Make the width optional in a 'Particle' statement, as in EvtGen

scikit-hep · Jan 9, 2024 · c979065 · c979065
1 parent 336b305
commit c979065
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/decaylanguage/data/decfile.lark b/src/decaylanguage/data/decfile.lark
@@ -26,7 +26,7 @@ cdecay : "CDecay" LABEL
 
 define : "Define" LABEL SIGNED_NUMBER
 
-particle_def: "Particle" LABEL SIGNED_NUMBER SIGNED_NUMBER // Set the mass and width of a particle (in GeV)
+particle_def: "Particle" LABEL SIGNED_NUMBER SIGNED_NUMBER? // Set the mass and width (optional) of a particle (in GeV)
 
 alias : "Alias" LABEL LABEL