add new decay logic for lambda1520

Author: hkoley

MC/config/PWGLF/pythia8/generator/lambda1520.cfg

@@ -0,0 +1,10 @@
+### Define resonance
+ProcessLevel:all = off # will not look for the 'process'
+
+# id::all = name antiName spinType chargeType colType m0 mWidth mMin mMax tau0
+102134:all =  Lambda1520 Lambda1520bar 4 0 0 1.51950 0.01560 1.47 1.60 0
+
+### add Resonance decays absent in PYTHIA8 decay table and set BRs from PDG for other
+102134:oneChannel = 1 1.000 0 2212 -321
+102134:onMode = off
+102134:onIfMatch = 2212 -321