The spin structure of the Lambda hyperon in quenched lattice QCD
M. G\"ockeler, R. Horsley, D. Pleiter, P.E.L. Rakow, S. Schaefer, A., Sch\"afer, G. Schierholz
TL;DR
This paper investigates the spin structure of the Lambda hyperon using quenched lattice QCD, providing insights into quark contributions to its spin through nonperturbative calculations.
Contribution
It presents the first nonperturbative lattice QCD results for the Lambda hyperon's spin structure, focusing on quark contributions using improved Wilson fermions.
Findings
Quark contributions to Lambda spin quantified
Results support Lambda hyperon as a probe for nucleon spin structure
Method demonstrates effectiveness of quenched lattice QCD for baryon spin studies
Abstract
It has been suggested to use the production of Lambda hyperons for investigating the nucleon spin structure. The viability of this idea depends crucially on the spin structure of the Lambda. Using nonperturbatively O(a) improved Wilson fermions in the quenched approximation we have studied matrix elements of two-quark operators in the Lambda. We present results for the axial vector current, which give us the contributions of the u, d, and s quarks to the Lambda spin.
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