Speaker
Ishita Dutta Choudhury
(S N Bose National Centre for Basic Sciences)
Description
We investigate the effect of a small gauge-invariant mass of the gluon on anomalous chromomagnetic moment of quarks (ACM), by perturbative calculations at one-loop. We use the topological mass generation mechanism, in which the gluon acquires a mass via an interaction with an antisymmetric tensor field $B_{\mu \nu}$. For a small gluon mass $(M_g <10$ MeV), we give our results at momentum transfer $q^2=-M_Z^2$. We find that the gluon mass dependence is most evident for the up quark ACM. For other light quarks, the variation of ACM is around $20$ percent. Among heavy quarks, the top quark ACM shows significant variation with gluon mass.
Reference:
Ishita Dutta Choudhury, Amitabha Lahiri, arXiv:1409.0073v2 [hep-ph], (Accepted for publication in Mod. Phys. Lett. A).
Authors
Prof.
Amitabha Lahiri
(S N Bose National Centre for Basic Sciences, Kolkata-700098,India)
Ishita Dutta Choudhury
(S N Bose National Centre for Basic Sciences)
