class PChannel: public TObject

 Channel constructor by particle array

 Channel constructor by decay-mode index

 Channel constructor by decay-mode index and parent reference

 Channel destructor

 sets on the first call all parent, siblings etc IDs. This
 has to be done only once per PReaction

 cleans the channel, so an init will be done in the next decay()

 N-body phase-space decay function based on the CERNLIB routine
 GENBOD. Resonance and dilepton masses (for Dalitz decays)
 are sampled in PData. Scattering angles are sampled here, for
 selected channels (see idChannel).

kept for comp.

 address of array of pointers to the channel particles

 address of array of channel-particle ids

 number of decay products

******for distribution handling:

 return -1 if distribution does not match the channel

******for quasi-elastic handling:

 1 or 2 for elementary or quasi particles respectively

returns the decay mode index of this channel

 status message

  double ds_dt(double);
 ...> moved to PParticle (IF)
 ds/dt(cos_th_cm) in the cm for N+N->N+Delta. With the mass of Delta
 sampled independently in PData, the simulated events are distributed
 as ds/dOmega (normalized). Ref: NPA459 (1986) 503

this is for envelope distributions:

 if a reaction channel identify beam, target, and decay mode

 identify reaction channel of known angular distribution
 these are: p+p->p+p (elastic), N+N->N+Delta, pi+N->N+w, pi+ + P -> pi+ + P + w

 parent is midrapidity thermal source

 parent is file input interface

 parent is a sampled dilepton

 N-body phase-space decay of a particle in its rest frame.
 This follows the CERNLIB routine GENBOD, in C++