The Strange Quark Contribution to the Proton's Magnetic Moment

Details The Strange Quark Contribution to the Proton's Magnetic Moment The Strange Quark Contribution to the Proton's Magnetic Moment

2003-12-15

arxiv.org/abs/nucl-ex/0312016v1

Phys.Lett.B583:79-86,2004

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 1 figure, submitted to Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.01.002

We report a new determination of the strange quark contribution to the proton's magnetic form factor at a four-momentum transfer Q2 = 0.1 (GeV/c)^2 from parity-violating e-p elastic scattering. The result uses a revised analysis of data from the SAMPLE experiment which was carried out at the MIT-Bates Laboratory. The data are combined with a calculation of the proton's axial form factor GAe to determine the strange form factor GMs(Q2=0.1)=0.37 +- 0.20 +- 0.26 +- 0.07. The extrapolation of GMs to its Q2=0 limit and comparison with calculations is also discussed.

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