Decay rates of Quarkonia in the NRQCD formalism

Abstract

Decay rates of $c\bar{c}$ and $b\bar{b}$ mesons have been studied within the NRQCD formalism. The basic parameters of the formalism have been obtained from different potential schemes studied for the quarkonia spectra. The present results are compared with other potential model results with and without correction terms proposed through hard gluon processes involved in the decay.

4 pages,Presented in the Fifth International Conference on Perspectives in Hadronic Physics, ICTP, Trieste, Italy, May 2006, To be appear in Nuclear Physics A