QCD sum rule analysis of the pentaquark

6533b871fe1ef96bd12d2425

RESEARCH PRODUCT

QCD sum rule analysis of the pentaquark

Hee-jung Lee Hee-jung Lee Vicente Vento Nikolai Kochelev Nikolai Kochelev

subject

Quantum chromodynamics Physics Nuclear and High Energy Physics Instanton Particle physics High Energy Physics::Lattice High Energy Physics::Phenomenology Hyperon FOS: Physical sciences Física Parity (physics)Pentaquark High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph)Invariant mass Operator product expansion Sum rule in quantum mechanics

description

We perform a QCD sum rule calculation to determine the mass and the parity of the lowest lying pentaquark state. We include operators up to dimension $d=13$ in the OPE and the direct instanton contributions. We find evidence for a positive parity state. The contribution from operators of dimension $d>5$ is instrumental in determining the parity of the state and achieving the convergence of the sum rule.

year	journal	country	edition	language
2005-06-24

10.1103/physrevd.73.014010 http://hdl.handle.net/10550/43736

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