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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, Elżbieta
Witała, H.
Keywords: polarization data; theoretical predictions; proton-deuteron break-up
Issue Date: 2020
Citation: "The European Physical Journal A", Vol. 56, iss. 10, 2020, art. no. 249, s. 1-13
Abstract: A measurement of the analyzing powers for the 2H(p⃗ ,pp)n break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of 135MeV. The scattering angles and energies of the final-state protons were measured using the Big Instrument for Nuclear-polarization Analysis (BINA) with a nearly 4π 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.
DOI: 10.1140/epja/s10050-020-00255-0
ISSN: 1434-6001
Appears in Collections:Artykuły (WNP)

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