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Title: Pion-photon transition form factor in light-cone sum rules

Abstract

We extract constraints on the pion distribution amplitude from available data on the pionphoton transition form factor in the framework of light-cone sum rules. A pronounced discrepancy (2.7 - 3){sigma} between the Gegenbauer expansion coefficients extracted from the CELLO, CLEO, and Belle experimental data relative to those from BaBar is found. Predictions for the pion-photon transition form factor are presented by employing a pion distribution amplitude obtained long ago from QCD sum rules with nonlocal condensates. These predictions comply with the Belle data but disagree with those of BaBar beyond 9 GeV{sup 2}.

Authors:
; ; ;  [1];  [2];  [3]
  1. Departamento de Fisica Teorica -IFIC, Universidad de Valencia-CSIC, E-46100 Burjassot, Valencia (Spain) and Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna (Russian Federation)
  2. (Russian Federation)
  3. (Germany)
Publication Date:
OSTI Identifier:
22075657
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1492; Journal Issue: 1; Conference: QCD-WORK 2012: International workshop on quantum chromodynamics: Theory and experiment, Lecce (Italy), 18-21 Jun 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CESR STORAGE RING; FORM FACTORS; FOUR MOMENTUM TRANSFER; LIGHT CONE; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PHOTON-PHOTON INTERACTIONS; PHOTONS; PIONS; QUANTUM CHROMODYNAMICS; SUM RULES

Citation Formats

Pimikov, A. V., Bakulev, A. P., Mikhailov, S. V., Stefanis, N. G., Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, and Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum. Pion-photon transition form factor in light-cone sum rules. United States: N. p., 2012. Web. doi:10.1063/1.4763506.
Pimikov, A. V., Bakulev, A. P., Mikhailov, S. V., Stefanis, N. G., Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, & Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum. Pion-photon transition form factor in light-cone sum rules. United States. doi:10.1063/1.4763506.
Pimikov, A. V., Bakulev, A. P., Mikhailov, S. V., Stefanis, N. G., Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, and Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum. Tue . "Pion-photon transition form factor in light-cone sum rules". United States. doi:10.1063/1.4763506.
@article{osti_22075657,
title = {Pion-photon transition form factor in light-cone sum rules},
author = {Pimikov, A. V. and Bakulev, A. P. and Mikhailov, S. V. and Stefanis, N. G. and Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna and Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum},
abstractNote = {We extract constraints on the pion distribution amplitude from available data on the pionphoton transition form factor in the framework of light-cone sum rules. A pronounced discrepancy (2.7 - 3){sigma} between the Gegenbauer expansion coefficients extracted from the CELLO, CLEO, and Belle experimental data relative to those from BaBar is found. Predictions for the pion-photon transition form factor are presented by employing a pion distribution amplitude obtained long ago from QCD sum rules with nonlocal condensates. These predictions comply with the Belle data but disagree with those of BaBar beyond 9 GeV{sup 2}.},
doi = {10.1063/1.4763506},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1492,
place = {United States},
year = {2012},
month = {10}
}