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Spin–isospin Selectivity in Three-nucleon Forces by 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. Sekiguchi; E. Stephan; R. Sworst; Y. Takahashi; K. Yako is a Physics and Astronomy article available to read on EtoBox.

What is Spin–isospin Selectivity in Three-nucleon Forces about?

Precision data are presented for the break-up reaction, 2 H( p, pp)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 2 H( p, 2 He)n channel. These results are compared to the 2 H( 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.

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Author

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. Sekiguchi; E. Stephan; R. Sworst; Y. Takahashi; K. Yako

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0370-2693)

Published

2010

Language

EN

Field

Physics and Astronomy (Physical Sciences)