CP-violating dipole form factors of the top quark and tau lepton in scalar leptoquark models

Abstract

We calculate the CP-violating electric and weak dipole form factors of the top quark and the tau lepton in models with scalar leptoquarks coupling only to the third generation of quarks and leptons. We obtain numerical values of the real and imaginary parts of these form factors at various energies for different values of leptoquark masses and couplings. The existing limits on the tau electric and weak dipole form factors allows us to put a limit on the masses and couplings of such leptoquarks and therefore on the top electric and weak dipole form factors. We also discuss constraints on the form factors coming from indirect limits on leptoquark masses and couplings deduced from LEP results on Z properties.

22 pages, LaTeX, includes 14 figures in postscript files

References in corpus (5)

• Pursuing interpretations of the HERA large-Q2 data
• CP Violation, Top Quarks and the Tevatron Upgrade
• Search for Charge 1/3 Third Generation Leptoquarks in pbarp Collisions at sqrt(s)=1.8 TeV
• What Can We Learn About Leptoquarks At LEP200?
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• The electric dipole moment of the tau lepton revisited
• Trilinear Neutral Gauge Boson Couplings
• Single decay-lepton angular distributions in polarized e+e- --> t tbar and simple angular asymmetries as a measure of CP-violating top dipole couplings
• Transverse beam polarization and limits on leptoquark couplings in e+e- --> t tbar
• Static weak dipole moments of the $\tau$ lepton via renormalizable scalar leptoquark interactions