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The Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-inelastic Scattering
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The flavor asymmetry of the light quark sea of the nucleon is determined in the kinematic range 0.02<x<0.3 and 1 GeV^2<Q^2<10 GeV^2, for the first time from semi-inclusive deep-inelastic scattering. The quantity (dbar(x)-ubar(x))/(u(x)-d(x)) is derived from a relationship between the yields of positive and negative pions from unpolarized hydrogen and deuterium targets. The flavor asymmetry dbar-ubar is found to be non-zero and x dependent, showing an excess of dbar over ubar quarks in the proton.
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Cited by 1 Pith paper
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Probing nonperturbative transverse momentum dependent PDFs with chiral perturbation theory: the $\bar{d}-\bar{u}$ asymmetry
Chiral perturbation theory predicts an exponentially suppressed dbar minus ubar asymmetry in the proton's TMD PDFs at large transverse separation.
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