| Autor: |
Kaiser, N., Nikšić, T., Vretenar, D. |
| Předmět: |
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| Zdroj: |
European Physical Journal A -- Hadrons & Nuclei; Aug2005, Vol. 25 Issue 2, p257-261, 5p |
| Abstrakt: |
We use a recently improved version of the chiral nucleon-nucleon potential at next-to-next-to-leading order to calculate the 1 S0 pairing gap in isospin-symmetric nuclear matter. The pairing potential consists of the long-range one- and two-pion exchange terms and two short-distance NN-contact couplings. We find that the inclusion of the two-pion exchange at next-to-next-to-leading order reduces substantially the cutoff dependence of the 1 S0 pairing gap determined by solving a regularised BCS equation. Our results are close to those obtained with the universal low-momentum nucleon-nucleon potential Vlow-k or the phenomenological Gogny D1S force. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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