Springer LINK: The European Physical Journal A - Abstract Volume 3 Issue 1 (1998) pp 65-73

The European Physical Journal A

ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)

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Abstract Volume 3 Issue 1 (1998) pp 65-73

hadron physics: <Lambda>(1405) as a multiquark state

S. Choe (*)

Special Research Centre for the Subatomic Structure of Matter, University of Adelaide, Adelaide, SA 5005, Australia

Received: 11 November 1997 / Revised version: 28 April 1998

Abstract: In the QCD sum rule approach we predict the <Lambda> (1405) mass by choosing the <pi>⁰&Sgr;⁰ multiquark interpolating field. It is found that the mass is about 1.419 GeV from <Pi>₁ (q²) sum rule which is more reliable than <Pi>_q (q²) sum rule, where <Pi>_q (q²) and <Pi>₁ (q²) are two invariant functions of the correlator <Pi> (q²). We also present the sum rules for the K⁺p and the <pi>⁺&Sgr;⁺ multiquark states, and compare to those for the <pi>⁰&Sgr;⁰ multiquark state. The mass of the <Lambda> (1600) can be also reproduced in our approach.

PACS: 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes - 14.20.-c Baryons (including antiparticles) - 21.10.Dr Binding energies and masses

(*) E-mail: schoe@physics.adelaide.edu.au

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