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Frauenfelder, Hans Alde, Douglas Marshall 2011-06-28T15:53:35Z 2011-06-28T15:53:35Z 10000-01-01 1979 An experiment has been performed at the Argonne National Laboratory Zero Gradient Synchrotron to measure the dependence of the total proton-nucleon cross section on the helicity of the incident proton. A dependence of the total cross section on the proton helicity is a measure of the strength of the weak interaction in the hadronic system. The cross section was determined by measuring the transmission of 6 GeVlc polarized (-26.3 ± 7.5) 10 where 0 (0) is the total section for positive protons through an H20 target. integral counting techniques were used to achieve the high data rates required for the measurement of the small effect. We measured the cross section asymmetry (sigma+ - sigma_)/(sigma+ + sigma_) = (-26.3 +- 7.5) x 10-5 where sigma+ (sigma_) is the total cross section for positive (negative) helicity protons incident on an H20 target. The asymmetry is substantially larger than predicted by conventional theories of the weak interaction. Systematic contributions to the asymmetry are discussed. This result may include systematic contributions which were not measured or were measured Inadequately by our apparatus. Suggestions for improving the experiment are made. Preliminary results for the asymmetry from the improved version of the experiment are given which are consistent with zero. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-28T15:53:35Z No. of bitstreams: 1 1979_alde.pdf: 2782400 bytes, checksum: 4e13fb6caa45e929077b7bb11d789c22 (MD5) Made available in DSpace on 2011-06-28T15:53:35Z (GMT). No. of bitstreams: 1 1979_alde.pdf: 2782400 bytes, checksum: 4e13fb6caa45e929077b7bb11d789c22 (MD5) Previous issue date: 1979 Restriction data tranferred 2014-07-01T11:32:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-28T15:53:35Z Item is restricted indefinitely. Thesis U of I Only 397402 http://hdl.handle.net/2142/25550 en 1979 Douglas Marshall Alde parity non-conservation polarized proton-nucleon scattering incident proton helicity hadronic system A search for parity non-conservation in polarized proton-nucleon scattering at 6 GEV/C Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.