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First search for CP violation in tau lepton decay
Ammar, Raymond G. Baringer, Philip S. Bean, Alice Besson, David Zeke Coppage, Don Darling, C. Davis, Robin E. P. Kotov, S. Kravchenko, I. Kwak, Nowhan
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
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Abstract
We have performed the first search for CP violation in tau lepton decay. CP violation in lepton decay does not occur in the minimal standard model but can occur in extensions such as the multi-Higgs doublet model. It appears as a characteristic difference between the tau(-) and tau(+) decay angular distributions for the semileptonic decay modes such as tau(-) --> K-0 pi(-) nu. We define an observable asymmetry to exploit this and find no evidence for any CP violation. [S0031-9007(98)07548-6].
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1998-11
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AMERICAN PHYSICAL SOC
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p3823_1.pdf
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Anderson, S, Kubota, Y, et al. First search for CP violation in tau lepton decay. PHYSICAL REVIEW LETTERS. November 1998. 81(18) : 3823-3827