Dominance of Tensor Correlations in High-Momentum Nucleon Pairs Studied by (p,pd) Reaction.
/ Authors
S. Terashima, L. Yu, H. Ong, I. Tanihata, S. Adachi, N. Aoi, P. Chan, H. Fujioka, M. Fukuda, H. Geissel
and 22 more authors
G. Gey, J. Golak, E. Haettner, C. Iwamoto, Takeo Kawabata, H. Kamada, X. Le, H. Sakaguchi, A. Sakaue, C. Scheidenberger, R. Skibiński, B. Sun, A. Tamii, T. L. Tang, D. T. Tran, K. Topolnicki, T. Wang, Y. Watanabe, H. Weick, H. Witała, Guo-feng Zhang, Li-Hua Zhu
/ 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.
Journal: Physical review letters