Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-08-24
Phys.Lett.B524:93-98,2002
Physics
Nuclear Physics
Nuclear Theory
7 pages RevTex, 3 figures, 1 table
Scientific paper
10.1016/S0370-2693(01)01363-6
We present an accurate nucleon-nucleon ($NN$) potential based upon chiral effective Lagrangians. The model includes one- and two-pion exchange contributions up to chiral order three. We show that a quantitative fit of the $NN$ $D$-wave phase shifts requires contact terms (which represent the short range force) of order four. Within this framework, the $NN$ phase shifts below 300 MeV lab. energy and the properties of the deuteron are reproduced with high-precision. This chiral $NN$ potential represents a reliable starting point for testing the chiral effective field theory approach in exact few-nucleon and microscopic nuclear many-body calculations. An important implication of the present work is that the chiral $2\pi$ exchange at order four is of crucial interest for future chiral $NN$ potential development.
Entem D. R.
Machleidt Ruprecht
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