PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T06 QCD and Hadronic Physics
Impact of SeaQuest data on sea-quark PDFs at large x
M.V. Garzelli*, S. Alekhin, M.V. Garzelli, S. Kulagin and S.O. Moch
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Pre-published on: February 23, 2024
Published on: March 21, 2024
We investigate the impact of the recently released FNAL-E906 (SeaQuest) data on the ratio of proton-deuteron and proton-proton Drell-Yan production cross-sections on the sea quark PDFs. We find that they have constraining power on the light-quark sea isospin asymmetry $(\bar{d}-\bar{u})(x)$ and on the $(\bar{d}/\bar{u})(x)$ ratio at large longitudinal momentum fraction $x$ values,
and that their constraints turn out to be compatible with those from Drell-Yan data in collider experiments (Tevatron and Large Hadron Collider) and in old fixed-target experiments by the FNAL-E605 and FNAL-E866 collaborations. We study the impact of nuclear corrections due to the deuteron target, finding them within 1% in most of the kinematic region covered by SeaQuest. We perform a new proton PDF fit, including SeaQuest data, using the ABMP16 methodology and we compare it to the ABMP16 baseline.
DOI: https://doi.org/10.22323/1.449.0279
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