New parton distributions from large-x and low-Q2 data
Abstract
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:
-
- Hampton Univ., Hampton, VA (United States)
- Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Florida State Univ., Tallahassee, FL (United States)
- 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)
- 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
- Resource 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; D QUARKS; DEUTERIUM; DISTRIBUTION; DISTRIBUTION FUNCTIONS; TARGETS
Citation Formats
Alberto Accardi, Christy, M. Eric, Keppel, Cynthia E., Melnitchouk, Wally, Monaghan, Peter A., Morfin, Jorge G., and Owens, Joseph F. New parton distributions from large-x and low-Q2 data. United States: N. p., 2010.
Web. doi:10.1103/PhysRevD.81.034016.
Alberto Accardi, Christy, M. Eric, Keppel, Cynthia E., Melnitchouk, Wally, Monaghan, Peter A., Morfin, Jorge G., & Owens, Joseph F. New parton distributions from large-x and low-Q2 data. United States. https://doi.org/10.1103/PhysRevD.81.034016
Alberto Accardi, Christy, M. Eric, Keppel, Cynthia E., Melnitchouk, Wally, Monaghan, Peter A., Morfin, Jorge G., and Owens, Joseph F. Thu .
"New parton distributions from large-x and low-Q2 data". United States. https://doi.org/10.1103/PhysRevD.81.034016. https://www.osti.gov/servlets/purl/983651.
@article{osti_983651,
title = {New parton distributions from large-x and low-Q2 data},
author = {Alberto Accardi and Christy, M. Eric and Keppel, Cynthia E. and Melnitchouk, Wally and Monaghan, Peter A. and Morfin, Jorge G. and Owens, Joseph F.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.81.034016},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = ,
volume = 81,
place = {United States},
year = {Thu Feb 11 00:00:00 EST 2010},
month = {Thu Feb 11 00:00:00 EST 2010}
}
Web of Science
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