Speaker
Christopher Cocuzza
(Temple University)
Description
We present the first global QCD analysis of helicity parton distribution functions (PDFs) to include the latest polarized $W$-lepton production data from the STAR collaboration at the Relativistic Heavy-Ion Collider. This data allows the first extraction of a nonzero helicity light quark sea asymmetry within a global QCD analysis. By performing a simultaneous extraction of the unpolarized and helicity PDFs, we are also able to extract for the first time in a self-consistent manner the polarizations of the light sea quarks $\Delta \bar{u}/\bar{u}$ and $\Delta \bar{d}/\bar{d}$.
Primary authors
Christopher Cocuzza
(Temple University)
Dr
Jake Ethier
(Nikhef)
W. Melnitchouk
(Jefferson Lab)
Dr
Andreas Metz
(Temple University)
N. Sato
(Jefferson Lab)
