Λ-Nucleon Charge-Symmetry-Breaking Interaction. II. Rank-2 Potentials

Charge independence breaking and charge symmetry breaking in the nucleon–nucleon interaction from effective field theory

We discuss charge symmetry and charge independence breaking in an effective field theory approach for few–nucleon systems. We systematically introduce strong isospin–violating and electromagnetic operators in the theory. The charge dependence observed in the nucleon–nucleon scattering lengths is due to one–pion exchange and one electromagnetic four–nucleon contact term. This gives a parameter f...

Charge symmetry breaking of the nucleon-nucleon interaction: ρ-ω mixing versus nucleon mass splitting

We investigate three models for the charge symmetry breaking (CSB) of the nucleon-nucleon (NN) interaction (based upon ρ-ω mixing, nucleon mass splitting, and phenomenology) that all reproduce the empirical value for the CSB of the S0 scattering length (∆aCSB) accurately. We reveal that these models make very different predictions for CSB in PJ waves and examine the impact of this on some obser...

Charge-Symmetry-Breaking Three-Nucleon Forces

Leading-order three-nucleon forces that violate isospin symmetry are calculated in Chiral Perturbation Theory. The effect of the charge-symmetrybreaking three-nucleon force is investigated in the trinucleon systems using Faddeev calculations. We find that the contribution of this force to the 3He – 3H binding-energy difference is given by ∆ECSB 3NF ≃ 5 keV.

Isospin symmetry breaking nucleon-nucleon potentials and nuclear structure

Modern nucleon-nucleon (NN) potentials, which accurately fit the nucleon-nucleon scattering phase shifts, contain terms which break isospin symmetry. The effects of these symmetry violating terms on the bulk properties of nuclear matter are investigated. The predictions of the charge symmetry breaking (CSB) terms are compared with the Nolen-Schiffer (NS) anomaly regarding the energies of neighb...

NUCLEON - NUCLEON CHARGE SYMMETRY BREAKING IN i - p ' SCATTERING