Parity Violation in Proton-Proton Scattering at 221 MeV
2001; American Physical Society; Volume: 87; Issue: 27 Linguagem: Inglês
10.1103/physrevlett.87.272301
ISSN1092-0145
AutoresA. R. Berdoz, J. Bírchall, Jason Bryan Bland, J. D. Bowman, J. R. Campbell, G. H. Coombes, C. A. Davis, A A Green, P. W. Green, A. A. Hamian, R. L. Helmer, S. Kadantsev, Yu. E. Kuznetsov, L Lee, C. D. P. Levy, R. E. Mischke, S. A. Page, W. D. Ramsay, S. D. Reitzner, T. Ries, G. Roy, A. M. Sekulovich, J. Soukup, G. M. Stinson, Trevor J. Stocki, Vichet Sum, N. A. Titov, W. T. van Oers, R. J. Woo, S. Zadorozny, A. Zelenski,
Tópico(s)Particle physics theoretical and experimental studies
ResumoThe parity-violating longitudinal analyzing power, Az, has been measured in pp elastic scattering at an incident proton energy of 221 MeV. The result obtained is Az =(0.84 +/- 0.29 (stat.) +/- 0.17 (syst.)) x 10^{-7}. This experiment is unique in that it selects a single parity violating transition amplitude, 3P2-1D2, and consequently directly constrains the weak meson-nucleon coupling constant h^pp_rho When this result is taken together with the existing pp parity violation data, the weak meson-nucleon coupling constants h^pp_rho and h^pp_omega can, for the first time, both be determined.
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