Topology change and nuclear symmetry energy in compact-star matter

  title={Topology change and nuclear symmetry energy in compact-star matter},
  author={Xiang Liu and Yong-Liang Ma and Mannque Rho},
  journal={Physical Review C},
We show that the cusp-like structure in the nuclear symmetry energy, a consequence of topology change, visible in the skyrmion lattice description of dense matter is extremely robust. It is present in the Skyrme model -- with the pion field only -- and is left unscathed by massive degrees of freedom such as the vector mesons $\rho$ and $\omega$ and also the scalar meson introduced as a dilaton. It leads to the emergence of parity-doubling at the skyrmion-half-skyrmion transition and impacts on… 

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