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Measurement of the gamma gamma* -> pi(0) transition form factor
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BaBaR Collaboration (Including:
). (2009) Measurement of the gamma gamma* -> pi(0) transition form factor. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.80 (No.5). article no. 052002. doi:10.1103/PhysRevD.80.052002 ISSN 1550-7998.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.80.052002
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.
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