Measurement of the Antiquark Flavor Asymmetry in the Nucleon Sea

Details Measurement of the Antiquark Flavor Asymmetry in the Nucleon Sea Measurement of the Antiquark Flavor Asymmetry in the Nucleon Sea

2001-02-22

arxiv.org/abs/nucl-ex/0102012v1

Physics

Nuclear Physics

Nuclear Experiment

Ph.D. Dissertation, 127 pages, 34 figures

Scientific paper

A precise measurement of the ratio of Drell-Yan yields from an 800 GeV/c proton beam incident on liquid hydrogen and deuterium targets is reported. Over 370,000 Drell-Yan muon pairs were recorded. From these data, the ratio of anti-down ($\bar{d}$) to anti-up ($\bar{u}$) quark distributions in the proton sea is determined over a wide range in Bjorken-x. A strong x dependence is observed in the ratio $\bar{d}/\bar{u}$. From this result, the integral of $(\bar{d}-\bar{u})$ is evaluated for 0.015

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