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arxiv: 0811.0807 · v2 · submitted 2008-11-05 · ✦ hep-lat

Hunting for the strangeness content of the nucleon

classification ✦ hep-lat
keywords nucleondeltastrangenesstimeableall-to-allapproachcalculation
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We present results for the strangeness contribution to the nucleon, <N|ss|N>, and to the spin of the nucleon, Delta s. By combining several variance reduction techniques for all-to-all propagators we are able to obtain gains in terms of computer time of factors of 25-30 for the disconnected loop that is needed within the calculation of Delta s, relative to the standard approach of just employing time partitioning/dilution. For <N|ss|n>, the error is dominated by the gauge noise.

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