A measurement of the spin transfer observable D{sub NN{prime}} for p+p elastic scattering at T{sub p}=200 MeV
- Indiana University Cyclotron Facility, Bloomington, Indiana 47408 (United States)
- University of Louisville, Louisville, Kentucky 40292 (United States)
- Queen Mary College, London (United Kingdom)
Recent analyses of NN and {pi}N scattering data have resulted in values for the {pi}NN coupling constant which are significantly smaller than those obtained prior to 1987. These controversial results prompted us to investigate the usefulness of high-quality spin measurements towards resolving this issue. We found that the normal component spin transfer observable D{sub NN{prime}} for p+p elastic scattering is very sensitive to {ital g}{sup 2}{sub 0}, particularly at small angles. We have therefore determined precise values of D{sub NN{prime}} for this reaction for {theta}{sub {ital lab}}=5.0{degree}, 7.2{degree}, 8.4{degree}, 9.7{degree}, 11.8{degree}, 14.6{degree}, 18.8{degree}, 24{degree}, 30{degree}, and 38{degree} at an incident beam energy of 200 MeV. The forward-going proton was detected in the IUCF K600 spectrometer and the coincident recoil proton was detected in a Si/CsI detector telescope. Our preliminary D{sub NN{prime}} values are reproduced reasonably well by Arndt`s C200 solution, the Nijmegen PWA93, and the Nijmegen I potential, but differ severely from both Arndt`s SM94 global solution and the predictions of the Bonn potential.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 172284
- Report Number(s):
- CONF-9409103--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 339; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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