A number of constexpr particle constants to avoid hardcoding them directly in various places.
constexpr double muonMassInMeV
the mass of the muon (in MeV)
constexpr double chargedKaonMassInMeV
the mass of the charged kaon (in MeV)
constexpr double JpsiMassInMeV
constexpr double protonMassInMeV
the mass of the proton (in MeV)
constexpr double KZeroMassInMeV
the mass of the neutral kaon (K0) (in MeV)
constexpr double chargedPionMassInMeV
the mass of the charged pion (in MeV)
constexpr double electronMassInMeV
the mass of the electron (in MeV)
constexpr double piZeroMassInMeV
the mass of the pi zero (in MeV)
constexpr double DZeroMassInMeV
the mass of the D0 meson (in MeV)
constexpr double lambdaMassInMeV
the mass of the lambda baryon (in MeV)
constexpr double BZeroMassInMeV
the mass of the neutral B0 meson (in MeV)
constexpr double BPlusMassInMeV
the mass of the charged B meson (in MeV)
constexpr double BsMassInMeV
the mass of the Bs meson (in MeV)