Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-09-21
Phys.Rev.D75:012007,2007
Physics
High Energy Physics
High Energy Physics - Experiment
Scientific paper
10.1103/PhysRevD.75.012007
Precise measurements of the spin structure functions of the proton $g_1^p(x,Q^2)$ and deuteron $g_1^d(x,Q^2)$ are presented over the kinematic range $0.0041 \leq x \leq 0.9$ and $0.18 $ GeV$^2$ $\leq Q^2 \leq 20$ GeV$^2$. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The neutron spin structure function $g_1^n$ is extracted by combining proton and deuteron data. The integrals of $g_1^{p,d}$ at $Q^2=5$ GeV$^2$ are evaluated over the measured $x$ range. Neglecting any possible contribution to the $g_1^d$ integral from the region $x \leq 0.021$, a value of $0.330 \pm 0.011\mathrm{(theo.)}\pm0.025\mathrm{(exp.)}\pm 0.028$(evol.) is obtained for the flavor-singlet axial charge $a_0$ in a leading-twist NNLO analysis.
No associations
LandOfFree
Precise determination of the spin structure function $\mathbf{g_1}$ of the proton, deuteron and neutron does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Precise determination of the spin structure function $\mathbf{g_1}$ of the proton, deuteron and neutron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precise determination of the spin structure function $\mathbf{g_1}$ of the proton, deuteron and neutron will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-134962