CP violation in tau -> K pi pi nu_tau

Details CP violation in tau -> K pi pi nu_tau CP violation in tau -> K pi pi nu_tau

2008-08-12

arxiv.org/abs/0808.1707v1

Phys.Rev.D78:113008,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 3 figures

Scientific paper

10.1103/PhysRevD.78.113008

We consider CP-violating effects in tau->K pi pi nu_tau, assuming that a charged Higgs boson provides a new amplitude that can interfere with the usual Standard Model amplitude. We consider four CP-odd observables -- the regular rate asymmetry, two modified rate asymmetries and a triple-product asymmetry. The regular rate asymmetry is expected to be small because it requires the interference of the new physics amplitude with the standard model amplitude containing the hadronic scalar form factor. The other CP asymmetries may be more promising in terms of their new physics reach. Numerical estimates indicate that the maximum obtainable values for the modified and triple-product asymmetries are on the order of a percent.

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