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
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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