26-30 March 2012
University of Bonn
Europe/Berlin timezone

Precision Polarized SIDIS Experiments in Hall-A at 12 GeV JLab

27 Mar 2012, 17:20
Seminar room, Bethe Centre for Theoretical Physics (University of Bonn)

Seminar room, Bethe Centre for Theoretical Physics

University of Bonn

Future of DIS Future of DIS


Mr Kalyan Allada (Jefferson Lab)


One of the cleanest ways to access the Transverse Momentum Dependent (TMD) parton distribution functions of the nucleon is to measure single (SSA) and double spin asymmetries (DSA) in semi-inclusive DIS reactions using polarized nucleon targets. The Jefferson Lab 12 GeV upgrade will provide a unique opportunity to perform such precision measurements and to map these multi-dimensional PDFs. In this talk, we will present our plans for performing these precision measurements in Hall-A using Large acceptance SoLID spectrometer and polarized proton and 3 He (neutron) targets. In particular, we will focus on two approved A-rated experiments using both longitudinally and transversely polarized 3 He targets, and a conditionally approved experiment with a transversely polarized proton target. The high luminosities from these targets and the large acceptance of the SoLID spectrometer will allow for a precise 4-dimensional (x, Q2 , z, PT ) mapping of SSA and DSA. The full azimuthal angular coverage is necessary to untangle various angular moments and thereby reduce the systematic uncertainties. These experiments will provide the most precise data to extract transversity, Sivers and Worm-gear distributions of u and d-quarks and provide comprehensive information on the correlation between quark angular momentum and the nucleon’s spin.

Primary author

Mr Kalyan Allada (Jefferson Lab)

Presentation materials