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Existence of hyperons in the pulsar PSRJ1614-2230

The possibility of existence of hyperons in the recently measured $2M_\odot$ pulsar PSRJ1614-2230 is explored using a diverse set of nuclear equations of state calculated within the relativistic mean-field models. Our results indicate that the nuclear equations of state compatible with heavy-ion data allow the hyperons to exist in the PSRJ1614-2230 only for significantly larger values for the meson-hyperon coupling strengths. The maximum mass configurations for these cases contain sizable hyperon fractions ($\sim 60%$) and yet masquared their counterpart composed of only nucleonic matter.

preprint2012arXivOpen access
A. SulaksonoB. K. Agrawal
astro-ph.HEnucl-th
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A. SulaksonoB. K. Agrawal

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