checkNormalizedEmitt.cc

  /*
      // defaults (Run-3)
      double pMass = 0.938; // GeV (proton)
      double E = 6800; // GeV (beam energy)

      std::regex pattern("20\\d{2}"); // Regular expression pattern to match "20" followed by two digits
      std::smatch matches;

      if (std::regex_search(tagname, matches, pattern)) {
        int secondTwoDigits = std::stoi(matches[1].str());        
        if (secondTwoDigits <= 11) {
	  E = 3500.;
        } else if (secondTwoDigits == 12) {
	  E = 4000.;
        } else if (secondTwoDigits > 12 && secondTwoDigits < 19) {
	  E = 6500.;
        } else if (secondTwoDigits >= 19) {
          E = 6800.;
        }
      } 
      
      if (tagname.find("HI") != std::string::npos || tagname.find("PbPb") != std::string::npos) {
	pMass = 193.7; // GeV (lead)
	E = 522340.;
      }

      double gammaFact = E / pMass;
      */