Added Lithium4

Author: GiorgioAlbertoLucia

Common/Constants/include/CommonConstants/PhysicsConstants.h

@@ -76,6 +76,7 @@ enum Pdg {
   kTriton = 1000010030,
   kHelium3 = 1000020030,
   kAlpha = 1000020040,
+  kLithium4 = 1000030040,
   kHyperTriton = 1010010030,
   kHyperHydrogen4 = 1010010040,
   kHyperHelium4 = 1010020040,
@@ -129,6 +130,7 @@ constexpr double MassDeuteron = 1.87561294257;
 constexpr double MassTriton = 2.80892113298;
 constexpr double MassHelium3 = 2.80839160743;
 constexpr double MassAlpha = 3.7273794066;
+constexpr double MassLithium4 = 3.751304;
 constexpr double MassHyperTriton = 2.99131;
 constexpr double MassHyperHydrogen4 = 3.9226;
 constexpr double MassHyperHelium4 = 3.9217;