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Pregled bibliografske jedinice broj: 83223

Časopis

Autori: Kroll, Peter; Passek-Kumerički, Kornelija
Naslov: The two-gluon components of the eta and eta' mesons to leading-twist accuracy
Izvornik: Physical Review D (0556-2821) 67 (2003), 5; 054017-1-054017-20
Vrsta rada: članak
Ključne riječi: perturbative QCD; eta meson; eta' meson; two-gluon Fock state
Sažetak:
We critically reexamine the formalism for treating the leading-twist contributions from the two-gluon Fock components occurring in hard processes that involve eta and eta' mesons and establish a consistent set of conventions for the definition of the gluon distribution amplitudes, the anomalous dimensions as well as the projector of a two-gluon state onto an eta or eta' state. We calculate the eta, eta'--photon transition form factor to order alpha_s and show the cancellation of the collinear and UV singularities explicitly. An estimate of the lowest Gegenbauer coefficients of the gluon and quark distribution amplitudes is obtained from a fit to the eta, eta'--photon transition form factor data. In order to elucidate the role of the two-gluon Fock component further, we analyze electroproduction of eta, eta' mesons and the g*g* eta (eta') vertex.
Projekt / tema: 0098002
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
SCI-EXP, SSCI i/ili A&HCI
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://arxiv.org/abs/hep-ph/0210045
http://inspirehep.net/record/598694
Broj citata:
Altmetric:
DOI: 10.1103/PhysRevD.67.054017
URL cjelovitog teksta:
Google Scholar: The two-gluon components of the eta and eta' mesons to leading-twist accuracy
Napomene:
[arXiv:hep-ph/0210045]



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