Strange magnetic form factor of the proton at $Q^2 = 0.23$ GeV$^2$

Details Strange magnetic form factor of the proton at $Q^2 = 0.23$ GeV$^2$ Strange magnetic form factor of the proton at $Q^2 = 0.23$ GeV$^2$

2008-07-07

arxiv.org/abs/0807.0944v3

Phys.Rev.C79:065202,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 4 figures

Scientific paper

10.1103/PhysRevC.79.065202

We determine the $u$ and $d$ quark contributions to the proton magnetic form factor at finite momentum transfer by applying chiral corrections to quenched lattice data. Heavy baryon chiral perturbation theory is applied at next to leading order in the quenched, and full QCD cases for the valence sector using finite range regularization. Under the assumption of charge symmetry these values can be combined with the experimental values of the proton and neutron magnetic form factors to deduce a relatively accurate value for the strange magnetic form factor at $Q^2=0.23$ GeV$^2$, namely $G_M^s=-0.034 \pm 0.021$ $\mu_N$.

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