Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model

GU Qin-Zhong; JIANG Feng-Chun; WANG Xue-Lei; YANG Hua

Chinese Physics C> 2007, Vol. 31> Issue(11) : 1010-1015

Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model

Shangqiu Teachers College, Shangqiu 476000, China2 Henan Normal University, Xinxiang 453007, China3 Zhengzhou University of Light Industry, Zhengzhou 450002, China4 Information Engineering University, Zhengzhou 450004, China

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Abstract：
We study the polarization effects of the top-quark on the tt production cross sections at hadron colliders in the topcolor-assisted technicolor model. The MRS set A′ parton distributions and the helicity projection operators methods are used in the calculation. It is shown that the polarization effects of the top quark are too small to produce enough identified signals at the Tevatron while they can be large enough to be detected at the LHC with reasonable values of the parameters. The polarization effects at the LHC can reach 16%, therefore, they provide feasible tests of the topcolor-assisted technicolor model.

References

[1]

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GU Qin-Zhong, JIANG Feng-Chun, WANG Xue-Lei and YANG Hua. Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model[J]. Chinese Physics C, 2007, 31(11): 1010-1015.

GU Qin-Zhong, JIANG Feng-Chun, WANG Xue-Lei and YANG Hua. Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model[J]. Chinese Physics C, 2007, 31(11): 1010-1015. shu

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Received: 2007-01-25
Revised: 2007-02-06

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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

Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model

Corresponding author: WANG Xue-Lei,

Shangqiu Teachers College, Shangqiu 476000, China2 Henan Normal University, Xinxiang 453007, China3 Zhengzhou University of Light Industry, Zhengzhou 450002, China4 Information Engineering University, Zhengzhou 450004, China

Received Date: 2007-01-25

Accepted Date: 2007-02-06

Available Online: 2007-11-05

Abstract: We study the polarization effects of the top-quark on the tt production cross sections at hadron colliders in the topcolor-assisted technicolor model. The MRS set A′ parton distributions and the helicity projection operators methods are used in the calculation. It is shown that the polarization effects of the top quark are too small to produce enough identified signals at the Tevatron while they can be large enough to be detected at the LHC with reasonable values of the parameters. The polarization effects at the LHC can reach 16%, therefore, they provide feasible tests of the topcolor-assisted technicolor model.

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Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model

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通讯作者: 陈斌, [email protected]

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