3. Show that the time-ordered product of two Dirac fields, at dif- ferent space-time points, is expressible in the form
Posted: Mon May 09, 2022 1:35 pm
3. Show that the time-ordered product of two Dirac fields, at dif- ferent space-time points, is expressible in the form 7" (ya(z)bs()] = 12.30 / 1,4kt os - 160-x) T ( = (+ m)aß eik(y dºk () k2 - m2 + ie where the symbols have their usual significance.