Idioma:

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

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

AIP conference proceedings, 2012, Vol.1492 (1) [Periódico revisado por pares]

Sem texto completo

Citações Citado por

Título:
Pion-photon transition form factor in light-cone sum rules
Autor: 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
Assuntos: CESR STORAGE RING ; FORM FACTORS ; FOUR MOMENTUM TRANSFER ; LIGHT CONE ; MULTIPARTICLE SPECTROMETERS ; PARTICLE IDENTIFICATION ; PHOTON-PHOTON INTERACTIONS ; PHOTONS ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; PIONS ; QUANTUM CHROMODYNAMICS ; SUM RULES
É parte de: AIP conference proceedings, 2012, Vol.1492 (1)
Descrição: 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}.
Editor: United States
Idioma: Inglês

Links

Voltar para lista de resultados