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# Renormalisation Group Improved Thermal Coupling Constant In An External Field

Ganguly, Avijit K (1998) Renormalisation Group Improved Thermal Coupling Constant In An External Field. [Preprint]

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## Abstract

Starting from renormalised Effective Lagrangian, in the presence of an external Chromo-Electric field at finite temperature, the expression for thermal coupling constant ($\alpha = (g^2)/(4 \pi)$) as a function of temperature and external field is derived, using finite temperature two parameter renormalisation group equation of Matsumoto, Nakano and Umezawa. For some values of the parameters, the coupling constant is seen to be approaching a value $\sim unity$.

Item Type: Preprint Effective action;Coupling Constant;Renormalisation Division of Physical & Mathematical Sciences > Centre for Theoretical Studies 13 Aug 2004 19 Sep 2010 04:13 http://eprints.iisc.ernet.in/id/eprint/861

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