Spin-isospin selectivity in three-nucleon forces

H. Mardanpour, H. R. Amir-Ahmadi, R. Benard, A. Biegun, M. Eslami-Kalantari, L. Joulaeizadeh, N. Kalantar-Nayestanaki, M. Kiš, St Kistryn, A. Kozela, H. Kuboki, Y. Maeda, M. Mahjour-Shafiei, J. G. Messchendorp, K. Miki, S. Noji, A. Ramazani-Moghaddam-Arani, H. Sakai, M. Sasano, K. SekiguchiE. Stephan, R. Sworst, Y. Takahashi, K. Yako

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37 Citations (Scopus)

Abstract

Precision data are presented for the break-up reaction, 2H (over(p, →), p p) n, within the framework of nuclear-force studies. The experiment was carried out at KVI using a polarized-proton beam of 190 MeV impinging on a liquid-deuterium target and by exploiting the detector, BINA. Some of the vector-analyzing powers are presented and compared with state-of-the-art Faddeev calculations including three-nucleon forces effect. Significant discrepancies between the data and theoretical predictions were observed for kinematical configurations which correspond to the 2H (over(p, →), 2He) n channel. These results are compared to the 2H (over(p, →), d) p reaction to test the isospin sensitivity of the present three-nucleon force models. The current modeling of two and three-nucleon forces is not sufficient to describe consistently polarization data for both isospin states.

Original languageEnglish
Pages (from-to)149-153
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume687
Issue number2-3
DOIs
Publication statusPublished - 2010 Apr 12
Externally publishedYes

Keywords

  • Nuclear forces
  • Polarization phenomena
  • Proton-deuteron break-up
  • Three-nucleon force

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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