass at one-loop level. In two representative little Higgs models, the littlest Higgs model and the SU(3) simplest Higgs model, we comprehensively study the single heavy T-quark production at Large Hadron Collider (LHC). After presenting the possibility of relatively light (\ensuremath∼500 GeV) T-quark in the simplest little Higgs model, we consider all the relevant processes, the 2\ensuremath→2 process of qb\ensuremath→q^\ensuremath'T, the 2\ensuremath→3 process of qg\ensuremath→q^\ensuremath'Tb, the s-channel process of qq^\ensuremath'\ensuremath→Tb, and the gluon-fusion process of gg\ensuremath→Tt. We found that the 2\ensuremath→3 process can be quite important, as its cross section is about 30% of the 2\ensuremath→2 one and it is dominant in high pT distributions. The s-channel and the gluon-fusion processes also show distinctive features in spite of their suppressed cross sections. In the gluon-fusion process of the simplest little Higgs model, for example, the pseudoscalar contribution is rather dominant over the Higgs contribution for relatively light MT.