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29 March 2024
 
  » arxiv » nucl-th/9506021

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Colour-singlet strangelets at finite temperature
M. G. Mustafa ; A. Ansari ;
Date 23 Jun 1995
Journal Phys.Rev. C55 (1997) 2005-2009
Subject nucl-th
AbstractConsidering massless $u$ and $d$ quarks, and massive (150 MeV) $s$ quarks in a bag with the bag pressure constant $B^{1/4} = 145$ MeV, a colour-singlet grand canonical partition function is constructed for temperatures $T = 1-30$ MeV. Then the stability of finite size strangelets is studied minimizing the free energy as a function of the radius of the bag. The colour-singlet restriction has several profound effects when compared to colour unprojected case: (1) Now bulk energy per baryon is increased by about $250$ MeV making the strange quark matter unbound. (2) The shell structures are more pronounced (deeper). (3) Positions of the shell closure are shifted to lower $A$-values, the first deepest one occuring at $A=2$, famous $H$-particle ! (4) The shell structure at $A=2$ vanishes only at $Tsim 30$ MeV, though for higher $A$-values it happens so at $Tsim 20$ MeV.
Source arXiv, nucl-th/9506021
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