Radiative Corrections to the Zbb and Zτ+τ Vertices in a Realistic One-Family Extended Technicolor Model

  • In a realistic effective one-family extended technicolor(ETC)model without exact custodial symmetry, we calculate the one-loop corrections to the Zbb and Zτ+τ vertices from the sideways and diagonal ETC gauge boson exchange.The results show that both the Z→ bb partial Width Γb and branching ratio Rb and the τ polarization asymmetry parameter Aτ are enhanced by the corrections and are in agreement with the present experimental data.
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Yue Chongxing, Kuang Yuping and Lu Gongru. Radiative Corrections to the Zbb and Zτ+τ Vertices in a Realistic One-Family Extended Technicolor Model[J]. Chinese Physics C, 1996, 20(11): 997-1002.
Yue Chongxing, Kuang Yuping and Lu Gongru. Radiative Corrections to the Zbb and Zτ+τ Vertices in a Realistic One-Family Extended Technicolor Model[J]. Chinese Physics C, 1996, 20(11): 997-1002. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Radiative Corrections to the Zbb and Zτ+τ Vertices in a Realistic One-Family Extended Technicolor Model

    Corresponding author: Yue Chongxing,
  • Physics Department,Henan Normal University, Xin Xiang 4530022 Institute of Modem Physics, Tsinghua University,Beijing 100084

Abstract: In a realistic effective one-family extended technicolor(ETC)model without exact custodial symmetry, we calculate the one-loop corrections to the Zbb and Zτ+τ vertices from the sideways and diagonal ETC gauge boson exchange.The results show that both the Z→ bb partial Width Γb and branching ratio Rb and the τ polarization asymmetry parameter Aτ are enhanced by the corrections and are in agreement with the present experimental data.

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