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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Photon-Pion Transition Form Factor: Incompatible Data or Incompatible Models?

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Author(s):
de Melo, J. P. B. C. [1] ; El-Bennich, Bruno [1] ; Frederico, Tobias [2]
Total Authors: 3
Affiliation:
[1] Univ Cruzeiro Sul, Lab Fis Teor & Computac, BR-01506000 Sao Paulo - Brazil
[2] Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos - Brazil
Total Affiliations: 2
Document type: Journal article
Source: FEW-BODY SYSTEMS; v. 55, n. 5-7, p. 373-379, JUN 2014.
Web of Science Citations: 8
Abstract

The elastic and gamma -> pi transition form factors of the pion along with its usual static observables are calculated within a light-front field approach to the constituent quark model. The focus of this exercise in a simple model is on a unified description of all observables with one singly parametrized light-front wave function to detect possible discrepancies in experimental data, in particular the contentious large momentum-squared data on the transition factor as reported by BaBar and Belle. We also discuss the relation of a small to vanishing pion charge radius with an almost constant pion distribution amplitude and compare our results with those obtained in a holographic light-front model. (AU)

FAPESP's process: 09/51296-1 - Hadronic effects in heavy-quark physics
Grantee:Bruno Omar El-Bennich
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 12/17396-1 - Elementary particle physics and nucleus
Grantee:Joao Pacheco Bicudo Cabral de Mello
Support type: Regular Research Grants
FAPESP's process: 09/00069-5 - Few-body aspects of many-body physics
Grantee:Tobias Frederico
Support type: Research Projects - Thematic Grants