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- Title
A comprehensive study of analyzing powers in the proton–deuteron break-up channel at 135 MeV.
- Authors
Bayat, M. T.; Tavakoli-Zaniani, H.; Amir-Ahmadi, H. R.; Deltuva, A.; Eslami-Kalantari, M.; Golak, J.; Kalantar-Nayestanaki, N.; Kistryn, St.; Kozela, A.; Mardanpour, H.; Messchendorp, J. G.; Mohammadi-Dadkan, M.; Ramazani-Moghaddam-Arani, A.; Ramazani-Sharifabadi, R.; Skibiński, R.; Stephan, E.; Witała, H.
- Abstract
A measurement of the analyzing powers for the 2 H (p → , p p) n break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of 135 MeV . The scattering angles and energies of the final-state protons were measured using the Big Instrument for Nuclear-polarization Analysis (BINA) with a nearly 4 π geometrical acceptance. In this work, we analyzed a large number of kinematical geometries including forward–forward configurations in which both the final-state particles scatter to small polar angles and backward–forward configurations in which one of the final-state particles scatters to large polar angles. The results are compared with Faddeev calculations based on modern nucleon–nucleon (NN) and three-nucleon (3N) potentials. Discrepancies between polarization data and theoretical predictions are observed for configurations corresponding to small relative azimuthal angles between the two final-state protons. These configurations show a large sensitivity to 3N force effects.
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2020, Vol 56, Issue 10, p1
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/s10050-020-00255-0