The Friedberg-Lee model at finite temperature and density

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dc.creatorMao, Hong
dc.creatorYao, Minjie
dc.creatorZhao, Wei-Qin
dc.date2007-11-29
dc.date2008-05-20
dc.date.accessioned2026-07-07T11:38:59Z
dc.date.available2026-07-07T11:38:59Z
dc.descriptionThe Friedberg-Lee model is studied at finite temperature and density. By using the finite temperature field theory, the effective potential of the Friedberg-Lee model and the bag constant $B(T)$ and $B(T,μ)$ have been calculated at different temperatures and densities. It is shown that there is a critical temperature $T_{C}\simeq 106.6 \mathrm{MeV}$ when $μ=0 \mathrm{MeV}$ and a critical chemical potential $μ\simeq 223.1 \mathrm{MeV}$ for fixing the temperature at $T=50 \mathrm{MeV}$. We also calculate the soliton solutions of the Friedberg-Lee model at finite temperature and density. It turns out that when $T\leq T_{C}$ (or $μ\leq μ_C$), there is a bag constant $B(T)$ (or $B(T,μ)$) and the soliton solutions are stable. However, when $T>T_{C}$ (or $μ>μ_C$) the bag constant $B(T)=0 \mathrm{MeV}$ (or $B(T,μ)=0 \mathrm{MeV}$) and there is no soliton solution anymore, therefore, the confinement of quarks disappears quickly.
dc.description12 pages, 11 figures; version accepted for publication in Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/0711.4643
dc.identifierhttp://arxiv.org/abs/0711.4643
dc.identifierPhys.Rev.C77:065205,2008
dc.identifierdoi:10.1103/PhysRevC.77.065205
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199765
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleThe Friedberg-Lee model at finite temperature and density
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