DPG Phi
Verhandlungen
Verhandlungen
DPG

Gießen 2007 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HK: Fachverband Physik der Hadronen und Kerne

HK 27: Theorie

HK 27.2: Talk

Wednesday, March 14, 2007, 11:30–11:45, C

Dependence of the 1S0 superfluid pairing gap on nuclear interactions — •Kai Hebeler1, Achim Schwenk2, and Bengt Friman11GSI, Darmstadt, Germany — 2TRIUMF, Vancouver, Canada

We study in detail the dependence of the 1S0 superfluid pairing gap on nuclear interactions and on charge-independence breaking at the BCS level. Starting from chiral effective-field theory and conventional nucleon-nucleon interactions, we use the renormalization group to generate low-momentum interactions Vlow k with sharp and smooth regulators. The resulting BCS gaps are well constrained by the nucleon-nucleon scattering phase shifts, and the cutoff dependence is very weak for sharp or sufficiently narrow smooth regulators with cutoffs Λ > 1.6   fm−1. It is therefore likely that the effect of three-nucleon interactions on 1S0 superfluidity is small at the BCS level. The charge dependence of nuclear interactions has a 10 % effect on the pairing gap.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2007 > Gießen