ABSTRACT
Recall the two-component spinor, whose behavior under space rotations of angle θ about unit vector n was described by the operator exp (iθn · M), where M = (1/2)σ. In Problem 21-3 you were concerned with the behavior of this spinor under Lorentz transformation. As was the case in space rotations it is sufficient to consider infinitesimal transformations. We write the corresponding operator as 1 + i ( v / c ) ⋅ N https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429492501/e6a0c676-1f8d-4684-97a0-6bf3353f7ce0/content/eq413.tif"/>
