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Paper detail

Isolating the Λ(1405) in Lattice QCD

The negative-parity ground state of the Λ baryon lies surprisingly low in mass. At 1405.1 MeV, it lies lower than the negative-parity ground state nucleon, even though it has a valence strange quark. Using the PACS-CS (2+1)-flavour full-QCD ensembles available through the ILDG, we employ a variational analysis using 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.

preprint2011arXivOpen access
Benjamin J. MenadueWaseem KamlehDerek B. LeinweberM. Selim Mahbub
hep-lat
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Benjamin J. MenadueWaseem KamlehDerek B. LeinweberM. Selim Mahbub

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