Adding D2KPiEta DecFile

dkfiles/Dst_D0pi,Kpieta=TightCut,tighter,Coctail.dec

+# EventType: 27263477
+# 
+# Descriptor: { [D*+ -> (D0 -> (anti-K*0 -> K- pi+) (eta -> gamma gamma) ) pi+]cc, [D*+ -> (D0 -> (anti-K*0_0 -> K- pi+) (eta -> gamma gamma) ) pi+]cc, [D*+ -> (D0-> K- (a_0+ -> pi+ (eta -> gamma gamma)) ) pi+]cc }
+#
+# NickName: Dst_D0pi,Kpieta=TightCut,tighter,Coctail
+#
+# Cuts: LoKi::GenCutTool/TightCut
+#
+# Documentation:
+#   Decay file for D* -> D0 pi+
+#   where D0 decays to right-sign mode (K- pi+ eta)
+#   with incoherent resonance Coctail based on Belle result arXiv:2003.07759
+# EndDocumentation
+#
+# PhysicsWG: Charm
+# Tested: Yes
+# Responsible: Jolanta Brodzicka
+# Email: Jolanta.Brodzicka@cern.ch
+# Date: 20211018
+# CPUTime: <1min
+#
+# InsertPythonCode:
+# #
+# from Configurables import LoKi__GenCutTool
+# from Gauss.Configuration import *
+# gen = Generation()
+# gen.SignalPlain.addTool ( LoKi__GenCutTool , 'TightCut' )
+# tightCut = gen.SignalPlain.TightCut
+# tightCut.Decay     = '[ D*(2010)+ => ^( D0 ==> ^K- ^pi+ ^( eta -> ^gamma ^gamma ) ) ^pi+]CC'
+# tightCut.Preambulo += [
+#     'from GaudiKernel.SystemOfUnits import MeV     ',
+#     'inAcc       = in_range ( 0.005 , GTHETA , 0.400 ) ',
+#     'inCaloAcc   = ( in_range(0.000, abs(GPX/GPZ), 0.300) & in_range(0.000, abs(GPY/GPZ), 0.250) & (GPZ > 0) )',
+#     'goodD0Eta   = ( GINTREE( ("gamma"==GABSID) & (GPT > 1200 * MeV) & inAcc & inCaloAcc ) )',
+#     'goodD0K     = ( ("K-"==GABSID) & (GPT > 400 * MeV) & inAcc )',
+#     'goodD0Pi    = ( ("pi+"==GABSID) & (GPT > 400 * MeV) & inAcc )',
+#     'goodD0      = ( (GPT > 1600 * MeV) & GINTREE(goodD0K) & GINTREE(goodD0Pi) & GINTREE(goodD0Eta) )'
+# ]
+# tightCut.Cuts      =    {
+#     '[pi+]cc'  : 'inAcc ',
+#     '[D0]cc'   : 'goodD0 '
+#     }
+# EndInsertPythonCode
+
+Alias MyD0 D0
+Alias MyantiD0 anti-D0
+ChargeConj MyD0 MyantiD0
+#
+Alias      MyK*0 K*0
+Alias      Myanti-K*0 anti-K*0
+ChargeConj MyK*0 Myanti-K*0
+#
+#
+Alias      Mya0+ a_0+
+Alias      Mya0- a_0-
+ChargeConj Mya0+ Mya0-
+#
+Alias      MyK*0(1430) K_0*0
+Alias      Myanti-K*0(1430) anti-K_0*0
+ChargeConj MyK*0(1430) Myanti-K*0(1430)
+#
+#
+Alias      Myeta  eta
+#
+Decay D*+sig
+  1.000 MyD0  pi+    VSS;
+Enddecay
+CDecay D*-sig
+
+Decay MyD0
+0.48   Myanti-K*0 Myeta  SVS;
+0.32   Myanti-K*0(1430) Myeta  PHSP;
+0.39   K- Mya0+ PHSP;
+Enddecay
+CDecay MyantiD0
+#
+Decay Myanti-K*0
+1.0   K- pi+      VSS;
+Enddecay
+CDecay Myanti-K*0
+#
+Decay Myanti-K*0(1430)
+1.0   K- pi+     PHSP;
+Enddecay
+CDecay Myanti-K*0(1430)
+#
+Decay Mya0+
+1.0   pi+ Myeta      PHSP;
+Enddecay
+CDecay Mya0-
+#
+Decay Myeta
+1.0     gamma gamma      PHSP;
+Enddecay
+#
+End
+