Mass-radius constraints for the neutron star EoS - Bayesian analysis

15th International Conference on Strangeness in Quark Matter

Ayriyan, A.^1 ; Alvarez-Castillo, D.E.^2,3 ; Blaschke, D.^3,4,5 ; Grigorian, H.^1,6

Laboratory for Information Technologies, JINR Dubna, Dubna

141980, Russia^1

Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, Dubna

141980, Russia^2

Universidad Autó Noma de San Luis Potosí

, S.L.P., Mexico

78290, Mexico^3

Institute of Theoretical Physics, University of Wroclaw, Wroclaw

50-204, Poland^4

National Research Nuclear University (MEPhI), Moscow

115409, Russia^5

Department of Physics, Yerevan State University, Yerevan, Armenia^6

关键词: Bayesian Analysis;    Critical end-point;    First order transitions;    First-order phase transitions;    Heavy ion collision;    Probability measures;    Qcd phase diagrams;    Radius measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012038/pdf
DOI  :  10.1088/1742-6596/668/1/012038

来源: IOP

【 摘 要 】

We suggest a new Bayesian analysis (BA) using disjunct M-R constraints for extracting probability measures for cold, dense matter equations of state (EoS). One of the key issues of such an analysis is the question of a deconfinement transition in compact stars and whether it proceeds as a crossover or rather as a first order transition. We show by postulating results of not yet existing radius measurements for the known pulsars with a mass of 2Mq that a radius gap of about 3 km would clearly select an EoS with a strong first order phase transition as the most probably one. This would support the existence of a critical endpoint in the QCD phase diagram under scrutiny in present and upcoming heavy-ion collision experiments.