Angular distribution asymmetry in tau^- --> pi^- pi^0 nu_tau decay in the two-Higgs-doublet model with large tan beta release_a2vdg6bdbvh73mh3vackw3bq7y

by Dao-Neng Gao

Released as a report .

2004  

Abstract

We study possible scalar type interactions in tau^- -->pi^- pi^0 nu_tau decay. One finds that an angular distribution asymmetry, A(s), can be induced from the interference between the scalar part and vector part amplitudes in this decay. Our analysis shows that, in the two-Higgs-doublet model of type II with large tan beta, the charged Higgs contribution could make A(s) up to 10^-3 without conflict with present experimental constraints. Thus in the future precise experiments in tau-charm factories, this angular distribution asymmetry may be an interesting observable either to be helpful in searching for the signal of the charged Higgs boson or to impose the significant bound on it.
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Type  report
Stage   submitted
Date   2004-11-21
Version   v1
Language   en ?
Number  USTC-ICTS-04-22
arXiv  hep-ph/0411284v1
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