hrvatski jezikClear Cookie - decide language by browser settings

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

Melić, Blaženka; Muller, D.; Passek-Kumerički, Kornelija (2003) Next-to-next-to-leading order prediction for the photon-to-pion transition form factor. Physical Review D, 68 (1). 014013-1-014013-36. ISSN 1550-7998

PDF - Published Version - article
Download (477kB) | Preview


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 nonforward kinematics are then entirely determined from those of the polarized deep inelastic scattering known to next-to-next-to-leading order 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.

Item Type: Article
Uncontrolled Keywords: virtual compton-scattering; deep-inelastic-scattering; qcd sum-rules; perturbative quantum chromodynamics; exclusive processes; light-cone; distribution amplitude; anomalous dimensions; conformal-invariance; evolution kernels
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Astronomy and Astrophysics
Divisions: Theoretical Physics Division
Project titleProject leaderProject codeProject type
Temeljne interakcije u fizici elementarnih čestica i kozmologijiBranko Guberina0098002MZOS
Depositing User: Blaženka Melić
Date Deposited: 29 May 2013 15:09
DOI: 10.1103/PhysRevD.68.014013

Actions (login required)

View Item View Item


Downloads per month over past year

Increase Font
Decrease Font
Dyslexic Font