# FILE:  Lambda_c+_pKpi.dec
# PURPOSE:  force Lambda_c to decay to pKpi using Phase Space only 
#           (no resonances)
#           Also make Upsilon decay to only B pairs without mixing,
#           add make the continuum virtual photon (vpho) go to ccbar
#           (quark #4).
#
#   This was meant to be used in either continuum or Upsilon(4S)
#   generation to study the plain phase space of the Lambda_c
#   decay to p K pi.  Since Lambda_c are not produced in uds,
#   only charm quarks need to be produced from continuum.
#
#   Only one Lambda_c per event was wanted, since all decays forced to pKpi,
#   and it is unlikely that one ever wanted events with 2 Lambda_c, both
#   going to p K pi. Hence so no mixing was allowed.
#
#   The filter then can ask for a Lambda_c+ or an anti-Lambda_c-.  If
#   mixing was allowed, then you would get events with 2 Lambda_c+s
#   if one B mixed and both Bs decayed to Lambda_c.  
#
# AUTHOR: Chris Roat croat@stanford.edu

#
# Decay 4S with no mixing, equal amounts of B+B- and B0B0bar
#
Decay Upsilon(4S)
0.50000	B+	B-	VSS;
0.50000	B0	anti-B0	VSS;
Enddecay

#
# Force the vpho fragmentation to produce a ccbar pair
#
Decay vpho
1.0	JSCONT	4;
Enddecay

#
# Force all Lambda_c decays to p K pi, using phase space
# 

Decay Lambda_c+
1.000	p+	K-	pi+	PHSP;
Enddecay

CDecay anti-Lambda_c-

End