  We developed a Friedrichs-model-like scheme in studying the hadron resonance
phenomenology and present that the hadron resonances might be regarded as the
Gamow states produced by a Hamiltonian in which the bare discrete state is
described by the result of usual quark potential model and the interaction part
is described by the quark pair creation model. In a one-parameter calculation,
the $X(3862)$, $X(3872)$, and $X(3930)$ state could be simultaneously produced
with a quite good accuracy by coupling the three P-wave states,
$\chi_{c2}(2P)$, $\chi_{c1}(2P)$, $\chi_{c0}(2P)$ predicted in the
Godfrey-Isgur model to the $D\bar D$, $D\bar D^{*}$, $D^*\bar D^*$ continuum
states. At the same time, we predict that the $h_c(2P)$ state is at about 3902
MeV with a pole width of about 54 MeV. In this calculation, the $X(3872)$ state
has a large compositeness. This scheme may shed more light on the long-standing
problem about the general discrepancy between the prediction of the quark model
and the observed values, and it may also provide reference for future search
for the hadron resonance state.
