EntityQ568855· pop 23· linked from 71 articleshelicitySign in to saveprojection of spin along the direction of momentumConnectionsphysicsEntityquantum mechanicsEntityInternational Standard Book NumberEntityUniversity of CambridgeEntityphotonEntityEuclidean vectorEntitymomentumEntityweak interactionEntityspinEntityLorentz transformationEntityconservation lawEntityeigenvectors and eigenvaluesEntityHamiltonian operatorEntitygroup actionEntityangular momentum operatorEntitymassless quantum particleEntitychiralityEntityanyonEntityLorentz scalarEntityWeyl equationEntityCategoriesQuantum field theory