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=B0[1-a(T/Tc)+b(T/Tc)2] is introduced and the regions for the best choice of the parameters are studied.
参考文献
| [1] | Greiner C, Koch P, Stocker H. Separation of Strangene ss from Antistrangeness in the Phase Transition from Quark to Hadron Matter: Po ssible formation of strange quark matter in heavy-ion collisions[J]. Phys Rev Lett, 1987, 58(18): 1 825-1 828. |
| [2] | Plümer M, Raha S, Weiner R M. Effect of Confinement on the Sound Velocity in a Guark-gluon Plasma[J]. Phys Lett, 1984, B139(3): 198-202. |
| [3] | Chakrabarty S. Equation of State of Strange Guark Mat ter and Strange Star[J]. Phys Rev, 1991, D43(2): 627-630. |
| [4] | Benrenuto O G, Lugones G. Strange Matter Equation of State in the Quark Mass-density-dependent Model[J]. Phys Rev, 1995, D51(4): 1 989-1 993. |
| [5] | Peng G X, Ning P Z, Chiang H Q. Quark Condensates and Strange Quark Matter[J]. Phys Rev, 1997, C56(1): 491-496. |
| [6] | Peng G X, Chiang H C, Zou B S, et al. Thermodynam ics, Strange Quark Matter, and Strange Stars[J]. Phys Rev, 2000, C62: 025801-1-025801-7. |
| [7] | Peng G X, Chiang H C, Ning P Z, et al. Charge and Critical Density of Strange Quark Matter[J]. Phys Rev, 1999, C59(6): 3 452-3 454. |
| [8] | Wang P. Strange Matter in a Self-consistent Quark Ma ss-density-dependent Model[J]. Phys Rev, 2000, C62: 015204-1-015204-5. |
| [9] | He Y B, Gao C S, Li X Q, et al. Properties of Str angelets at Finite Temperature in the Liquid Drop Model[J]. Phys Rev, 1996, C5 3(4): 1 903-1 910. |
| [10] | Gilson E P, Jaffe R L. Stability of Very Small Strang elets[J]. Phys Rev Lett, 1993, 71(3): 332-335. |
| [11] | Madsen J. Shell Model Versus Liq uid Drop Mo del for Strangelets[J]. Phys Rev, 1994, D50(5): 3 329-3 331. |
| [12] | Distillation and Survival of Strange-quark-ma tter D roplets in Ultrarelativistic Heavy-ion Collisions[J]. Phys Rev, 1991, D44(11): 3 517-3 529. |
| [13] | Stability of Strange Quark Matter at T ≠0[J]. Phys Rev, 1993, D48(3): 1 409-1 417. |
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