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The light-quark sector of the Lambda(1405) baryon is examined in the contextof the recent discovery of a dominant antikaon-nucleon composition at low quarkmasses. Further evidence for this interpretation of the Lambda(1405) ispresented, by calculating the u and d quark contributions to the Lambda(1405)magnetic form factors in lattice QCD. The extent to which these quantities areconsistent with the exotic molecular description can then be quantified bycomparing the results with the equivalent nucleon form factors. Drawing on arecent extension of the graded-symmetry approach for the flavor-singletcomponents of the Lambda(1405), the separation of the connected anddisconnected contributions is performed in both the flavor-octet and singletrepresentations. In both cases, the disconnected loop contributions are foundto be unexpectedly large. The relationship between the light-quarkcontributions to the Lambda(1405) magnetic form factor and the connectedcontributions of the nucleon magnetic form factors is thus confirmed in thecase of lattice QCD, establishing compelling evidence for a KN molecularstructure of the Lambda(1405) near the physical point.

The Light-Quark Magnetic Moment of the Lambda(1405) Antikaon-Nucleon Molecule