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Title: New parton distributions from large-x and low-Q2 data

We report results of a new global next-to-leading order fit of parton distribution functions in which cuts on W and Q are relaxed, thereby including more data at high values of x. Effects of target mass corrections (TMCs), higher twist contributions, and nuclear corrections for deuterium data are significant in the large-x region. The leading twist parton distributions are found to be stable to TMC model variations as long as higher twist contributions are also included. Furthermore, the behavior of the d quark as x → 1 is particularly sensitive to the deuterium corrections, and using realistic nuclear smearing models the d-quark distribution at large x is found to be softer than in previous fits performed with more restrictive cuts.
Authors:
;  [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5]
  1. Hampton Univ., Hampton, VA (United States)
  2. Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  5. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
OSTI Identifier:
983651
Report Number(s):
JLAB-THY--09-1105; DOE/OR/23177--1052
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1004595
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 81; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; D QUARKS; DEUTERIUM; DISTRIBUTION; DISTRIBUTION FUNCTIONS; TARGETS