Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-11-24
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX 29 pages, 3 PS figures. Minor comments added, final version to appear in NPB
Scientific paper
10.1016/j.nuclphysb.2008.12.012
We simplify the general form of the fermion-fermion-gauge boson interactions generated by dimension-six gauge-invariant effective operators by using the equations of motion to remove redundant operators. It is found that the most general vertex for off-shell fermions fi, fj and an off-shell boson V=W,Z,gamma,g only involves gamma^mu and sigma^{mu nu} q_nu terms, with q=p_i-p_j. Examples are given for the Wtb, Ztt, gamma tt and gtt interactions, whose general expression is greatly simplified with respect to previous results in the literature. The same arguments apply to top flavour-changing neutral interactions with the Z boson, the photon or the gluon, which can also be parameterised in full generality with only gamma^mu and sigma^{mu nu} q_nu couplings. Explicit expressions are given for these vertices in terms of dimension-six gauge-invariant operators. We also discuss how effective operator coefficients might be determined from eventual measurements of anomalous couplings.
No associations
LandOfFree
A minimal set of top anomalous couplings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A minimal set of top anomalous couplings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A minimal set of top anomalous couplings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-645042