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Chinese Physics C> 1996, Vol. 20> Issue(11) : 997-1002 

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

  •  Physics Department,Henan Normal University, Xin Xiang 4530022 Institute of Modem Physics, Tsinghua University,Beijing 100084

  • 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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  • References

    [1] K.Hagiwara,Implications of Precision Electroweak Data,talk presented at 17th International Symposiumonon Lepton-Photon Interactions,August10-15,1995,Beijing.[2] M.E.Peskin,T.Tacheuchi,iPhys/i.iRev/i,D46（1992）381.[3] R.S.Chivukula et al,iPhys/i.iRev/i iLett/i.69（1992）575;R.S.Chivukula et al,iPhys/i iLett/i,311B（1993）157;N.Evans,iPhys/iiLett/i,B331（1994）378.[4] T.Appelquist J.Terning,iPhys/i.iLett/i,B315（1993）139;T.Appekquist,J.Terning,iPhys/i iRev/i.D50（1994）2116. [5] N.kitazawa,iPhys/i iLett/i,B313（1993）393.[6] Guo-Hong Wu,iPhys/i iRev/i.iLett/i,74（1995）4137.[7] B.Holdom,iPhys/i.iLett/i,B339（1994）114.[8] Z.Xiao,L.Wan,G.Lu et al.,J.iPhys/i.,G20（1994）901.

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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
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1996-11-05

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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