Speaker
Christopher Cocuzza
(Temple University)
Description
We present the latest global QCD analysis results from the Jefferson Lab Angular Momentum (JAM) collaboration on helicity PDFs. We focus on the light quark sea asymmetry, including in the analysis the latest $W$-lepton production data from the STAR collaboration at RHIC, as well as the sign of the gluon's helicity, including the latest jet production data from RHIC. We find a nonzero sea asymmetry and that current experimental data is not able to determine the sign of the gluon's helicity without constraints from theory.
Primary authors
Andreas Metz
(Physics Department, Temple University, Philadelphia)
Christopher Cocuzza
(Temple University)
Nobuo Sato
(Jefferson Lab)
Wally Melnitchouk
(Jefferson Lab)
Yiyu Zhou
