Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-01-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
34pages, 16figures. The references are corrected
Scientific paper
We study the hadronic form factors of tau lepton decays tau -> K pi(eta) nu. We compute one loop corrections to the form factors using the chiral Lagrangian including vector mesons. In the vector form factor, K* resonance behavior is reproduced by resumming the vector meson self-energy diagrams. We fit the data of the hadronic invariant mass spectrum measured by Belle by determining some of the counterterms of the Lagrangian. Besides the hadronic invariant mass spectrum, the forward and backward asymmetry is predicted. We also study the effect of CP violation of a two Higgs doublet model. In the model, CP violation of the neutral Higgs sector generates the mixing of CP even Higgs and CP odd Higgs. We show how the mixing leads to the direct CP violation of the tau decays and predict the CP violation of the forward and backward asymmetry.
Kimura Daichi
Lee Kang Young
Morozumi Takuya
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