Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-05-30
Phys.Rev. D53 (1996) 4875-4885
Physics
High Energy Physics
High Energy Physics - Phenomenology
footnote pg. 4 changed, acknowledgments extended
Scientific paper
10.1103/PhysRevD.53.4875
We discuss the influence of anomalous tbar-t-G couplings on total and differential tbar-t production cross sections in hadron-hadron collisions. We study in detail the effects of a chromoelectric and a chromomagnetic dipole moment, d' and \mu', of the top quark. In the d'-\mu' plane, we find a whole region where the anomalous couplings give a zero net contribution to the total top production rate. In differential cross sections, the anomalous moments have to be quite sizable to give measurable effects. We estimate the values of d' and \mu' which are allowed by the present Tevatron experimental results on top production. A chromoelectric dipole moment of the top violates CP invariance. We discuss a simple CP-odd observable which allows for a direct search for CP violation in top production.
Haberl Peter
Nachtmann Otto
Wilch André
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