Scalar mesons within QCD sum rules in the planar limit

Journal Article · Sun Aug 31 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2973495· OSTI ID:21149163

Afonin, S S; Andrianov, V A ^[1]; Andrianov, A A ^[1]; Espriu, D

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1. Ulyanovskaya ul. 1, 198905 St. Petersburg (Russian Federation)

The spectra of masses and decay constants for non-strange scalar mesons in the energy range 0-2.5 GeV 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 scalar meson masses and residues is obtained in a satisfactory agreement with phenomenology.

• OSTI ID: 21149163
• Journal Information: AIP Conference Proceedings, Vol. 1030, Issue 1; Conference: SCADRON70: Workshop on scalar mesons and related topics honoring Michael Scadron's 70. birthday, Lisbon (Portugal), 11-16 Feb 2008; Other Information: DOI: 10.1063/1.2973495; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CORRECTIONS
GEV RANGE
MESON SPECTROSCOPY
OPERATOR PRODUCT EXPANSION
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
QUANTUM NUMBERS
QUARK-ANTIQUARK INTERACTIONS
QUARKS
REGGE TRAJECTORIES
RESONANCE PARTICLES
REST MASS
SCALAR MESONS
SUM RULES
SYMMETRY BREAKING