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Abstract:

We present a new analysis of the helicity parton distributions of the nucleon. The analysis takes into account the available data from inclusive and semi-inclusive polarized deep inelastic scattering, as well as from polarized proton-proton (p-p) scattering at RHIC. For the first time, all theoretical calculations are performed fully at next-to-leading order (NLO) of perturbative QCD, using a method that allows incorporation of the NLO corrections in a very fast and efficient way in the analysis. We find evidence for a rather small gluon polarization in the nucleon, over a limited region of momentum fraction, and for interesting flavor patterns in the polarized sea. © 2008 The American Physical Society.

Registro:

Documento: Artículo
Título:Global analysis of helicity parton densities and their uncertainties
Autor:De Florian, D.; Sassot, R.; Stratmann, M.; Vogelsang, W.
Filiación:Departamento de Fisica, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 1, (1428) Buenos Aires, Argentina
Radiation Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Physics Department, Brookhaven National Laboratory, Upton, NY 11973, United States
Palabras clave:Offshore oil well production; Protons; Deep-inelastic scattering; Global analysis; Gluon polarization; Helicity; Momentum fraction; Next-to-leading order; NLO corrections; Parton densities; Parton distributions; Perturbative QCD; Theoretical calculations; Uncertainty analysis
Año:2008
Volumen:101
Número:7
DOI: http://dx.doi.org/10.1103/PhysRevLett.101.072001
Título revista:Physical Review Letters
Título revista abreviado:Phys Rev Lett
ISSN:00319007
CODEN:PRLTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v101_n7_p_DeFlorian

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Citas:

---------- APA ----------
De Florian, D., Sassot, R., Stratmann, M. & Vogelsang, W. (2008) . Global analysis of helicity parton densities and their uncertainties. Physical Review Letters, 101(7).
http://dx.doi.org/10.1103/PhysRevLett.101.072001
---------- CHICAGO ----------
De Florian, D., Sassot, R., Stratmann, M., Vogelsang, W. "Global analysis of helicity parton densities and their uncertainties" . Physical Review Letters 101, no. 7 (2008).
http://dx.doi.org/10.1103/PhysRevLett.101.072001
---------- MLA ----------
De Florian, D., Sassot, R., Stratmann, M., Vogelsang, W. "Global analysis of helicity parton densities and their uncertainties" . Physical Review Letters, vol. 101, no. 7, 2008.
http://dx.doi.org/10.1103/PhysRevLett.101.072001
---------- VANCOUVER ----------
De Florian, D., Sassot, R., Stratmann, M., Vogelsang, W. Global analysis of helicity parton densities and their uncertainties. Phys Rev Lett. 2008;101(7).
http://dx.doi.org/10.1103/PhysRevLett.101.072001