Publications
Publication Information
| Title | On the shape of the $\bar d-\bar u$ asymmetry | ||
| Authors | Alberto Accardi, Cynthia Keppel, Shujie Li, Wolodymyr Melnitchouk, Joseph Owens | ||
| JLAB number | JLAB-THY-19-3053 | ||
| LANL number | arXiv:1910.02931 | ||
| Other number | DOE/OR/23177-4777 | ||
| Document Type(s) | (Journal Article) | ||
| Associated with EIC: | No | ||
| Supported by Jefferson Lab LDRD Funding: | No | ||
| Funding Source: | Nuclear Physics (NP) | ||
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Journal Compiled for Physics Letters B Volume 801 Page(s) 135143 Refereed | |||
| Publication Abstract: | Using data from a recent reanalysis of neutron structure functions extracted from inclusive proton and deuteron deep-inelastic scattering (DIS), we re-examine the constraints on the shape of the $\bar d-\bar u$ asymmetry in the proton at large parton momentum fractions $x$. A global analysis of the proton--neutron structure function difference from BCDMS, NMC, SLAC and Jefferson Lab, and Fermilab Drell-Yan lepton-pair production cross sections, suggests that existing data can be well described with $\bar d > \bar u$ for all values of $x$ currently accessible. We compare the shape of the fitted $\bar d-\bar u$ distributions with expectations from nonperturbative models based on chiral symmetry breaking, which can be tested by upcoming Drell-Yan data from the SeaQuest experiment at larger values of $x$. | ||
| Experiment Numbers: | other | ||
| Group: | THEORY CENTER | ||
| Document: | |||
| DOI: | https://doi.org/10.1016/j.physletb.2019.135143 | ||
| Accepted Manuscript: | 1-s2.0-S0370269319308652-main.pdf | ||
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