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Determination of the ratior v =d v u v of the valence quark distributions in the proton from neutrino and antineutrino reactions on hydrogen and deuterium

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Zeitschrift für Physik C Particles and Fields

Abstract

Based on a QCD analysis of the parton momentum distributions in the proton, the ratior v =d v /u v of thed andu valence quark distributions is determined as function ofx in the range 0.01<x<0.7. The analysis uses data from neutrino and antineutrino charged current interactions on hydrogen and deuterium, obtained with BEBC in the (anti)neutrino wideband beam of the CERN SPS. Since v mainly depends on the deuterium/hydrogen ratios of the normalisedx-y-Q 2-distributions many systematic effects cancel. It is found thatr v decreases with increasingx, and drops below the naiveSU(6) expectation of 0.5 forx≳0.3. An extrapolation ofr v tox=1 is consistent with the hypothesisr v (1)=0.

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Jones, G.T., Jones, R.W.L., Kennedy, B.W. et al. Determination of the ratior v =d v u v of the valence quark distributions in the proton from neutrino and antineutrino reactions on hydrogen and deuterium. Z. Phys. C - Particles and Fields 62, 601–607 (1994). https://doi.org/10.1007/BF01574162

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  • DOI: https://doi.org/10.1007/BF01574162

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