The anomalous chromomagnetic dipole moment of the top quark in the standard model and beyond

Details The anomalous chromomagnetic dipole moment of the top quark in the standard model and beyond The anomalous chromomagnetic dipole moment of the top quark in the standard model and beyond

2001-09-13

arxiv.org/abs/hep-ph/0109109v3

Phys.Rev. D65 (2002) 057301

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex4, Version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.057301

The anomalous chromomagnetic moment of the top quark arises from one loop corrections to the vertex $\bar t t g$. We give explicit formulae for this anomalous coupling in the framework of the standard model, the two Higgs doublet model and the minimal supersymmetric standard model. We compare the results for the anomalous coupling with the bound $-0.03 \leq \Delta \kappa \leq 0.01$ emerging from the analysis of $b \to s \gamma$ process with an on-shell bremsstrahlung gluon. This enables us to study the allowed region of parameters of the models under consideration.

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