Electric dipole transitions of heavy quarkonium in pNRQCD

Abstract

We propose a systematic, model-independent treatment of electric dipole transitions of heavy quarkonium. Within an effective field theory, concretely potential non-relativistic QCD, the relativistic corrections of relative order $v^2$ to the decay rate are derived. An existing formalism developed for M1 decays will be extended for our purpose. We scrutinize and complement former results from potential model calculations.

Comments: 6 pages, 4 figures. Proceedings of the XIV International Conference on Hadron Spectroscopy (Hadron2011), 13-17 June 2011, Munich, Germany (eConf C110613), minor changes