Dynamical origin and the pole structure of X(3872).
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, QQ 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.
Danilkin
I V
IV
Gesellschaft fur Schwerionenforschung (GSI), Planck Strasse 1, 64291 Darmstadt, Germany. danilkin@itep.ru
Simonov
Yu A
YA