Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-11-09
Phys.Lett. B482 (2000) 87-92
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 2 figures
Scientific paper
10.1016/S0370-2693(00)00536-0
The gap Delta = 4 pi f_pi ~ 1.2 GeV of spontaneous chiral symmetry breaking is introduced as a scale delineating resonance and continuum regions in the QCD spectral sum rules for vector mesons. Basic current algebra results are easily recovered, and accurate sum rules for the lower moments of the spectral distributions are derived. The in-medium scaling of vector meson masses finds a straightforward interpretation, at least in the narrow width limit.
Marco Enric
Weise Wolfram
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