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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131639
Measurement of the γγ*→π0 transition form factor
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We study the reaction e + e − → e + e − π 0 in the single tag mode and measure the differential cross section d σ / d Q 2 and the γ γ ∗ → π 0 transition form factor in the momentum transfer range from 4 to 40 GeV 2 . At Q 2 > 10 GeV 2 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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GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Measurement of the γγ*→π0 transition form factor. Physical Review D. 2009. Vol. 80, num. 5, pags. 052002. ISSN 1550-7998. [consulted: 13 of June of 2026]. Available at: https://hdl.handle.net/2445/131639