Naslov
Nuclear pairing from chiral pion-nucleon dynamics

Autori
Kaiser, Norbert ; Nikšić, Tamara ; Vretenar, Dario

Izvornik
The European physical journal. A, Hadrons and nuclei (1434-6001) 25 (2005), 2; 257-261

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
13.75.Gx Pion-baryon interactions; 21.30.Cb Nuclear forces in vacuum; 21.30.Fe Forces in hadronic systems and effective interactions; 21.60.-n Nuclear structure models and methods

Sažetak
We use a recently improved version of the chiral nucleon-nucleon potential at next-to-next-to-leading order to calculate the 1S0 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 1S0 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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