Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-03-19
Eur.Phys.J.C1:585-592,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages; 6 figures; LaTeX; submitted to Z.Phys.C
Scientific paper
10.1007/s100520050107
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.
Pantfoerder Ralf
Pfeil W.
Rollnik H.
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