Nexttonexttoleading order prediction for the photontopion transition form factor
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Relacija 
http://fulir.irb.hr/548/
http://link.aps.org/doi/10.1103/PhysRevD.68.014013 10.1103/PhysRevD.68.014013 

Naslov 
Nexttonexttoleading order prediction for the photontopion transition form factor


Autor 
Melić, Blaženka
Muller, D. PassekKumerički, Kornelija 

Tema 
Physics
Astronomy and Astrophysics 

Opis 
We evaluate the nexttonexttoleading order corrections to the hardscattering amplitude of the photontopion 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 socalled conformal scheme. The Wilson coefficients appearing in the nonforward kinematics are then entirely determined from those of the polarized deep inelastic scattering known to nexttonexttoleading 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 photontopion transition form factor can provide a fundamental testing ground for our QCD understanding of exclusive reactions.


Izdavač 
American Physical Society


Datum 
200307


Vrsta resursa 
Article
PeerReviewed 

Format (na primjer PDF) 
application/pdf


Jezik 
en
english 

Identifikator 
http://fulir.irb.hr/548/1/Nexttonextleading.pdf
Melić, Blaženka; Muller, D.; PassekKumerički, Kornelija (2003) Nexttonexttoleading order prediction for the photontopion transition form factor. Physical Review D, 68 (1). 014013101401336. ISSN 15507998 
