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Lattice QCD Evidence that the Lambda(1405) Resonance is an Antikaon-Nucleon Molecule

Hall, Jonathan M M; Kamleh, Waseem; Leinweber, Derek; Menadue, Benjamin; Owen, Benjamin; Thomas, Anthony; Young, Ross D


For almost 50 years the structure of the Λ(1405) resonance has been a mystery. Even though it contains a heavy strange quark and has odd parity, its mass is lower than any other excited spin-1/2 baryon. Dalitz and co-workers speculated that it might be a molecular state of an antikaon bound to a nucleon. However, a standard quark-model structure is also admissible. Although the intervening years have seen considerable effort, there has been no convincing resolution. Here we present a new...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.114.132002
Access Rights: Open Access


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