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Author
Kochelev, N.I.
;
Vento, V.
Title
Gluonic components of the pion and the transition form factor gamma*gamma* -> pi(0)
Type
Journal Article
Year
2010
Publication
Physical Review D
Abbreviated Journal
Phys. Rev. D
Volume
81
Issue
3
Pages
034009 - 5pp
Keywords
Abstract
We propose an effective Lagrangian for the coupling of the neutral pion with gluons whose strength is determined by a low-energy theorem. We calculate the contribution of the gluonic components arising from this interaction to the pion transition form factor gamma*gamma* -> pi(0) using the instanton liquid model to describe the quantum chromodynamics vacuum. We find that this contribution is large and might explain the anomalous behavior of the form factor at large virtuality of one of the photons, a feature which was recently discovered by the BABAR Collaboration.
Address
[Kochelev, N. I.] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, Russia, Email: kochelev@theor.jinr.ru
Corporate Author
Thesis
Publisher
Amer Physical Soc
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1550-7998
ISBN
Medium
Area
Expedition
Conference
Notes
ISI:000275069000030
Approved
no
Is ISI
yes
International Collaboration
yes
Call Number
IFIC @ elepoucu @
Serial
495
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