Add dec files for D+ -> K pi l nu using BESIII model
Forces the decay of D+ to K- pi+ l+ nu. Requires products to be in LHCb acceptance. Decay model based on BESIII paper [Phys.Rev.D 94 (2016) 3, 032001]. See the following line for detailed generator info: lhcb/Gauss!495 (merged)
Edited by Liang Sun