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STATISTICAL ERROR DOES NOT EXHAUST 3 PCT.
STATISTICAL ERROR DOES NOT EXHAUST 3 PCT.
STATISTICAL ERROR DOES NOT EXHAUST 3 PCT.
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The elastic electron-neutron cross section has been measured at four-momentum transfers squared (Q2) of 2.5, 4.0, 6.0, 8.0, and 10.0 (GeV/c)2 with use of a deuterium target and detection of the scattered electrons at 10°. The ratio of neutron to proton elastic cross sections decreases with Q2. At high Q2 this trend is inconsistent with the dipole law, form-factor scaling, and many vector dominance models, although it is consistent with some parton models.
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Results are presented from a search for the production of narrow p¯p states in antiproton interactions at 8.3 and 13.0 GeV/c. Cross-section upper limits have been established for four candidate baryonium states. The upper limits (95% probability level) range from 0.21 to 1.29 μb for inclusive forward production, and from 0.11 to 0.89 μb for backward production in the final state ωf0(p¯p).
CROSS SECTIONS ARE UPPER LIMITS OF 95 PCT CL.
CROSS SECTIONS ARE UPPER LIMITS OF 95 PCT CL.
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