Tetraneutron condensation in Neutron Stars. (arXiv:1904.11512v1 [nucl-th])
<a href="http://arxiv.org/find/nucl-th/1/au:+Ivanytskyi_O/0/1/0/all/0/1">O. Ivanytskyi</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Perez_Garcia_M/0/1/0/all/0/1">M. Ángeles Pérez-García</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Albertus_C/0/1/0/all/0/1">C. Albertus</a>
In this work we investigate the possible condensation of tetraneutron
resonant states in the interior of Neutron Stars (NSs). Using an effective
field theoretical approach we solve the set of relativistic self-consistent
(mean field) equations to characterize the system containing different hadronic
species including, besides tetraneutrons, nucleons, $Delta$-isobars and a set
of light clusters ($^3$He, $alpha$ particles, deuterium and tritium).
$sigma,omega$ and $rho$ mesonic fields provide the interaction. Scanning the
yet uncertain range of the coupling strengths of the tetraneutron states to the
mesonic fields considered we study how their presence could significantly
impact the properties of NS matter. We find that for weak coupling strengths of
tetraneutrons to the $sigma$ field tetraneutrons may appear over a range of
densities belonging to the NS crust while for higher strengths they can be
found in the core. In this latter case a non negligible suppression of both the
$Delta$-isobar fraction and superfluid phases of paired nucleons would arise
as a manifestation of the tetraneutron condensate. We discuss further
implications of such findings.
In this work we investigate the possible condensation of tetraneutron
resonant states in the interior of Neutron Stars (NSs). Using an effective
field theoretical approach we solve the set of relativistic self-consistent
(mean field) equations to characterize the system containing different hadronic
species including, besides tetraneutrons, nucleons, $Delta$-isobars and a set
of light clusters ($^3$He, $alpha$ particles, deuterium and tritium).
$sigma,omega$ and $rho$ mesonic fields provide the interaction. Scanning the
yet uncertain range of the coupling strengths of the tetraneutron states to the
mesonic fields considered we study how their presence could significantly
impact the properties of NS matter. We find that for weak coupling strengths of
tetraneutrons to the $sigma$ field tetraneutrons may appear over a range of
densities belonging to the NS crust while for higher strengths they can be
found in the core. In this latter case a non negligible suppression of both the
$Delta$-isobar fraction and superfluid phases of paired nucleons would arise
as a manifestation of the tetraneutron condensate. We discuss further
implications of such findings.
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