Exotic Quark Structure of Lambda(1405) in QCD Sum Rule

Details Exotic Quark Structure of Lambda(1405) in QCD Sum Rule Exotic Quark Structure of Lambda(1405) in QCD Sum Rule

2008-05-13

arxiv.org/abs/0805.1816v1

Phys.Lett.B662:132-138,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14pages

Scientific paper

10.1016/j.physletb.2008.02.060

A new analysis is performed in QCD sum rule for the lightest negative parity baryon Lambda (1405). Mixings of three-quark and five-quark Fock components are taken into account. Terms containing up to dimension 12 condensates are computed in the operator product expansion. It is found that the sum rule gives much stronger coupling of Lambda* to the five-quark operator so that the five-quark components occupy about 90% of Lambda (1405).

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