• Width effects of theZ resonance and CP-violating asymmetry ine+e annihilation

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      https://www.ias.ac.in/article/fulltext/pram/038/05/0469-0476

    • Keywords

       

      CP violation; Z resonance; Z width; two-Z models; leptonic flavor violation

    • Abstract

       

      CP-violating rate asymmetry can be generated in a process only if its amplitude possesses an absorptive part. It is pointed out that such an absorptive part can be provided ine+e annihilation by the presence of aZ(Z′) resonance of non-zero width. The CP asymmetry in the process$$e^ + e^ - \to l_i \bar l\left( {l_i \bar l_j } \right)$$, whereli are charged leptons, is discussed in several models. In a specific two-Z model, large and observable CP asymmetry ine+eτ+e (τe+) is shown to be possible at LEP/SLC energies.

    • Author Affiliations

       

      Anjan S Joshipura1 Saurabh D Rindani1

      1. Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad - 380 009, India
    • Dates

       
  • Pramana – Journal of Physics | News

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