J . S . Poucher

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BACKGROUND Hernia repair is the second most frequently performed operation in France and in the United States, the prevalence being 36 for every 1000 males. Lowering the recurrence rate by 1% would mean 1000 fewer operations for hernia repair per year in France. METHODS Between 1983 and 1989, 1578 adult males with a total of 1706 nonrecurrent inguinal(More)
We have measured the deep inelastic electromagnetic structure functions of steel, deuterium and hydrogen nuclei using the high energy electron beam at the Stanford Linear Accelerator Center. The ratio of the structure functions of steel and deuterium cannot be understood simply by corrections due to Fermi motion effects. The data indicate that the quark(More)
In a subsequent short run the useful neutrino event rate has climbed to about 15 events per hour, still without focusing of the secondary hadrons. We assume that the average muon energy is ~ of the neutrino energy. This assumption is consistent with the neutrino energy distribution determined for events observed in the calorimeter, after applying(More)
Previous comparison [ 1,2] of deep-inelastic electronneutron and electron-proton scattering cross sections have shown that the differential cross section ratio On/O p decreases with decreasing 60 in the threshold (co < 3) region to a value close to the quark model lower bound [3] of 0.25. We present here results of an experiment which improves the accuracy(More)
Differential cross sections for electron scattering from hydrogen and deuterium in the deep inelastic region show that the neutron cross section is significantly smaller than the proton cross section over a large part of the kinematic region studied. Although $W2d differs in magnitude from '&W2p, it exhibits a similar scaling behavior. + Present Address:(More)
Differential cross sections for the inelastic scattering of electrons from hydrogen, deuterium, beryllium, aluminum, copper and gold have been measured at incident electron energies of up to 19.5 GeV at a laboratory scattering angle of six degrees. In the final state only the electron was detected. Within the stated errors, the cross sections were found to(More)
¢' Work supported in part by the U.S, Atomic Energy Commission under Contracts AT(11-1)-3069 and AT(04-3)-515. • 1 Present address: Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305. • 2 Present address: National Accelerator Laboratory, Batavia, Illinois 60510. • 3 Present address: Laboratory of Nuclear Studies, Cornell(More)
A study of m d interactions at 13.2 GeV/c has been performed using the SLAC 2-m streamer chamber with a forward-proton trigger/spectrometer. In this paper, we discuss baryon-antibaryon final states where a forward produced pp enhancement is seen near 2. 1 GeV in both ppn and ppn n final states. The measured cross section for m' d ~(n, )ppn is 7.6+ 1.3 pb(More)
We report measurements of the ratio of the deep-inelastic electronneutron to electron-proton differential cross sections in the threshold (w < 3) region. The ratio was found to scale and to decrease monotonically with decreasing w. No violation of the quark model lower bound of 0.25 was observed in the ratio. (Submitted to Physics Letters B) * Work(More)
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