Speaker
Christopher Cocuzza
(Temple University)
Description
We present a global QCD analysis of polarized parton distribution functions (PDFs) that includes the latest polarized $W$-lepton production data from the STAR collaboration at RHIC. These data allow the first data-driven extraction of a nonzero polarized light quark sea asymmetry within a global QCD analysis with minimal theoretical assumptions. We perform a simultaneous extraction of polarized PDFs, unpolarized PDFs, and pion and kaon fragmentation functions (FFs), through which we also extract self-consistently the polarizations of the light sea quarks $\Delta \bar{u}/\bar{u}$ and $\Delta \bar{d}/\bar{d}$.
| Submitted on behalf of a Collaboration? | No |
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Authors
Andreas Metz
(Temple University)
Christopher Cocuzza
(Temple University)
Wally Melnitchouk
(Jefferson Lab)
nobuo sato
(jlab)
