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The Λ(1405) in full QCD

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Date

2011

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Abstract

At 1405.1 MeV, the lowest-lying negative-parity state of the Λ baryon lies surprising low. Indeed, this is lower than the lowest negative-parity state of the nucleon, even though the Λ(1405) possesses a valence strange quark. However, previous Lattice QCD studies have been unable to identify such a low-lying state. Using the PACS-CS (2+1)-flavour full-QCD ensembles, available through the ILDG, we utilise a variational analysis with source and sink smearing to isolate this elusive state. We find three low-lying odd-parity states, and for the first time reproduce the correct level ordering with respect to the nearby scattering thresholds.

Description

Keywords

Λ(1405), baryon resonances, Lambda, Lattice QCD, negative-parity

Citation

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https://dspace-test.anu.edu.au/handle/1885/733737932

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DevOps Pure Testing

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Conference contribution

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DOI

10.1063/1.3667313

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