Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar

Details Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar

1997-09-03

arxiv.org/abs/hep-ph/9709225v1

Phys.Rev. D57 (1998) 5444-5452; Erratum-ibid. D61 (2000) 119902

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, LaTeX, 3 figures in postscript files (included), macros file included

Scientific paper

10.1103/PhysRevD.57.5444

CP-violating asymmetries due to a possible electric dipole interaction of the top quark in the production and subsequent decay of top quark-top antiquark pair in photon-photon collisions are studied. The asymmetries defined can be used to determine the imaginary part of the electric dipole form factors. A gamma-gamma collider with photon beams generated from laser back-scattering off electron beams with an integrated geometric luminosity of 20 fb^{-1} can put a limit of the order of 10^{-17} e cm on the imaginary part of the electric dipole form factor of the top quark if the electron beams have longitudinal polarization and the laser beams have circular polarization.

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