Constraints of observational mass of neutron stars on the saturation parameters of nuclear matter with SU(6) symmetry
College of Electronic Information and Electrical Engineering, Chengdu University, 610106, Chengdu, China
2 Physics and Space Science College, China West Normal University, 637009, Nanchong, China
3 School of Mathematics and Physics, University of South China, 421001, Hengyang, China
Accepted: 8 January 2021
Published online: 18 January 2021
Since the massive neutron stars (NSs) were detected, NSs have received more extensive attention and research. The discoveries of pulsars PSR J0348-0432 and MSP J07406620 confirm the existence of massive NS and therefore present a strict limit to the equation of state (EoS) of nuclear matter, but the appearance of hyperons will soften the EoS. In order to get a stiff EoS and solve the hyperon puzzle, in this paper we firstly study the effects of the saturation properties of nuclear matter on the mass of NS and then in turn, constrain the saturation properties of nuclear matter by the observed mass of massive NSs with SU(6) symmetry. The study shows that based on the SU(6) symmetry, it is almost impossible to obtain a stiff enough EoS to support the maximum mass of a NS up to 2.0 within the range of empirical value of saturation properties of nuclear matter.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021