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New Measurements of the Deuteron-to-Proton 𝐹2 Structure-Function Ratio

Journal Article · · Physical Review Letters
DOI:https://doi.org/10.1103/1xx8-rxlv· OSTI ID:3007002
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  1. Hampton University
  2. Stony Brook University
  3. Thomas Jefferson National Accelerator Facility
  4. Mississippi State University
  5. University of Tennessee
  6. Carnegie Mellon University
  7. University of Regina
  8. Kent State University; King Saud University
  9. Temple University
  10. The College of William & Mary; Mississippi State University
  11. Catholic University of America; Thomas Jefferson National Accelerator Facility
  12. The College of William & Mary
  13. Christopher Newport University
  14. Jazan University
  15. University of Virginia
  16. Hampton University; Thomas Jefferson National Accelerator Facility
  17. North Carolina A&T State University
  18. Ohio University
  19. University of Connecticut
  20. Old Dominion University; Thomas Jefferson National Accelerator Facility
  21. Catholic University of America
  22. Argonne National Laboratory
  23. Florida International University
  24. University of Colorado Boulder
  25. University of New Hampshire
  26. A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute)
  27. James Madison University
  28. Hampton University; Virginia Military Institute
  29. Thomas Jefferson National Accelerator Facility; Florida International University
  30. Rutgers University
  31. Florida International University; Catholic University of America
+ Show Author Affiliations
Nucleon structure functions, as measured in lepton-nucleon scattering, have historically provided a critical observable in the study of partonic dynamics within the nucleon. However, at very large parton momenta, it is both experimentally and theoretically challenging to extract parton distributions due to the probable onset of nonperturbative contributions and the unavailability of high-precision data at critical kinematics. Extraction of the neutron structure and the d quark distribution have been further challenging because of the necessity of applying nuclear corrections when utilizing scattering data from a deuteron target to extract the free neutron structure. However, a program of experiments has been carried out recently at the energy-upgraded Jefferson Lab electron accelerator aimed at significantly reducing the nuclear correction uncertainties on the d quark distribution function at large partonic momentum. This allows leveraging the vast body of deuterium data covering a large kinematic range to be utilized for d quark parton distribution function extraction. In this Letter, we present new data from experiment E12-10-002, carried out in Jefferson Lab Experimental Hall C, on the deuteron to proton cross section ratio at large Bjorken 𝑥. These results significantly improve the precision of existing data and provide a first look at the expected impact on quark distributions extracted from parton distribution function fits.
Research Organization:
Florida International Univ. (FIU), Miami, FL (United States); Florida International University, Miami, FL (United States); Hampton University, VA (United States); Mississippi State Univ., Mississippi State, MS (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
Hall C Collaboration
Grant/Contract Number:
AC02-05CH11231; AC05-06OR23177; FG02-07ER41528; SC0013615; SC0013620; SC0013941; SC0021200; SC0022007
Other Award/Contract Number:
PHY-1913257
PHY-1914034
PHY-2013002
OSTI ID:
3007002
Alternate ID(s):
OSTI ID: 2998351
OSTI ID: 3015453
OSTI ID: 3020724
OSTI ID: 3360575
OSTI ID: 3363307
Report Number(s):
DOE/OR/23177--7684; JLAB-PHY--24-4196
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 135; ISSN 1079-7114; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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