Alladi Ramakrishnan Hall

Charge Renormalization due to Graviton Loops

Gaurav Narain

IMSc

The leading term in perturbation theory to the beta function of the gauge
couplings comes due to interaction with gravitons. It is seen to be a
universal quantity for all gauge theories to all loops. Using self duality
property of abelian gauge theories in four dimensions, we show that this
contribution is identically zero to all loops.