In the theory of the Dirac equation and in the standard model, the neutrino is massless. Both these theories use Lorentz invariance. In modern approaches however, spacetime is no longer smooth, and this modifies special relativity. We show how such a modification throws up the mass of the (electron) neutrino.

We derive a new exact evolution equation for the scale dependence of an effective action. The corresponding equation for the effective potential permits a useful truncation. This allows one to deal with the infrared problems of theories with massless modes in less than four dimensions which are relevant for the high temperature phase transition in ...

The chapter is devoted to General Relativity. The goal is to rigorously arrive at the equations that describe the structure of relativistic stars — the Oppenheimer–Volkoff equations —, the form that Einstein’s equations take for spherical static stars. Two important facts emerge immediately. No form of matter whatsoever can support a relativistic s...

Aitchison, Ian J. R.Close, Frank E.Gal, AvrahamMillener, D. John

Professor Richard H. Dalitz passed away on January 13, 2006. He was almost 81 years old and his outstanding contributions are intimately connected to some of the major breakthroughs of the 20th century in particle and nuclear physics. These outstanding contributions go beyond the Dalitz Plot, Dalitz Pair and CDD poles that bear his name. He pioneer...

We expound an alternative to the Copenhagen interpretation of the formalism of nonrelativistic quantum mechanics. The basic difference is that the new interpretation is formulated in the language of epistemological realism. It involves a change in some basic physical concepts. The $\psi $ function is no longer interpreted as a probability amplitude...