[PWGDQ] Add X(3872) MC Signal (#9415)

Co-authored-by: ALICE Action Bot <alibuild@cern.ch>

Author: labranch94

PWGDQ/Core/MCSignalLibrary.cxx

@@ -1484,6 +1484,12 @@ MCSignal* o2::aod::dqmcsignals::GetMCSignal(const char* name)
 
   //--------------------------------------------------------------------------------
 
+  if (!nameStr.compare("X3872")) {
+    MCProng prong(1, {9920443}, {true}, {false}, {0}, {0}, {false});
+    signal = new MCSignal(name, "Inclusive X(3872)", {prong}, {-1});
+    return signal;
+  }
+
   if (!nameStr.compare("JpsiFromX3872")) {
     MCProng prong(1, {443}, {true}, {false}, {0}, {0}, {false}, false, {9920443}, {false});
     signal = new MCSignal(name, "Jpsi from X3872", {prong}, {-1});