Precise determination of the eta_c mass and width in the radiative J/Psi -> eta_c gamma decay

Abstract

We present an effective field theory based extraction of the eta_c mass and width from a recent measurement by CLEO of the photon line shape in J/Psi -> eta_c gamma decay.

Comments: 3 pages, 3 figures, contribution to 'Quark Confinement and the Hadron Spectrum IX', Univ. Complutense de Madrid, August 30th-September 3rd, 2010