奇异夸克物质的夸克质量密度温度相关模型(英文)

Quark Mass Density-and Temperature-dependent Model for Strange Quark Matter

摘要: 在夸克质量密度相关模型处理奇异夸克物质滴时 ,会发现其半径随温度增加而变小 .为克服这一困难 ,我们通过使口袋常数 B温度参数化 ,引入了夸克质量密度温度相关模型 .在这一模型中 ,B=B0 1 - a(T/Tc) +b(T/Tc) 2 ,文章中讨论了参数 a,b的取法. It is found that the radius for a stable strangelet is a decreasing function of temperature in quark mass density- dependent model. To overcome this difficulty, we extend this model to quark mass density- and temperature- dependent model in which the vacuum energy density at zero baryon density limit B depends on temperature. An ansatz B=B 01-a(T/T c )+b(T/T c ) 2 is introduced and the regions for the best choice of the parameters are studied.

Abstract: It is found that the radius for a stable strangelet is a decreasing function of temperature in quark mass density- dependent model. To overcome this difficulty, we extend this model to quark mass density- and temperature- dependent model in which the vacuum energy density at zero baryon density limit B depends on temperature. An ansatz B=B 01-a(T/T c )+b(T/T c ) 2 is introduced and the regions for the best choice of the parameters are studied.