The half-skyrmion phase in a chiral-quark model

• Main Authors: Sarti, Valentina Mantovani, Vento, Vicente
• Format: Journal Article
• Language: English
• Published: 09-11-2013
• Subjects: Physics - High Energy Physics - Phenomenology; Physics - Nuclear Theory
• DOI: 10.48550/arxiv.1309.0639

The Chiral Dilaton Model, where baryons arise as non-topological solitons
built from the interaction of quarks and chiral mesons, shows in the high
density low temperature regime a two phase scenario in the nuclear matter phase
diagram. Dense soliton matter described by the Wigner-Seitz approximation
generates a periodic potential in terms of the sigma and pion fields that leads
to the formation of a band structure. The analysis up to three times nuclear
matter density shows that soliton matter undergoes two separate phase
transitions: a delocalization of the baryon number density leading to $B=1/2$
structures, as in skyrmion matter, at moderate densities, and quark
deconfinement at larger densities. This description fits well into the
so-called quarkyonic phase where, before deconfinement, nuclear matter should
undergo structural changes involving the restoration of fundamental symmetries
of QCD.