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Abstract:

The perturbative evolution in QCD at three loops generates a stragne-antistrang asymmetry in the nucleons was analyzed. It was found that non-singlet evolution of the parton densities at three loops generates a strange asymmetry even if it was not present at the input scale. It was also observed that the effect arises because at that order of perturbation theory the probability of splitting q → q-1 and became different from that of q → q-1 and because the nucleon has u and d valence densities. The results show that the asymmetries were smaller than in the strange sector, mostly due to the larger initial scale.

Registro:

Documento: Artículo
Título:Perturbative generation of a strange-quark asymmetry in the nucleon
Autor:Catani, S.; De Florian, D.; Rodrigo, G.; Vogelsang, W.
Filiación:INFN, Sezione di Firenze, Università di Firenze, I-50019 Sesto Fiorentino, Florence, Italy
Departamento de Física, FCEYN, Universidad de Buenos Aires, Buenos Aires, Argentina
Inst. de Física Corpuscular, Apartado de Correos 22085, E-46071 Valencia, Spain
Physics Department, RIKEN-BNL Research Center, Brookhaven National Laboratory, Upton, NY 11973, United States
Palabras clave:Green's function; Integral equations; Interpolation; Mathematical models; Parameter estimation; Quantum theory; Wave propagation; Nucleon structures; Nucleons; Perturbative generation; Quarks; High energy physics
Año:2004
Volumen:93
Número:15
Página de inicio:152003
Página de fin:1-152003-4
DOI: http://dx.doi.org/10.1103/PhysRevLett.93.152003
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_v93_n15_p152003_Catani

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Citas:

---------- APA ----------
Catani, S., De Florian, D., Rodrigo, G. & Vogelsang, W. (2004) . Perturbative generation of a strange-quark asymmetry in the nucleon. Physical Review Letters, 93(15), 152003-1-152003-4.
http://dx.doi.org/10.1103/PhysRevLett.93.152003
---------- CHICAGO ----------
Catani, S., De Florian, D., Rodrigo, G., Vogelsang, W. "Perturbative generation of a strange-quark asymmetry in the nucleon" . Physical Review Letters 93, no. 15 (2004) : 152003-1-152003-4.
http://dx.doi.org/10.1103/PhysRevLett.93.152003
---------- MLA ----------
Catani, S., De Florian, D., Rodrigo, G., Vogelsang, W. "Perturbative generation of a strange-quark asymmetry in the nucleon" . Physical Review Letters, vol. 93, no. 15, 2004, pp. 152003-1-152003-4.
http://dx.doi.org/10.1103/PhysRevLett.93.152003
---------- VANCOUVER ----------
Catani, S., De Florian, D., Rodrigo, G., Vogelsang, W. Perturbative generation of a strange-quark asymmetry in the nucleon. Phys Rev Lett. 2004;93(15):152003-1-152003-4.
http://dx.doi.org/10.1103/PhysRevLett.93.152003