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Engblom, P Thörngren; Barsov, S; Bertelli, S; Contalbrigo, M; Chiladze, D; Kacharava, A; Lenisa, P; Lomidze, N; Lorentz, B; Macharashvili, G; Merzlyakov, S; Mikirtytchiants, S; Nass, A; Oellers, D; Rathmann, F; Schleichert, R; Ströher, H; Tabidze, M; Trusov, S; Weidemann, C
Journal of physics. Conference series, 05/2011, Letnik: 295, Številka: 1Journal Article
Spin observables in proton deuteron breakup reactions at low energies offer a rich testing ground for the modern theory of nuclear forces, the chiral effective field theory (EFT). In the three-nucleon continuum the experimental data and the theoretical predictions are today at variance. At the PAX facility at COSY we plan to make an extensive study of analyzing powers and spin correlation parameters in pd breakup reactions at low energies between 30 and 50 MeV, an energy range where previous measurements are scarce and limited while three-nucleon effects are expected to be significant. Furthermore it is an ideal energy for the predictive power of chiral EFT to be tested. The longstanding physics question of the nature of three-nucleon forces will be studied with large coverage provided by an optimized silicon detector barrel, and flexibility utilizing the sampling method, a technique for direct comparison between experiment and theory developed specifically for the complex analysis of three-particle final states. The proposed experiment will yield an independent determination of the low-energy constants D and E and enable tests of appearing three-nucleon interactions in chiral EFT, with possible implications also for the spectra of light nuclei.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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