• DOI:10.1103/PhysRevC.99.055808
• Corpus ID: 118978176

Topology change and nuclear symmetry energy in compact-star matter

@article{Liu2018TopologyCA,
  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},
  year={2018}
}

• Xiang Liu, Yong-Liang Ma, M. Rho
• Published 25 November 2018
• Physics
• 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 the nuclear symmetry energy "wilderness" landscape, weeding out roughly half of the wilderness. It is shown that a pseudo-conformal sound velocity arises at a precocious density at which the cusp is formed. It is suggested that the topology change, being robust, could impact on the tidal deformability observed in gravity waves