Proving the CEP with compact stars?
| Autor: | David Edwin Alvarez-Castillo, Blaschke, D. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | INSPIRE-HEP |
| DOI: | 10.48550/arxiv.1304.7758 |
| Popis: | We present a model for hybrid compact stars composed of a quark core and a hadronic mantle with an abrupt first order phase transition at the interface and in accordance with the latest astrophysical measurements of two 2 M_sun pulsars. We demonstrate the possibility of a disconnected mass-radius sequence (third family) of high-mass pulsars as a distinct feature due to a large jump $\Delta \epsilon$ in the energy density of the first order phase transition setting in at $\epsilon_{\rm crit}\approx 500$ MeV/fm$^3$ and fulfilling $\Delta \epsilon/\epsilon_{\rm crit} > 0.6$. We conclude that the measurement of so called \textit{twin} compact stars at high mass (~ 2 M_sun) would support the existence of a first order phase transition in symmetric matter at zero temperature entailing the existence of a critical end point (CEP) in the QCD phase diagram. Comment: 4 pages, 2 figures, Proceedings of the 17th Conference of Young Scientists and Specialists, Dubna, April 8-12, 2013 |
| Databáze: | OpenAIRE |
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