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PSR J1614-2230 May Include Hyperons

In the framework of the relativistic mean field theory, it is found that recently discovered PSR J1614-2230 with mass of 1.97±0.04M⊙ may include hyperons when the weakly interacting light boson (WILB) is considered. To describe PSR J1614-2230 with the equation of state (EOS) including hyperons, the characteristic scale of the WILB (g2/μ2) should lie in the range of 13–46 (24–46) GeV−2 with the weak (strong) hyperon-hyperon (YY) interaction. The measurements of inertial momentum and the total neutrino luminosity of the neutron star could be used to further constrain the characteristic scale of the WILB. Before more stringent constraint on the WILB is given, the mass measurement of the neutron star could not exclude any soft EOS.