DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: On the shape of the d ¯ u ¯ 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:
; ; ORCiD logo; ; ; ;
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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.physletb.2019.135143

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Dynamical Symmetry Breaking in the Sea of the Nucleon
journal, October 2000


Progress in the Determination of the Partonic Structure of the Proton
journal, October 2013


New parton distribution functions from a global analysis of quantum chromodynamics
journal, February 2016


structure function ratio at large x
journal, June 1996


Constraints on large- x parton distributions from new weak boson production and deep-inelastic scattering data
journal, June 2016


Gottfried sum from the ratio F 2 n / F 2 p
journal, May 1991


Pion cloud of the nucleon and its effect on deep-inelastic structure
journal, May 1992


Massive Lepton-Pair Production in Hadron-Hadron Collisions at High Energies
journal, August 1970


Constraints on isospin breaking in the light quark sea from the Drell-Yan process
journal, March 1991


Relativistic deuteron structure function
journal, August 1994


Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process
journal, July 1994


Global parton distributions with nuclear and finite- Q 2 corrections
journal, May 2013


Flavor asymmetry of light quarks in the nucleon sea
journal, January 2001


Longitudinal-Transverse Separations of Deep-Inelastic Structure Functions at Low Q 2 for Hydrogen and Deuterium
journal, April 2007


New method for extracting neutron structure functions from nuclear data
journal, March 2009


d ¯ u ¯ Asymmetry in the Proton in Chiral Effective Theory
journal, March 2015


Nuclear effects in the proton-deuteron Drell-Yan process
journal, July 2014


Quark elastic scattering as a source of high-transverse-momentum mesons
journal, May 1977


Parton momentum and helicity distributions in the nucleon
journal, August 2013

  • Jimenez-Delgado, P.; Melnitchouk, W.; Owens, J. F.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 40, Issue 9
  • DOI: 10.1088/0954-3899/40/9/093102

Measurement of the deuteron structure function F 2 in the resonance region and evaluation of its moments
journal, April 2006


Measurement of the proton and deuteron structure functions, F2p and F2d, and of the ratio
journal, January 1997


Parton distributions from nonlocal chiral SU(3) effective theory: Splitting functions
journal, January 2019


On the momentum dependence of the flavor structure of the nucleon sea
journal, September 2014


Parton distributions from high-precision collider data: NNPDF Collaboration
journal, October 2017


Measurements of the separated longitudinal structure function F L from hydrogen and deuterium targets at low Q 2
journal, April 2018


Improved measurement of the d ¯ / ū asymmetry in the nucleon sea
journal, August 2001


Flavor asymmetry of polarized antiquark distributions and semi-inclusive DIS
journal, May 2000

  • Dressler, B.; Goeke, K.; Polyakov, M. V.
  • The European Physical Journal C, Vol. 14, Issue 1
  • DOI: 10.1007/s100520000329

A statistical approach for polarized parton distributions
journal, April 2002

  • Bourrely, C.; Soffer, J.; Buccella, F.
  • The European Physical Journal C, Vol. 23, Issue 3
  • DOI: 10.1007/s100520100855

Parton distributions in the LHC era: MMHT 2014 PDFs
journal, May 2015


Evidence for Valencelike Quark-Hadron Duality
journal, August 2000


Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-Inelastic Scattering
journal, December 1998


Experimental Verification of Quark-Hadron Duality
journal, August 2000


Global study of nuclear structure functions
journal, January 2006


What does kinematical target mass sensitivity in DIS reveal about hadron structure?
journal, May 2019


A limit on the pionic component of the nucleon through SU(3) flavour breaking in the sea
journal, June 1983


Applications of quark-hadron duality in the F 2 structure function
journal, September 2009


Reevaluation of the Gottfried sum
journal, July 1994


Flavor structure of the nucleon sea
journal, November 2014


Flavour symmetry breaking in antiquark distributions
journal, March 1979


A critical appraisal and evaluation of modern PDFs
journal, August 2016


Deep-inelastic scattering from off-shell nucleons
journal, February 1994


Fixed target Drell-Yan data and NNLO QCD fits of parton distribution functions
journal, September 2006


Dynamics of light antiquarks in the proton
journal, December 1998


Sum Rule for High-Energy Electron-Proton Scattering
journal, June 1967


Quark sea and quantum chromodynamics
journal, June 1977


Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea
journal, April 1998


Flavor asymmetry of antiquark distributions in the nucleon
journal, September 1998


Order αs2 perturbative QCD corrections to the Gottfried sum rule
journal, July 2003


Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions
journal, February 2000

  • Lai, H. L.; Huston, J.; Kuhlmann, S.
  • The European Physical Journal C, Vol. 12, Issue 3
  • DOI: 10.1007/s100529900196

Target mass corrections
journal, March 2008

  • Schienbein, Ingo; Radescu, Voica A.; Zeller, G. P.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 35, Issue 5
  • DOI: 10.1088/0954-3899/35/5/053101

Parton distributions: a new global analysis
journal, July 1998

  • Martin, A. D.; Roberts, R. G.; Stirling, W. J.
  • The European Physical Journal C, Vol. 4, Issue 3
  • DOI: 10.1007/s100529800904

Accurate measurement of F2d/F2p and Rd − Rp
journal, March 1997


Flavor asymmetry of the nucleon sea
journal, February 1997


A high statistics measurement of the proton structure functions F2(x, Q2) and R from deep inelastic muon scattering at high Q2
journal, June 1989


Precision measurement of $R= \sigma_L/\sigma_T$ on hydrogen, deuterium, and beryllium targets in deep inelastic electron scattering
journal, April 1996

  • Tao et al., L. H.
  • Zeitschrift f�r Physik C Particles and Fields, Vol. 70, Issue 3
  • DOI: 10.1007/s002880050117