947
975
VectorPropagatorMassless= lambda l1, l2, part: complex(0,-1) * Metric(l1, l2)
949
978
Spin3halfPropagatorin = lambda mu, nu, s1, s2, part: (\
950
979
-1/3 * (Gamma(mu,s1,-2) + Identity(s1, -2) * P(mu, part) * Mass(part) * OverMass2(part))* \
951
980
(PSlash(-2,-3, part) - Identity(-2,-3) * Mass(part)) * \