TY - JOUR

T1 - Matching Regge theory to the OPE

AU - Afonin, S. S.

AU - Andrianov, Alexander A.

AU - Andrianov, Vladimir A.

AU - Espriu, Domenec

PY - 2004/4/1

Y1 - 2004/4/1

N2 - The spectra of masses and decay constants for non-strange meson resonances in the energy range 0-2.5GeV is analyzed. It is known from meson phenomenology that for given quantum numbers these spectra approximately follow linear trajectories with a universal slope. These facts can be understood in terms of an effective string description for QCD. For light meson states the trajectories deviate noticeably from the linear behavior. We investigate the possible corrections to the linear trajectories by matching two-point correlators of quark currents to the Operator Product Expansion (OPE). We find that the allowed modifications to the linear Regge behavior must decrease rapidly with the principal quantum number. After fitting the lightest states in each channel and certain low-energy constants the whole spectrum for meson masses and residues is obtained in a satisfactory agreement with phenomenology. We briefly speculate on possible implications for the QCD effective string.

AB - The spectra of masses and decay constants for non-strange meson resonances in the energy range 0-2.5GeV is analyzed. It is known from meson phenomenology that for given quantum numbers these spectra approximately follow linear trajectories with a universal slope. These facts can be understood in terms of an effective string description for QCD. For light meson states the trajectories deviate noticeably from the linear behavior. We investigate the possible corrections to the linear trajectories by matching two-point correlators of quark currents to the Operator Product Expansion (OPE). We find that the allowed modifications to the linear Regge behavior must decrease rapidly with the principal quantum number. After fitting the lightest states in each channel and certain low-energy constants the whole spectrum for meson masses and residues is obtained in a satisfactory agreement with phenomenology. We briefly speculate on possible implications for the QCD effective string.

KW - 1/N Expansion

KW - Phenomenological Models

KW - QCD

KW - Sum Rules

UR - http://www.scopus.com/inward/record.url?scp=23044447477&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:23044447477

VL - 8

SP - 893

EP - 917

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 4

ER -