Nucleon g2 Structure Function and Quark-Gluon Correlations

par Prof. Zein-Eddine Meziani (Temple University)

mardi 19 janv. 2010, 11:00 → 12:00 Europe/Paris

Salle de réunion LPC 1er étage

We discuss two recently carried out experiments at Jefferson Lab that measured with precision the spin structure function of the nucleon g2, aiming at the determination of the twist-3 matrix element known as d2 for both the proton and the neutron. This matrix element is related to the average Lorentz color force that a quark experiences just at the instant it is struck. It is also interpreted as a linear combination of the electric and magnetic "color polarizabilities" in the nucleon. Our goal is to improve the precision of the present data to provide a a more stringent test of the prediction of Lattice QCD for this interesting observable.