Measurement of the YY*--> pi 0 transition form factor
Author(s)
Dujmic, Denis; Henderson, Shawn Wesley; Sciolla, Gabriella; Yamamoto, R. K.; Zhao, M.; Fisher, Peter H; Cowan, Ray F; Spitznagel, Michael A; ... Show more Show less
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Alternative title
Measurement of the γγ*→π0 transition form factor
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Show full item recordAbstract
We study the reaction e[superscript +]e[superscript -]→e[superscript +]e [superscript -]π[superscript 0] in the single tag mode and measure the differential cross section dσ/dQ[superscript 2] and the γγ[superscript *]→π[superscript 0] transition form factor in the momentum transfer range from 4 to 40 GeV[superscript 2]. At Q[superscript 2]>10 GeV[superscript 2] the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb[superscript -1] of integrated luminosity collected at PEP-II with the BABAR detector at e[superscript +]e[superscript -] center-of-mass energies near 10.6 GeV.
Date issued
2009-09Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
BABAR Collaboration. "Measurement of the YY*--> pi 0 transition form factor." Phys. Rev. D 80, 052002 (2009)© 2009 The American Physical Society
Version: Final published version