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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/21942
Title: Measurement of the gamma gamma* -> pi(0) transition form factor
Authors: Azzolini, Virginia; López-March, Neus; Martínez-Vidal, Fernando; Milanés, Diego A.; Oyanguren, Arantza; Babar Collaboration; Aubert, B.
Issue Date: 11-Sep-2009
Publisher: American Physical Society
Citation: Physical Review - Section D - Particles and Fields 80 (5): 052002 (2009)
Abstract: 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.
Publisher version (URL): http://dx.doi.org/ 10.1103/PhysRevD.80.052002
URI: http://hdl.handle.net/10261/21942
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.80.052002
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