Neutron-proton pairing in Nuclear Matter

Abstract

The self-energy effect on the neutron-proton (np) pairing gap is investigated up to the third order within the framework of the extend Bruecker-Hartree-Fock (BHF) approach combined with the BCS theory. The self-energy up to the second-order contribution turns out to reduce strongly the effective energy gap, while the \emph{renormalization} term enhances it significantly. In addition, the effect of the three-body force on the np pairing gap is shown to be negligible. To connect the present results with the np pairing in finite nuclei, an effective density-dependent zero-range pairing force is established with the parameters calibrated to the microscopically calculated energy gap.

References in corpus (24)

• Pairing in nuclear systems: from neutron stars to finite nuclei
• Asymmetric Nuclear Matter from Extended Brueckner-Hartree-Fock Approach
• Overview of Neutron-Proton Pairing
• Interplay of Three-Body Interactions in the EOS of Nuclear Matter
• Screening Effects in Superfluid Nuclear and Neutron Matter within Brueckner Theory
• Thermodynamics of $n$-$p$ condensate in asymmetric nuclear matter
• Spin-triplet pairing in large nuclei
• Isovector spin-singlet (T=1, S=0) and isoscalar spin-triplet (T=0, S=1) pairing interactions and spin-isospin response
• Dispersive effects in neutron matter superfluidity
• 3PF2 pairing in high-density neutron matter
• Screening Effects on ${}^1{S}_0$ Pairing in Neutron Matter
• Self-energy Effects in the Superfluidity of Neutron Matter
• Isospin singlet (pn) pairing and quartetting contribution to the binding energy of nuclei
• Spatially inhomogeneous condensate in asymmetric nuclear matter
• Screening of nuclear pairing in nuclear and neutron matter
• Reduction of superfluid gap by scattering
• Minimal Relativity and ${}^3{S}_1$-${}^3{D}_1$ Pairing in Symmetric Nuclear Matter
• Superfluidity with dressed nucleons
• Angle-dependent Gap state in Asymmetric Nuclear Matter
• Three-body force effect on off-shell mass operator and spectral functions in nuclear matter
• Medium polarization in asymmetric nuclear matter
• Medium polarization effects in 3SD1 spin-triplet pairing
• Isoscalar neutron-proton pairing and SU(4)-symmetry breaking in Gamow-Teller transitions
• FFLO state with angle dependent Gap in Asymmetric Nuclear Matter

Cited by in corpus (4)

• Nucleon momentum distributions in asymmetric nuclear matter
• Role of nucleon-nucleon correlation in transport coefficients and gravitational-wave-driven $r$-mode instability of neutron stars
• Pairing properties of semilocal coordinate&momentum-space regularized chiral interactions
• Phase diagrams of neutron-proton superfluid in asymmetric nuclear matter