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Electromagnetic Form Factors for the $\Lambda$(1405)

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arxiv 1311.5026 v1 pith:LNXCC7Y4 submitted 2013-11-20 hep-lat

classification hep-lat
keywords lambdacalculationsfactorsformquarkapproachesavailablebehaviour
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Building on our successful technique to isolate the otherwise-elusive $\Lambda$(1405) using correlation matrix techniques and multiple source and sink smearings, we present calculations of the quark sector contributions to the electric form factors of the $\Lambda$(1405). Using the PACS-CS $(2+1)$-flavour full-QCD ensembles available through the ILDG, our calculations reveal behaviour consistent with the development of a non-trivial molecular $\overline{K}N$ bound-state component as one approaches the physical values of the $u$ and $d$ quark masses.

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  1. Physical interpretation of the 2s excitation of the nucleon

    hep-lat 2024-12 conditional novelty 5.0 of 10

    The 2s radial excitation of the nucleon is found to stay near 2 GeV when meson-baryon couplings are suppressed by quenching, supporting its association with the N(1710) and N(1880) resonances rather than the Roper.

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