On the shape of the asymmetry
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.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Org.:
- CTEQ-Jefferson Lab (CJ) Collaboration
- OSTI Identifier:
- 1577928
- Alternate Identifier(s):
- OSTI ID: 1581145
- Report Number(s):
- JLAB-THY-19-3053; DOE/OR/23177-4777; arXiv:1910.02931
Journal ID: ISSN 0370-2693; S0370269319308652; 135143; PII: S0370269319308652
- Grant/Contract Number:
- AC05-06OR23177; SC0008791; PHY-1913257
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 801 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Accardi, A., Keppel, C. E., Li, S., Melnitchouk, W., Niculescu, G., Niculescu, I., and Owens, J. F. On the shape of the d ¯ − u ¯ asymmetry. Netherlands: N. p., 2020.
Web. doi:10.1016/j.physletb.2019.135143.
Accardi, A., Keppel, C. E., Li, S., Melnitchouk, W., Niculescu, G., Niculescu, I., & Owens, J. F. On the shape of the d ¯ − u ¯ asymmetry. Netherlands. https://doi.org/10.1016/j.physletb.2019.135143
Accardi, A., Keppel, C. E., Li, S., Melnitchouk, W., Niculescu, G., Niculescu, I., and Owens, J. F. Sat .
"On the shape of the d ¯ − u ¯ asymmetry". Netherlands. https://doi.org/10.1016/j.physletb.2019.135143.
@article{osti_1577928,
title = {On the shape of the d ¯ − u ¯ asymmetry},
author = {Accardi, A. and Keppel, C. E. and Li, S. and Melnitchouk, W. and Niculescu, G. and Niculescu, I. and Owens, J. F.},
abstractNote = {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.},
doi = {10.1016/j.physletb.2019.135143},
journal = {Physics Letters B},
number = C,
volume = 801,
place = {Netherlands},
year = {Sat Feb 01 00:00:00 EST 2020},
month = {Sat Feb 01 00:00:00 EST 2020}
}
https://doi.org/10.1016/j.physletb.2019.135143
Web of Science
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