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Título: | Measurement of the gamma gamma* -> pi(0) transition form factor |
Autor: | Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Babar Collaboration; Aubert, B. | Fecha de publicación: | 11-sep-2009 | Editor: | American Physical Society | Citación: | Physical Review - Section D - Particles and Fields 80 (5): 052002 (2009) | Resumen: | We study the reaction e(+)e(-) -> e(+)e(-)pi(0) in the single tag mode and measure the differential cross section d sigma/dQ(2) and the gamma gamma* -> pi(0) transition form factor in the momentum transfer range from 4 to 40 GeV2. At Q(2) > 10 GeV2 the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb(-1) of integrated luminosity collected at PEP-II with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV. | Versión del editor: | http://dx.doi.org/ 10.1103/PhysRevD.80.052002 | URI: | http://hdl.handle.net/10261/21942 | DOI: | 10.1103/PhysRevD.80.052002 | ISSN: | 1550-7998 |
Aparece en las colecciones: | (IFIC) Artículos |
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transition form factor.pdf | 385,55 kB | Adobe PDF | Visualizar/Abrir |
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