Probing Top Quark Polarization Effects in Topcolor-Assisted Technicolor Model

  • 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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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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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

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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