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

LIU Guo-Li; ZHANG Huan-Jun

doi:10.1088/1674-1137/32/9/004

Chinese Physics C> 2008, Vol. 32> Issue(9) : 697-699 DOI: 10.1088/1674-1137/32/9/004

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

LIU Guo-Li ,
ZHANG Huan-Jun ^,

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Abstract：
The topcolor-assisted technicolor (TC2) model predicts a number of neutral scalars like the top-pion (π⁰_t) and the top-Higgs (h⁰_t). 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→t π⁰_t and cg→t h⁰_t. 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.

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LIU Guo-Li and ZHANG Huan-Jun. Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor[J]. Chinese Physics C, 2008, 32(9): 697-699. doi: 10.1088/1674-1137/32/9/004

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Received: 2007-11-08
Revised: 2007-11-23

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: ZHANG Huan-Jun,

Received Date: 2007-11-08

Accepted Date: 2007-11-23

Available Online: 2008-09-05

Abstract:

The topcolor-assisted technicolor (TC2) model predicts a number of neutral scalars like the top-pion (π⁰_t) and the top-Higgs (h⁰_t). 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→t π⁰_t and cg→t h⁰_t. 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.

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

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