CP-violation in the production of -leptons at TESLA with beam polarizationB. Ananthanarayan1, S.D. Rindani2 and A. Stahl3
1 Centre for Theoretical Studies, Indian Institute of Science, Bangalore 560 012, India
2 Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India
3 DESY, Platanenallee 6, 15738 Zeuthen, Germany
(Received: 13 June 2002 / Revised version: 17 October 2002 Published online: 20 December 2002)
We study the prospects of discovering CP-violation in the production of leptons in the reaction at TESLA, an e+e- linear collider with center-of-mass energies of 500 or even 800 GeV. Non-vanishing expectation values of certain correlations between the momenta of the decay products of the two leptons would signal the presence of CP-violation beyond the standard model. We study how longitudinal beam polarization of the electron and positron beams will enhance these correlations. We find that T-odd and T-even vector correlations are well suited for the measurements of the real and imaginary parts of the electric dipole form factors. We expect measurements of the real part with a precision of roughly 10-20 e cm and of the imaginary part of 10-17 e cm. This compares well with the size of the expected effects in many extensions of the standard model.
© Società Italiana di Fisica, Springer-Verlag 2003