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The half-skyrmion phase in a chiral-quark model

AuthorsMantovani, Valentina; Vento, Vicente
Issue Date20-Jan-2014
CitationPhysics Letters - Section B 728: 323-327 (2014)
AbstractThe 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=1/2B=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.
Publisher version (URL)http://dx.doi.org/10.1016/j.physletb.2013.11.067
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