Richard James Petti

3 Questions 14 Answers 0 Followers

Questions related from Richard James Petti

What interactions in quantum field theory combine two particles of spin 1/2 and - 1/2, mediated by a virtual particle, so the products have 0 spin?

What interaction(s) in quantum field theory combines two particles of spin 1/2 and - 1/2, mediated by a virtual particle, so the products have no spin? Is the virtual intermediary known to carry...

02 February 2019 5,980 14 View

Is the classical limit of the string version of gravity general relativity or Einstein-Cartan theory?

The classical limit of loop quantum gravity is Einstein-Cartan theory (EC), not general relativity (GR). I would like to know whether the other main approach to quantum gravity - string theory -...

05 May 2015 4,084 12 View

Do you know of any case in which physicists accepted a basic theory based on a derivation from accepted theories, or its mathematical structure?

Kuhn says leading physicists accepted Newton's theory of gravitation before astronomical measurements were accurate enough to decide the issue ["Structure of Scientific Revolutions" 1962]. Other...

03 March 2015 3,729 28 View