Broken SU(6) symmetry and massive hybrid stars

نویسندگان

چکیده

In this work we revisit the quantum hadrodynamics (QHD) formalism to investigate hyperonic and hybrid stars with hyperon-meson couplings fixed via broken SU(6) group, in favor of a more general flavor group SU(3). We also employ an additional channel, strangeness-hidden ϕ meson, which couples only hyperons. stars, quark phase is built SU(3) NJL model vector channel Lagrangian. found that within models chosen hyperon onset cannot be avoided by quark-hadron transition, once threshold always happens at lower density. Also, contribution core star relevant radius than mass, strongly depends on equation state. are able reproduce 2.21 M⊙ 2.10 star. Both results agreement recently detected hyper massive pulsar MSP J0740+6620.

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ژورنال

عنوان ژورنال: Nuclear Physics

سال: 2021

ISSN: ['1873-1554', '0375-9474']

DOI: https://doi.org/10.1016/j.nuclphysa.2021.122171