Published April 2012
| Version v1
Journal article
Pion-Photon Transition Form Factor and Pion Distribution Amplitude in QCD: Facing the Enigmatic Behavior of the BaBar Data
- 1. Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum (Germany)
- 2. Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna (Russian Federation)
Description
We present an extended analysis of the data for the pion-photon transition form factor from different experiments, CELLO, CLEO, and BaBar, and discuss various theoretical approaches which try to reason from them. We focus on the divergent behavior of the BaBar data for the pion and those for the η(η′) pseudoscalar mesons and comment on recently proposed explanations for this discrepancy. We argue that it is not possible at present to accommodate these data within the standard QCD framework self-consistently.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.nuclphysbps.2012.02.031Additional details
Identifiers
- DOI
- 10.1016/j.nuclphysbps.2012.02.031;
- arXiv
- arXiv:1111.7137v2;
- PII
- S0920-5632(12)00048-5;
Publishing Information
- Journal Title
- Nuclear Physics. B, Proceedings Supplements
- Journal Volume
- 225-227
- Journal Page Range
- p. 146-150
- ISSN
- 0920-5632
- CODEN
- NPBSE7
Conference
- Title
- International workshop on e"+e"- collisions from #phi# to #psi#
- Acronym
- PHIPSI11
- Dates
- 19-22 Sep 2011
- Place
- Novosibirsk (Russian Federation)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43112627
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AMPLITUDES; CESR STORAGE RING; DISTRIBUTION; FORM FACTORS; LIGHT CONE; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PHOTONS; PIONS; QUANTUM CHROMODYNAMICS; SUM RULES
- Descriptors DEC
- BOSONS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; EQUATIONS; FIELD THEORIES; HADRONS; MASSLESS PARTICLES; MEASURING INSTRUMENTS; MESONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SPACE-TIME; SPECTROMETERS; STORAGE RINGS
Optional Information
- Copyright
- Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.