Contribution of the two-photon annihilation process in the measurement of sigma/sub t/ (e⁺e/sup /minus//. -->. hadrons at PEP) [electronic resource]
The possible impact of the 2..gamma.. process e/sup +/e/sup/minus// ..-->.. e/sup /plus//e/sup /minus// /plus/ hadrons is evaluated as a source of background for the study of the one photon annihilation process. Two regions of hadron system invariant mass are considered---the resonance region wit...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Menlo Park, Calif. : Oak Ridge, Tenn. :
Stanford Linear Accelerator Center. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1988.
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| Subjects: |
| Summary: | The possible impact of the 2..gamma.. process e/sup +/e/sup/minus// ..-->.. e/sup /plus//e/sup /minus// /plus/ hadrons is evaluated as a source of background for the study of the one photon annihilation process. Two regions of hadron system invariant mass are considered---the resonance region with low invariant mass, and the ''diffractive'' region above 2 GeV hadron invariant mass. In spite of the fact that the 2..gamma.. cross-section rises with the energy of the initial e/sup /plus//e/sup /minus// system, it seems clear that measurements of the total energy of the final hadron system will allow the clean separation of the 2..gamma.. events from the single photon annihilation reaction. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/1988. "slac-pep-note-145" "DE88014820" Shen, B. |
| Physical Description: | Pages: 7 : digital, PDF file. |