The dynamical mechanism of channel coupling with the decay channels is applied to the case of coupled charmonium - DD∗ states with JPC=1++. A pole analysis is done and the DD∗ production cross section is calculated in qualitative agreement with experiment. The sharp peak at the D0D0∗ threshold and flat background are shown to be due to Breit-Wigner resonance, shifted by channel coupling from the original position of 3954 MeV for the 23P1, QQˉ state. A similar analysis, applied to the n=2, 3P2, 1P1, 3P0, allows us to associate the first one with the observed Z(3930) J=2 and explains the destiny of 3P0.
@article{arxiv.1006.0211,
title = {Dynamical origin and the pole structure of X(3872)},
author = {I. V. Danilkin and Yu. A. Simonov},
journal= {arXiv preprint arXiv:1006.0211},
year = {2014}
}
Comments
5 pages, 4 figures. Accepted for publication in Phys. Rev. Lett