Add Xib0_Xic+Ds,pKpi,KKpi=DecProdCut.dec
Add a Decfile for the decay Xib0 -> Xic+ Ds with Xic+ -> p K pi and Ds -> K K pi, decay products in acceptance. Xic+ decays to p+ K- pi+ (p+ K*(892)0 resonance included):
- Xib0 -> Xic+(->p+ K- pi+) Ds(->K K pi)