02.10.2013 Views

The Form Factors of the Nucleons: Present Status - Fisica

The Form Factors of the Nucleons: Present Status - Fisica

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Perturbative QCD (pQCD):<br />

Asymptotic Behavior?<br />

Q 2 F 2/F 1->1 for (very) large Q 2 (Brodsky and Farrar, 1975).<br />

Definitively not occurring yet for <strong>the</strong> proton, perhaps just starting<br />

for <strong>the</strong> neutron; what is <strong>the</strong> significance <strong>of</strong> different behavior for<br />

proton and neutron, beyond <strong>the</strong> consequence <strong>of</strong> neutrality, implying<br />

that F1n→0 for Q2 →0?<br />

proton neutron<br />

2/17/2013 C.F. Perdrisat SAEMP Trento 2013 21

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