CP Violation Search in $τ\to ππ^0ν_τ$ Decays

Details CP Violation Search in $τ\to ππ^0ν_τ$ Decays CP Violation Search in $τ\to ππ^0ν_τ$ Decays

2001-07-06

arxiv.org/abs/hep-ph/0107070v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 7 figures, 1 table. Conference proceeding for BCP4, 19-23 February 2001, Ise-Shima, Japan

Scientific paper

Using a sample of 12.2 million $\tau$-lepton pairs produced by $e^+e^-$ annihilation at $\sqrt{s}\sim 10.6 $GeV and collected by the CLEO detector, we search for and set limits on CP violation in $\tau$-lepton decays. For each event, we require that both $\tau$-leptons decay via the mode $\tau\ra \pi\pi^0\nu$. The search is performed within the context of a multi-Higgs Doublet Model and the imaginary part of the coupling constant parameterizing the non-Standard Model diagram leading to CP violation is constrained to be $-0.046 < \Im{(\Lambda}) < 0.022$ at 90% CL. The novel search technique is of general utility.

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