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Pregled bibliografske jedinice broj: 83375

Časopis

Autori: Melić, Blaženka; Muller, D.; Passek-Kumerički, Kornelija
Naslov: Next-to-next-to-leading order prediction for the photon-to-pion transition form factor
Izvornik: Physical Review D (0556-2821) 68 (2003), 1; 014013-1-014013-36
Vrsta rada: članak
Ključne riječi: transition form factor; conformal operator product expansion
Sažetak:
We evaluate the next-to-next-to-leading order corrections to the hard-scattering amplitude of the photon-to-pion transition form factor. Our approach is based on the predictive power of the conformal operator product expansion, which is valid for a vanishing $\beta$-function in the so- called conformal scheme. The Wilson--coefficients appearing in the non-forward kinematics are then entirely determined from those of the polarized deep-inelastic scattering known to next-to-next- to-leading accuracy. We propose different schemes to include explicitly also the conformal symmetry breaking term proportional to the $\beta$- function, and discuss numerical predictions calculated in different kinematical regions. It is demonstrated that the photon-to-pion transition form factor can provide a fundamental testing ground for our QCD understanding of exclusive reactions.
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://fulir.irb.hr/548/1/Next-to-next-leading.pdf
http://inspirehep.net/record/605446
Broj citata:
Altmetric:
DOI: 10.1103/PhysRevD.68.014013
URL cjelovitog teksta:
Google Scholar: Next-to-next-to-leading order prediction for the photon-to-pion transition form factor
Napomene:
[arXiv:hep-ph/0212346]



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