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

Nora Brambilla (1) , Pablo Roig (2) , Antonio Vairo (1)

1 Physik Department [Garching]
2 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]

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.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Phénoménologie [hep-ph]

Nora Brambilla, Pablo Roig, Antonio Vairo. Precise determination of the eta_c mass and width in the radiative J/Psi -> eta_c gamma decay. 2010. ⟨hal-00545191⟩