The 24th International Spin Symposium

First Extraction of Polarized Sea Asymmetry from Weak Boson Production in Proton-Proton Collisions

22 Oct 2021, 07:30

20m

Room 501 (Kunibiki Messe)

Parallel Session Presentation Nucleon Helicity Structure Nucleon Helicity Structure

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 $\mathrm{\Delta }\overline{u}/\overline{u}$ and $\mathrm{\Delta }\overline{d}/\overline{d}$.

Presentation materials

SPIN2021.pdf