Nucleon Mass Splitting at Finite Isospin Chemical Potential
Sheng Chang, Jifeng Liu, Pengfei Zhuang
Abstract
We investigate nucleon mass splitting at finite isospin chemical potential in the frame of two flavor Nambu--Jona-Lasinio model. It is analytically proved that, in the phase with explicit isospin symmetry breaking the proton mass decreases and the neutron mass increases linearly in the isospin chemical potential.
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