The process $\epem\to J/ \psi X(3940)$ at $\sqrt s = 10.6$ GeV in the   framework of light cone formalism
  This paper is devoted to the study of the process $\epem\to J/\psi X(3940)$ in the framework of light cone formalism. In our calculation two hypotheses about the structure of X(3940) meson are considered: X(3940) is $3^1$S$_0$ state and X(3940) is one of $2^3$P states. The former hypothesis leads to a good agreements with the cross section measured at the experiment. As to the latter one, it is proposed a mechanism that allows one to understand the suppression of 2P mesons production in hard processes. 
V. V. Braguta, A. K. Likhoded, A. V. Luchinsky