26-31 July 2021
Mexico City
Mexico/General timezone
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Contribution Invited plenary

Mexico City -
Invited Plenary

The Asymmetry in the antimatter of the proton


  • Dr. Paul E REIMER

Primary authors


Protons are understood as states of quarks and gluons bound by the strong force, but the dynamics that form a proton from quarks and gluons is poorly understood. Contrary to naive assumptions, there is an asymmetry between d and u anti-quarks. This asymmetry cannot arise from pQCD and demonstrates a fundamental anti-quark component in the proton. SeaQuest has measured the deuterium to hydrogen Drell-Yan cross section ratio and extracted anti-d/anti-u as a function of quark momentum fraction x.