%0 Journal Article
%T Threshold effect and \pi^\pm \psi(2S) peak
%A Rosner
%A Jonathan L.
%J High Energy Physics - Phenomenology
%D 2007
%I 
%R 10.1103/PhysRevD.76.114002
%X A resonance-like structure in the $\pi^\pm \psi(2S)$ mass spectrum arising in $B \to K \pi^\pm \psi(2S)$ has recently been reported. It is noted that the mass of this structure, $4433 \pm 4 \pm 1$ MeV, is not far from the threshold for production of $D^* \bar{D}_1(2420)$. A proposed mechanism for production of this state is suggested, and tests are suggested.
%U http://arxiv.org/abs/0708.3496