The antiquark flavor asymmetry dbar/ubar in the proton gives an insight on the non-perturbative structure of the proton. The SeaQuest experiment measured the Drell–Yan cross section ratio of proton-deuterium to proton-proton to determine the antiquark flavor asymmetry dbar/ubar precisely in the range of 0.13<x<0.45. SeaQuest provides the evidence of dbar/ubar > 1.0 over a wide range of momenta. Some theoretical models reproduce this result.
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- 日本学術振興会 / Japan Society for the Promotion of Science [JSPS]
- Ministry of Science and Technology, Taiwan (through Organization: Ministry of Science and Technology [MOST])
- National Science Foundation [NSF]
- United States Department of Energy [DOE]