Dense hadron star in quark degree of freedom

The quark degree of freedom may play an important role as one studies dense hadron stars which can help to understand the universe origin. We add a temperature dependence to the effective quark mass adopted from a quark-quark interaction on the QCD basis to probe properties of the star in the quark...

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Bibliographic Details
Published in:EPJ Web of conferences 2014-01, Vol.66, p.4030-1-04030-4
Main Authors: Tzeng, Yiharn, Tzeng, S.Y.Tsay
Format: Article
Language:English
Subjects:
Degrees of freedom
Hadrons
Mathematical analysis
Origins
Quarks
Stars
Temperature dependence
Universe
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Summary:The quark degree of freedom may play an important role as one studies dense hadron stars which can help to understand the universe origin. We add a temperature dependence to the effective quark mass adopted from a quark-quark interaction on the QCD basis to probe properties of the star in the quark degree of freedom. Based on this interaction, the quark matter's equation of state is obtained and its thermodynamic characteristics is investigated in detail. Stability of a star made of such matter is examined with and without strange quarks. The Tolman-Oppenheimer-Volkov equation along with the condition that dm/dr = 4[pi]r super(2) E are used to calculate mass and radius of such a star. Exact computations are made to calculate the star's radius and mass at several temperatures. Comparisons of results from these temperatures are made and the significance is carefully investigated and discussed.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20146604030