Superfluid nuclear matter in BCS theory and beyond |
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| Authors: | CAO Li-Gang U. Lombardo P. Schuck |
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| Affiliation: | CAO Li-Gang1,2;1) U. Lombardo3 P. Schuck4 1 (Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China) 2 (Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China) 3 (Laboratori Nazionali del Sud, INFN, Via Santa Sofia 62, I-95123 Catania, Italy) 4 (Institut de Physique Nucléaire, Université Paris-Sud,F-91406 Orsay CEDEX, France) |
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| Abstract: | Medium polarization effects are studied for 1S0 pairing in nuclear matter within BHF approach.The screening potential is calculated in the RPA limit, suitably renormalized to cure the low density mechanical instability of nuclear matter. The self-energy corrections are consistently included resulting in a strong depletion of the Fermi surface. The self-energy effects always lead to a quenching of the gap, whereas it is almost completely compensated by the anti-screening effect in nuclear matter. |
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| Keywords: | pairing in nuclear matter self-energy effect medium effect |
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