Meson effect in the proto neutron star PSR J0348+0432

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The effect of mesons f₀(975) (named as f), ϕ(1020) (named as ϕ) and δ on the moment of inertia of the PNS PSR J0348+0432 is examined in the framework of the relativistic mean field theory considering the baryon octet. It is found that the energy density ε and pressure p will increase considering the mesons δ whereas will decrease as the mesons f and ϕ being considered. When the mesons f, ϕ and δ are considered, the energy density and pressure will all decrease. It is also found that the contribution of mesons f, ϕ and δ to the central energy density is only the central energy density's 0.06 0.6% whereas the contribution of mesons f, ϕ and δ to the central pressure is the central pressure's 4 7%. For the radius, it will decrease when the contributions of mesons f, ϕ and δ are considered. The moment of inertia I will increase considering the mesons δ whereas will decrease as the mesons f and ϕ being considered. When the mesons f, ϕ and δ are all considered, the moment of inertia will decrease. It is found that the contribution of mesons f and ϕ to moment of inertia is 4 9 times larger than that of mesons δ. Our results show that the mesons f, ϕ and δ contribute to the moment of inertia's 2 5%.