Parity Violation in Proton-Proton Scattering
| Autor: | A.R. Berdoz, J. Birchall, J.D. Bowman, J.R. Campbell, C.A. Davis, A.A. Green, P.W. Green, A.A. Hamian, D.C. Healey, R. Helmer, S. Kadantsev, Y. Kuznetsov, R. Laxdal, L. Lee, C.D.P. Levy, R.E. Mischke, S.A. Page, W.D. Ramsay, S.D. Reitzner, G. Roy, P.W. Schmor, A.M. Sekulovich, J. Soukup, G.M. Stinson, T. Stocki, V. Sum, N.A. Titov, W.T.H. van Oers, R-J. Woo, A.N. Zelenski |
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| Rok vydání: | 1997 |
| Předmět: |
Coupling constant
Physics Nuclear and High Energy Physics Meson 010308 nuclear & particles physics Scattering Hadron Nuclear Theory FOS: Physical sciences Parity (physics) Weak interaction 01 natural sciences Nuclear physics High Energy Physics - Phenomenology Amplitude High Energy Physics - Phenomenology (hep-ph) Proton scattering 0103 physical sciences Physics::Accelerator Physics High Energy Physics::Experiment Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment |
| DOI: | 10.48550/arxiv.nucl-ex/9708003 |
| Popis: | Measurements of parity-violating longitudinal analyzing powers (normalized asymmetries) in polarized proton-proton scattering provide a unique window on the interplay between the weak and strong interactions between and within hadrons. Several new proton-proton parity violation experiments are presently either being performed or are being prepared for execution in the near future: at TRIUMF at 221 MeV and 450 MeV and at COSY (Kernforschungsanlage Juelich) at 230 MeV and near 1.3 GeV. These experiments are intended to provide stringent constraints on the set of six effective weak meson-nucleon coupling constants, which characterize the weak interaction between hadrons in the energy domain where meson exchange models provide an appropriate description. The 221 MeV is unique in that it selects a single transition amplitude (3P2-1D2) and consequently constrains the weak meson-nucleon coupling constant h_rho{pp}. The TRIUMF 221 MeV proton-proton parity violation experiment is described in some detail. A preliminary result for the longitudinal analyzing power is Az = (1.1 +/-0.4 +/-0.4) x 10^-7. Further proton-proton parity violation experiments are commented on. The anomaly at 6 GeV/c requires that a new multi-GeV proton-proton parity violation experiment be performed. Comment: 13 Pages LaTeX, 5 PostScript figures, uses espcrc1.sty. Invited talk at QULEN97, International Conference on Quark Lepton Nuclear Physics -- Nonperturbative QCD Hadron Physics & Electroweak Nuclear Processes --, Osaka, Japan May 20--23, 1997 |
| Databáze: | OpenAIRE |
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