Quarks and baryons in QCD at finite density
Abstract
The mechanism of string creation for light quarks developed earlier is considered for nonzero quark chemical potential. A strong modification of the confining string due to finite quark density (chemical quark potential μ) is observed. As a surprising result in a multiquark system with a common string junction an attractive well appears of radius μ/σ and of an average depth equal to μ, which induces formation of multiquark hadrons. Preliminary estimates predict a new phase transition to multiquark hadron phase at rather high densities (in heavy ion collisions or in neutron stars) when neutron matter is compressed to 3-4 normal nuclear densities.
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