Added Xib0 -> psi2SXi0,mm DecFile

dkfiles/Xib0_psi2SXi0,mm,Lambdapi0=phsp,DecProdCut.dec

+# EventType: 16144541
+#
+# Descriptor: [Xi_b0 -> (Xi0 -> (Lambda0 -> p+ pi-) (pi0 -> gamma gamma) )  (psi(2S) -> mu+ mu-)]cc
+#
+# NickName: Xib0_psi2SXi0,mm,Lambdapi0=phsp,DecProdCut
+#
+# Cuts: DaughtersInLHCb
+#
+# Documentation: Xib0 decay to psi(2S)Xi0,  Xi0 forced to go Lambda pi0, Lambda forced to go to p pi.
+# EndDocumentation
+#
+# PhysicsWG: RD
+# Tested: Yes
+# Responsible: Niladri Sahoo
+# Email: Niladri.Sahoo@cern.ch
+# Date: 20211025
+# CPUTime:<1min
+#
+Alias           MyPi0           pi0 
+ChargeConj      MyPi0           MyPi0
+#
+Alias      MyXi0     Xi0
+Alias      Myanti-Xi0 anti-Xi0
+ChargeConj Myanti-Xi0 MyXi0
+#
+Alias      MyLambda      Lambda0
+Alias      Myanti-Lambda anti-Lambda0
+ChargeConj Myanti-Lambda MyLambda
+#
+Alias      Mypsi2S       psi(2S)
+ChargeConj Mypsi2S       Mypsi2S
+# 
+Decay Xi_b0sig 
+  1.000    MyXi0       Mypsi2S      PHSP;
+Enddecay
+CDecay anti-Xi_b0sig
+#
+Decay Mypsi2S
+  1.000     mu+  mu-                PHOTOS VLL;
+Enddecay
+#
+Decay MyXi0
+  1.000     MyLambda  MyPi0         HELAMP   0.571   0.0   0.821   0.0;
+Enddecay
+CDecay Myanti-Xi0
+#
+Decay MyLambda
+  1.000   p+          pi-           HELAMP   0.936   0.0   0.351   0.0;
+Enddecay
+CDecay Myanti-Lambda
+#
+Decay MyPi0
+  1.000   gamma	    gamma           PHSP;
+Enddecay
+#
+End
+#
+