23–26 Sept 2025
Yerevan, Armenia
Etc/GMT+4 timezone

The impact of non-zero quark masses on the Equation of State and the Maximum Mass of Strange Quark Stars

26 Sept 2025, 16:00
30m
Yerevan, Armenia

Yerevan, Armenia

Department of Physics, Alex Manukyan str. 1, Yerevan, Armenia

Speaker

Dr Hasmik Shahinyan (Yerevan State University)

Description

This study explores the equations of state for strange quark matter as a superdense ground state within the MIT bag model, considering both fixed and baryon density–dependent parameters. We examine the structure of cold, self-bound strange stars capable of reaching masses above two solar masses, forming a continuous family with neutron stars along the mass–central density (M(ρ_c)) relation. The primary aim is to compare these theoretical mass predictions with recent precise pulsar mass measurements. By solving the Tolman–Oppenheimer–Volkoff equations numerically, we evaluate two scenarios: (1) fixed bag model parameters m_s,α_c,B; (2) fixed m_s,α_c with B=B(n_B). In this discussion, we address the solutions to the equations of state and subsequently examine the relativistic equations governing compact stars, incorporating the non-zero masses of first-generation quarks. Using numerical calculations based on their experimentally determined values with specified accuracy, we analyze the resulting relationships between these parameters and the various physical quantities.

Author

Dr Hasmik Shahinyan (Yerevan State University)

Co-authors

Dr TIgran Sargsyan (Synopsys Armenia) Dr Arsen Babajanyan (Yerevan State University)

Presentation materials