Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Next-to-next-to-leading order prediction for the photon-to-pion transition form factor (CROSBI ID 94835)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Melić, Blaženka ; Muller, D. ; Passek-Kumerički, Kornelija Next-to-next-to-leading order prediction for the photon-to-pion transition form factor // Physical review. D, Particles and fields, 68 (2003), 1; 014013, 36. doi: 10.1103/PhysRevD.68.014013

Podaci o odgovornosti

Melić, Blaženka ; Muller, D. ; Passek-Kumerički, Kornelija

engleski

Next-to-next-to-leading order prediction for the photon-to-pion transition form factor

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.

transition form factor ; conformal operator ; product expansion

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

68 (1)

2003.

014013

36

objavljeno

0556-2821

1089-4918

10.1103/PhysRevD.68.014013

Povezanost rada

Fizika

Poveznice
Indeksiranost