Delineating parton distributions and the strong coupling
Abstract
In this study, global fits for precision determinations of parton distributions, together with the highly correlated strong coupling αs, are presented up to next-to-next-to- leading order (NNLO) of QCD utilizing most world data (charm and jet production data are used where theoretically possible), except Tevatron gauge boson production data and LHC data which are left for genuine predictions. This is done within the 'dynamical' (valencelike input at Q02 = 0.8 GeV2 ) and 'standard' (input at Q02 = 2 GeV2) approach. The stability and reliability of the results are ensured by including nonperturbative higher-twist terms, nuclear corrections as well as target mass corrections, and by applying various (Q2, W2) cuts on available data. In addition, the Q02 dependence of the results is studied in detail. Predictions are given, in particular for LHC, on gauge and Higgs boson as well as for top-quark pair production. At NNLO the dynamical approach results in αs(MZ2) = 0.1136 ± 0.0004, whereas the somewhat less constrained standard fit gives αs(MZ2) = 0.1162 ± 0.0006.
- Authors:
-
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Technische Univ. Dortmund, Dortmund (Germany)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1133262
- Report Number(s):
- JLAB-THY-14-1853; DO-TH-14/03; DOE/OR/23177-3020; arXiv:1403.1852
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1600829
- Grant/Contract Number:
- AC05-06OR23177
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 7; 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
Citation Formats
Jimenez-Delgado, P., and Reya, E. Delineating parton distributions and the strong coupling. United States: N. p., 2014.
Web. doi:10.1103/PhysRevD.89.074049.
Jimenez-Delgado, P., & Reya, E. Delineating parton distributions and the strong coupling. United States. https://doi.org/10.1103/PhysRevD.89.074049
Jimenez-Delgado, P., and Reya, E. Tue .
"Delineating parton distributions and the strong coupling". United States. https://doi.org/10.1103/PhysRevD.89.074049. https://www.osti.gov/servlets/purl/1133262.
@article{osti_1133262,
title = {Delineating parton distributions and the strong coupling},
author = {Jimenez-Delgado, P. and Reya, E.},
abstractNote = {In this study, global fits for precision determinations of parton distributions, together with the highly correlated strong coupling αs, are presented up to next-to-next-to- leading order (NNLO) of QCD utilizing most world data (charm and jet production data are used where theoretically possible), except Tevatron gauge boson production data and LHC data which are left for genuine predictions. This is done within the 'dynamical' (valencelike input at Q02 = 0.8 GeV2 ) and 'standard' (input at Q02 = 2 GeV2) approach. The stability and reliability of the results are ensured by including nonperturbative higher-twist terms, nuclear corrections as well as target mass corrections, and by applying various (Q2, W2) cuts on available data. In addition, the Q02 dependence of the results is studied in detail. Predictions are given, in particular for LHC, on gauge and Higgs boson as well as for top-quark pair production. At NNLO the dynamical approach results in αs(MZ2) = 0.1136 ± 0.0004, whereas the somewhat less constrained standard fit gives αs(MZ2) = 0.1162 ± 0.0006.},
doi = {10.1103/PhysRevD.89.074049},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 7,
volume = 89,
place = {United States},
year = {Tue Apr 29 00:00:00 EDT 2014},
month = {Tue Apr 29 00:00:00 EDT 2014}
}
Web of Science
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