void set_4momentum(const FourVector &momentum_vector)
Set the particle's 4-momentum directly.
void boost_momentum(const ThreeVector &v)
Apply a Lorentz-boost to only the momentum.
static double diff_width(double m_par, double m_l, double m_dil, double m_other, ParticleTypePtr other, ParticleTypePtr t)
Get the mass-differential width for a dilepton Dalitz decay, where is the invariant mass of the lep...
const ParticleType & type() const
Get the type of the particle.