Conveners
Session 6
- David Rodriguez Entem (Universidad de Salamanca)
In this talk we would like to discuss a few aspects developed recently in 2011.00978 and 2010.13709. In the former work we study three approaches to dwell on the nature of the X(6900) from S-matrix techniques without assuming a specific dynamical model. We connect them, as well as with other techniques in the literature, and conclude that the J/psi-J/psi event distribution as measured by the...
I will describe a general procedure to build an effective theory for exotic hadrons with two heavy quarks at NLO in the 1/m expansion, m being the heavy quark mass. No assumption is made on the relative size of the bound state beyond the small velocity of the heavy quark motion. The effective theory needs a number of potentials as an input. I present an application to double heavy baryons for...
Assuming the isospin conservation, the electromagnetic amplitudes of the decays $\psi \to \Lambda \overline \Sigma^0 + \rm{c.c.}$, where $\psi=J/\psi, \psi(2S)$, and of the processes $e^+e^- \to \Lambda \overline \Sigma{}^0 + \rm{c.c.}$ at the $\psi$ mass are parametrized by the same coupling. By using BESIII and BABAR data we find a substantial discrepancy between the values of the modulus of...
