Study of semi-inclusive deep inelastic (e, e'π^±) production with a polarized³He target

The 12 GeV upgrade at Jefferson Lab will open a new era of precision measurement of the Transverse Momentum Dependent parton distribution functions (TMDs) through the Semi-Inclusive Deep-Inelastic Scattering (SIDIS). In this talk, we discussed the projected results on measurements of TMDs using a newly proposed large acceptance solenoid detector together with the standard Hall A polarized3He target. The high luminosity and the large acceptance detector will allow for a precise 3-D (x, z and PT) mapping of azimuthal asymmetries. Furthermore, the full 2π azimuthal angular coverage for the solenoid detector is essential to control the relevant systematic uncertainties in extracting the azimuthal asymmetries. With a 40 cm long transversely polarized3He target, a total of 60 days of beam time at a beam current of 15 μA, we can determine tensor charge of d quark to 10% in a model independent way. The extracted Sivers asymmetry will provide important information to understand the correlation between the quark orbital angular momentum and the nucleon spin.

Duke Scholars

Author Haiyan Gao Physics