Leptonic CP-violating asymmetry in e+e annihilation due to Z width effects

Joshipura, Anjan S. ; Rindani, Saurabh D. (1992) Leptonic CP-violating asymmetry in e+e annihilation due to Z width effects Physical Review D - Particles, Fields, Gravitation and Cosmology, 46 (7). pp. 3008-3014. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v46/i7/p3008_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.46.3008

Abstract

CP-violating rate asymmetry can be generated in a process only if its amplitude possesses an absorptive part. Such an absorptive part can be provided in e+e annihilation by the presence of a Z resonance of nonzero width. The lepton-flavor-violating CP asymmetry in the process lij(l̅ilj), where li are charged leptons, is discussed in several models. In a specific two-Z model, with an extra U(1) gauge group corresponding to Le-Lτ (Le,Lτ being the lepton numbers associated with the electron and the τ lepton), large and observable CP asymmetry in e+e→τ+ee+) is shown to be possible at energies reached at the CERN e+e collider and SLAC Linear Collider. Various constraints coming from present experimental data have been taken into account while making this prediction.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:43614
Deposited On:14 Jun 2011 10:53
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