Chiral Sum Rules and their Phenomenology

por Karl Schilcher (Institut fur Physik. Universitat Mainz)

martes 3 oct. 2000 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

A set of well known chiral sum rules, expected to be valid in QCD is confronted with data from the ALEPH detector. The Das-Mathur-Okubo sum rule, the first and second Weinberg sum rule and the Glashow-Schnitzer-Weinberg sum rule are not well saturated by the data. Instead a modified set of sum rules with suitable weight factors is proposed and motivated, which is saturated precociously to a remarkable extend. A new explanation of the Delta(I)=1/2 rule is obtained from the chiral sum rules.