Photoproduction of Eta Mesons from Hydrogen at 0° and 180° for Energies Between 0.7 and 1.1 Gev
<p>We have measured, using the Caltech 1.5-GeV electron synchrotron, the cross section for γp → pη(η → γγ) at 0° and 180 in the energy range 0.7 to 1.1 GeV. Two totally-absorbing lead glass Cherenkov counters detected both photons from the decay η → γγ, while the recoil proton went undetected...
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https://thesis.library.caltech.edu/1418/1/Mcneely_jr_wa_1971.pdfMcNeely, William Atwood (1971) Photoproduction of Eta Mesons from Hydrogen at 0° and 180° for Energies Between 0.7 and 1.1 Gev. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/VF72-6C14. https://resolver.caltech.edu/CaltechETD:etd-04192005-104101 <https://resolver.caltech.edu/CaltechETD:etd-04192005-104101>