An Alternative Method to Obtain the Quark Polarization of the Nucleon

Details An Alternative Method to Obtain the Quark Polarization of the Nucleon An Alternative Method to Obtain the Quark Polarization of the Nucleon

2000-12-11

arxiv.org/abs/hep-ph/0012121v1

Phys.Rev. D63 (2001) 057501

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure

Scientific paper

10.1103/PhysRevD.63.057501

An alternate method is described to extract the quark contribution to the spin of the nucleon directly from the first moment of the deuteron structure function, $g^d_1$. It is obtained without recourse to the use of input on the nucleon wave function from hyperon decays involving the flavor symmetry parameters, F and D. The result for the quark polarization of the nucleon, $\Delta\Sigma_ N,$ is in good agreement with the values of the singlet axial current matrix element, $a_0$, obtained from recent next-to-leading order analyses of current proton, neutron and deuteron data.

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