The Evolution of Quantum Field Theory: From QED to Grand Unification
Abstract
In the early 1970s, after a slow start, and lots of hurdles, Quantum Field Theory emerged as the superior doctrine for understanding the interactions between relativistic subatomic particles. After the conditions for a relativistic field theoretical model to be renormalizable were established, there were two other developments that quickly accelerated acceptance of this approach: first the BroutEnglertHiggs mechanism, and then asymptotic freedom. Together, these gave us a complete understanding of the perturbative sector of the theory, enough to give us a detailed picture of what is now usually called the Standard Model. Crucial for this understanding were the strong indications and encouragements provided by numerous experimental findings. Subsequently, nonperturbative features of the quantum field theories were addressed, and the first proposals for completely unified quantum field theories were launched. Since the use of continuous symmetries of all sorts, together with other topics of advanced mathematics, were recognised to be of crucial importance, many new predictions were pointed out, such as the Higgs particle, supersymmetry, and baryon number violation. There are still many challenges ahead.
 Publication:

The Standard Theory of Particle Physics: Essays to Celebrate CERN's 60th Anniversary
 Pub Date:
 October 2016
 DOI:
 10.1142/9789814733519_0001
 arXiv:
 arXiv:1503.05007
 Bibcode:
 2016stpp.conf....1T
 Keywords:

 High Energy Physics  Theory;
 High Energy Physics  Phenomenology;
 Physics  History and Philosophy of Physics
 EPrint:
 25 pages in total. A contribution to: The Standard Theory up to the Higgs discovery  60 years of CERN  L. Maiani and G. Rolandi, eds