A lattice study of the spin structure of the Lambda hyperon

Details A lattice study of the spin structure of the Lambda hyperon A lattice study of the spin structure of the Lambda hyperon

2002-08-13

arxiv.org/abs/hep-lat/0208017v1

Phys.Lett.B545:112-118,2002

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages, 2 figures

Scientific paper

10.1016/S0370-2693(02)02578-9

The internal spin structure of the Lambda is of special importance for the understanding of the spin structure of hadrons in general. The comparison between the nucleon and Lambda allows for a test of the relevant flavour-symmetry breaking effects. Using nonperturbatively O(a) improved Wilson fermions in the quenched approximation we have calculated the first moments of the unpolarised, longitudinally polarised and transversity quark distribution functions in the Lambda. The results indicate that flavour symmetry breaking has little effect on the internal spin structure, in accordance with model based expectations.

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