THE “SPIN” STRUCTURE OF THE NUCLEON — A LATTICE INVESTIGATION

R. Altmeyer, G. Schierholz, M. Göckeler, R. Horsley and E. Laermann
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R. Altmeyer: DESY, Notkestraße 85, D-22603 Hamburg, Germany
G. Schierholz: DESY, Notkestraße 85, D-22603 Hamburg, Germany
M. Göckeler: HLRZ, c/o Forschungszentrum Jülich, D-52425 Jülich, Germany
R. Horsley: HLRZ, c/o Forschungszentrum Jülich, D-52425 Jülich, Germany
E. Laermann: Fakultät für Physik, Universität Bielefeld, D-33501 Bielefeld, Germany

International Journal of Modern Physics C (IJMPC), 1994, vol. 05, issue 02, 331-333

Abstract: We will discuss here an indirect lattice evaluation of the baryon axial singlet current matrix element. This quantity may be related to the fraction of nucleon spin carried by the quarks. The appropriate structure function has recently been measured (EMC experiment). As in this experiment, we find that the quarks do not appear to carry a large component of the nucleon spin.

Date: 1994
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DOI: 10.1142/S0129183194000428

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