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Gluonic components of the pion and the transition form factor gammagamma -> pi(0)

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dc.contributor.author	Kochelev, Nikolai
dc.contributor.author	Vento Torres, Vicente
dc.date.accessioned	2015-05-13T08:25:15Z
dc.date.available	2015-05-13T08:25:15Z
dc.date.issued	2010
dc.identifier.citation	Kochelev, Nikolai Vento Torres, Vicente 2010 Gluonic components of the pion and the transition form factor gammagamma -> pi(0) Physical Review D 81 3 034009
dc.identifier.uri	http://hdl.handle.net/10550/43756
dc.description.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 γ∗γ∗→π0 using the instanton liquid model to describe the QCD 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.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2010, vol. 81, num. 3, p. 034009
dc.subject	Física
dc.title	Gluonic components of the pion and the transition form factor gammagamma -> pi(0)
dc.type	journal article	es_ES
dc.date.updated	2015-05-13T08:25:15Z
dc.identifier.doi	10.1103/PhysRevD.81.034009
dc.identifier.idgrec	063450
dc.rights.accessRights	open access	es_ES

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