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arXiv 0908.1099nucl-ex
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三核子力中的自旋-同位旋选择性

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… 展开作者

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

摘要:

精确的数据提出的分裂反应,$^2{\rm H}(\vec p,pp)n$,在核力研究的框架内。该实验是在KVI使用190兆电子伏的极化质子束撞击液体氘靶,并利用检测器,BINA。一些矢量分析的权力,并与国家的最先进的Faddeev计算,包括三核子力的影响。观察到与$^2{\rm H}(\vec p,^2$ He $)n$通道对应的运动学构型的数据和理论预测之间存在显著差异。这些结果与$^2{\rm H}(\vec p,d)p$反应进行了比较,以检验目前的三核子力模型的同位旋敏感性。目前的两个和三个核子力的模型是不足以描述一致的极化数据的两个同位旋状态。

英文摘要:

Precision data are presented for the break-up reaction, $^2{\rm H}(\vec p,pp)n$, 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 $^2{\rm H}(\vec p,^2$He$)n$ channel. These results are compared to the $^2{\rm H}(\vec p,d)p$ 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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