Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor

• Published in: Chinese physics C 2008-09, Vol.32 (9), p.697-699
• Main Author: 柳国丽 张焕君
• Format: Article
• Language: English
• Subjects: LHC; 中性标量; 彩色印片法; 顶夸克; 高能物理学
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/32/9/004

The topcolor-assisted technicolor （TC2） model predicts a number of neutral scalars like the top-pion （πt^0） and the top-Higgs （ht^0）. These scalars have flavor-changing neutral-current （FCNC） top quark couplings, among which the top-charm transition couplings may be sizable. Such FCNC couplings induce single top productions associated with a neutral scalar at the CERN Large Hadron Collider （LHC） through the parton processes cg→ tπt^0 and cg→ tht^0. In this paper we examine these productions and find their production rates can exceed the 3σ sensitivity of the LHC in a large part of parameter space. Since in the Standard Model and the minimal supersymmetric model such rare productions have unobservably small production rates at the LHC, these rare processes will serve as a good probe for the TC2 model.