Measurement of the YY*--> pi 0 transition form factor
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 4...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/54721 https://orcid.org/0000-0002-8667-5660 |
| Summary: | 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. |
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