TY - JOUR
T1 - Evidence for strong dominance of proton-neutron correlations in nuclei
AU - Piasetzky, E.
AU - Sargsian, M.
AU - Frankfurt, L.
AU - Strikman, M.
AU - Watson, J. W.
PY - 2006
Y1 - 2006
N2 - 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 275-550MeV/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.
AB - 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 275-550MeV/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.
UR - http://www.scopus.com/inward/record.url?scp=33750179982&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.97.162504
DO - 10.1103/PhysRevLett.97.162504
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C2 - 17155393
AN - SCOPUS:33750179982
SN - 0031-9007
VL - 97
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
M1 - 162504
ER -