Extraction of Spin-Averaged Light Quark Sea Asymmetry using SeaQuest Data
ORAL
Abstract
We present a new global QCD analysis of inclusive unpolarized data, using a Monte Carlo approach to extract the spin-averaged PDFs. We focus on the light quark sea asymmetry and include new Drell-Yan data from the SeaQuest experiment at Fermilab and $W$-lepton production data from the STAR collaboration at RHIC. We find that the SeaQuest experiment provides strong constraints on the asymmetry, and confirms that it must remain positive up to parton momentum fractions of $x=0.4$, as predicted by models in which the asymmetry arises from chiral symmetry breaking in QCD.
*This work was supported by the U.S. Department of Energy Contract No.~DE-AC05-06OR23177, under which Jefferson Science Associates, LLC operates Jefferson Lab, and the National Science Foundation under grant number PHY-1516088.The work of C.C. and A.M. was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, within the framework of the TMD Topical Collaboration, and by Temple University (C.C.).The work of N.S. was supported by the DOE, Office of Science, Office of Nuclear Physics in the Early Career Program.
–
Publication: Global QCD Extraction of Sea Asymmetry using SeaQuest and STAR data (planned paper)
Presenters
-
Christopher Cocuzza
- Temple University