Dirac's Lorentz Covariance

Let us look at some of his papers.


1927. Dirac's First Lorentz Violation


1945. Dirac's Second Lorentz Violation


1963. Dirac's Coupled Oscillators


1949. Dirac's Third Lorentz Violation


These Lorentz Violations disappear if we combine all three Violations.


Feynman's Parton Picture

Lorentz-covariant World

Massive/Slow between Massless/Fast
Energy
Momentum
E=p2/2m Einstein's
E=(m2 + p2)1/2
E=p
Spin, Gauge,
Helicity
S3
S1 S2
Wigner's
Little Group
S3
Gauge Trans.
Quarks
and
Partons
This table is from Y. S. Kim, Phys. Rev. Lett. 63 , 348 (1989).


Proton Form Factors