The STAR W+/W- cross section ratio is minimally affected by fiducial constraints and pT resummation, providing robust discrimination between ar d(x) and ar u(x) PDF models at x ~ 0.1 via L2 sensitivity and reweighting.
NNLO constraints on proton PDFs from the SeaQuest and STAR experiments and other developments in the CTEQ-TEA global analysis,
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Probing SU(2) Quark Flavor Asymmetry with W Bosons at RHIC
The STAR W+/W- cross section ratio is minimally affected by fiducial constraints and pT resummation, providing robust discrimination between ar d(x) and ar u(x) PDF models at x ~ 0.1 via L2 sensitivity and reweighting.