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

作     者：柳国丽 张焕君 

作者机构：Department of PhysicsZhengzhou University Department of PhysicsHenan Normal University 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2008年第32卷第9期

页      面：697-699页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

主　　题：top quark technicolor LHC 

摘      要：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.