Meson-Meson and Meson-Baryon Interactions in Lattice QCD

Journal Article · Tue Jul 11 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2220239· OSTI ID:20873279

Doi, Takumi ^[1]; Takahashi, Toru T ^[2]; Suganuma, Hideo ^[3]

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1. RIKEN-BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
3. Department of Physics, Kyoto University, Kitashirakawaoiwake, Kyoto 606-8502 (Japan)

We study the meson-meson and meson-baryon interactions in lattice QCD. The simulation is performed on 203 x 24 lattice at {beta} = 5 7 using Wilson gauge action and Wilson fermion at the quenched level. By adopting one static quark for each hadron as 'heavy-light meson' and 'heavy-light-light baryon', we define the distance r of two hadrons and extract the inter-hadron potential from the energy difference of the two-particle state and its asymptotic state. We find that both of the meson-meson and meson-baryon potentials are nontrivially weak for the whole range of 0 2fm {approx} r {approx} 0 8fm. The effect of including/excluding the quark-exchange diagrams is found to be marginal.

• OSTI ID: 20873279
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 842; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPUTERIZED SIMULATION
FEYNMAN DIAGRAM
LATTICE FIELD THEORY
MESON-BARYON INTERACTIONS
MESON-MESON INTERACTIONS
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARKS