Dimension-six CP-violating operators of the third-family quarks and their effects at colliders
Abstract
We listed all possible dimension-six CP-violating
S
U
c
(3)×S
U
L
(2)×
U
Y
(1)
invariant operators involving the third-family quarks, which can be generated by new physics at a higher energy scale. The expressions of these operators after electroweak symmetry breaking and the induced effective couplings
Wt
b
¯
,
Xb
b
¯
and
Xt
t
¯
(X=Z,γ,g,H)
are also presented. We have evaluated sample contributions of these operators to CP-odd asymmetries of transverse polarization of top quark in single top production at the upgraded Tevatron, the similar effect in top-antitop pair production at the NLC, and the CP-odd observables of momentum correlations among the top quark decay products at the NLC. The energy and luminosity sensitivity in probing these CP-violating new physics has also been studied.