张量关联在（p,pd）反应研究的高动量核子对中的主导地位。

Dominance of Tensor Correlations in High-Momentum Nucleon Pairs Studied by (p,pd) Reaction.

机构信息

School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China.

International Research Center for Nuclei and Particles in Cosmos, Beihang University, 100191 Beijing, China.

出版信息

Phys Rev Lett. 2018 Dec 14;121(24):242501. doi: 10.1103/PhysRevLett.121.242501.

DOI:10.1103/PhysRevLett.121.242501

PMID:30608744

Abstract

The isospin character of p-n pairs at large relative momentum has been observed for the first time in the ^{16}O ground state. A strong population of the J,T=1,0 state and a very weak population of the J,T=0,1 state were observed in the neutron pickup domain of ^{16}O(p,pd) at 392 MeV. This strong isospin dependence at large momentum transfer is not reproduced by the distorted-wave impulse approximation calculations with known spectroscopic amplitudes. The results indicate the presence of high-momentum protons and neutrons induced by the tensor interactions in the ground state of ^{16}O.

摘要

首次在^{16}O 基态中观察到了大相对动量下 p-n 对的同位旋特征。在 392 MeV 的^{16}O(p,pd)中子俘获域中观察到了 J,T=1,0 态的强烈布居和 J,T=0,1 态的非常弱的布居。这种大动量转移下的强烈同位旋依赖性不能用已知光谱振幅的扭曲波冲量近似计算来重现。结果表明，在^{16}O 的基态中，张量相互作用诱导了具有高动量的质子和中子。