ar X iv : h ep - p h / 96 06 39 7 v 1 2 0 Ju n 19 96
نویسندگان
چکیده
A complete characterization of all the possible effective interactions up to dimension 5 of the top and bottom quarks with the electroweak gauge bosons have been made within the context of the chiral Lagrangian. We show that the anomalous dimension 5 operators (19 in total) can contribute to the leading energy power (E 3 for fermion pairs with same sign helicities and E 2 for opposite sign helicities) of the V L V L → tt or tb amplitudes. Hence, they are sensitive to the electroweak symmetry breaking sector based on the equivalence (Goldstone Equivalence Theorem) between the longitudinal weak boson and the corresponding would-be Goldstone boson in high energy collisions. We also show the top quark production rates at the LHC and the LC via V L V L fusion processes. If no anomalous production rate is found, then these coefficients can be bound (based on the naive dimensional analysis) to be of order 10 −2 or 10 −1. This is about an order of magnitude more stringent than the bounds for the next-to-leading order bosonic operators commonly studied in V L V L → V L V L scatterings. The effect on a CP-odd observable is also briefly discussed.
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