Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-11-21
Phys.Rev. D71 (2005) 051301
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 2 figures, minor changes and references added. To appear in Phys. Rev. D (Rapid Communication)
Scientific paper
10.1103/PhysRevD.71.051301
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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