Evidence for strong dominance of proton-neutron correlations in nuclei

被引：231

作者：

Piasetzky, E. ^{[1
]}

Sargsian, M.

Frankfurt, L.

Strikman, M.

Watson, J. W.

机构：

[1] Tel Aviv Univ, Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] Florida Int Univ, Dept Phys, Miami, FL 33199 USA

[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[4] Kent State Univ, Dept Phys, Kent, OH 44242 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.97.162504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze recent data from high-momentum-transfer (p, pp) and (p, ppn) reactions on carbon. For this analysis, the two-nucleon short-range correlation (NN-SRC) model for backward nucleon emission is extended to include the motion of the NN pair in the mean field. The model is found to describe major characteristics of the data. Our analysis demonstrates that the removal of a proton from the nucleus with initial momentum 275-550 MeV/c is 92(-18)(+8)% of the time accompanied by the emission of a correlated neutron that carries momentum roughly equal and opposite to the initial proton momentum. This indicates that the probabilities of pp or nn SRCs in the nucleus are at least a factor of 6 smaller than that of pn SRCs. Our result is the first estimate of the isospin structure of NN-SRCs in nuclei, and may have important implication for modeling the equation of state of asymmetric nuclear matter.

引用

页数：4

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