The Gerasimov-Drell-Hearn sum rule and the infinite-momentum limit
High Energy Physics - Phenomenology
2011-09-13 v2
Abstract
We study the current-algebra approach to the Gerasimov-Drell-Hearn sum rule, paying particular attention to the infinite-momentum limit. Employing the order-alpha^2 Weinberg-Salam model of weak interactions as a testing ground, we find that the legitimacy of the infinite-momentum limit is intimately connected with the validity of the naive equal-times algebra of electric charge densities. Our results considerably reduce the reliability of a recently proposed modification of the Gerasimov-Drell-Hearn sum rule, originating from an anomalous charge-density algebra.
Keywords
Cite
@article{arxiv.hep-ph/9703368,
title = {The Gerasimov-Drell-Hearn sum rule and the infinite-momentum limit},
author = {R. Pantfoerder and H. Rollnik and W. Pfeil},
journal= {arXiv preprint arXiv:hep-ph/9703368},
year = {2011}
}
Comments
12 pages; 6 figures; LaTeX; submitted to Z.Phys.C