Published September 1, 2007
| Version v1
Journal article
Do the QCD sum rules support four-quark states?
- 1. Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05389-970 Sao Paulo, Sao Paulo (Brazil)
- 2. Universidade Federal de Campina Grande, 58.109-900 Campina Grande, Paraiba (Brazil)
Description
We test the validity of the QCD sum rules applied to the light scalar mesons, the charmed mesons Ds0(2317) and Ds1(2460), and the X(3872) axial meson, considered as tetraquark states. We find that, with the studied currents, it is possible to find an acceptable Borel window only for the X(3872) meson. In such a Borel window we have simultaneously a good operator product expansion convergence and a pole contribution which is bigger than the continuum contribution. These results may indicate that light many-quark states cannot be considered as resonances separated from the continuum
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.76.056005;
- arXiv
- arXiv:0705.1357v2;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 76
- Journal Issue
- 5
- Journal Page Range
- p. 056005-056005.7
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39049636
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ALGEBRAIC CURRENTS; CHARMED MESONS; CONVERGENCE; OPERATOR PRODUCT EXPANSION; QUANTUM CHROMODYNAMICS; QUARKS; RESONANCE PARTICLES; SCALAR MESONS; SUM RULES
- Descriptors DEC
- BOSONS; CHARM PARTICLES; CURRENTS; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; FIELD THEORIES; HADRONS; MESONS; QUANTUM FIELD THEORY; SERIES EXPANSION
Optional Information
- Notes
- (c) 2007 The American Physical Society