void Lorentz() { // gamma + p -> gamma ' + p ' TLorentzVector proton(0,0,0,0.938); TLorentzVector photon(1,0,0,2); proton.Print(); photon.Print(); TLorentzVector CM=proton+photon; CM.Print(); CM.Vect().Print(); v= CM.Vect(); TLorentzVector protonCM; TLorentzVector photonCM; protonCM=proton; protonCM.Boost(-v); photonCM=photon; photonCM.Boost(-v); protonCM.Print(); photonCM.Print(); }