Initial-state radiation measurement of the e[superscript +] e-→π[superscript +]π[superscript -]π[superscript +] π[superscript -] cross section
We study the process e[superscript +] e-→π[superscript +]π[superscript -]π[superscript +] π[superscript -], with a photon emitted from the initial-state electron or positron, using 454.3 fb-1 of data collected with the BABAR detector at SLAC, corresponding to approximately 260 000 signal events. We...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/72148 |
| Summary: | We study the process e[superscript +] e-→π[superscript +]π[superscript -]π[superscript +] π[superscript -], with a photon emitted from the initial-state electron or positron, using 454.3 fb-1 of data collected with the BABAR detector at SLAC, corresponding to approximately 260 000 signal events. We use these data to extract the nonradiative σ(e[superscript +] e-→π[superscript +]π[superscript -]π[superscript +] π[superscript -]) cross section in the energy range from 0.6 to 4.5 GeV. The total uncertainty of the cross section measurement in the peak region is less than 3%, higher in precision than the corresponding results obtained from energy scan data. |
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