Ponente
Descripción
Based on recent experimental and theoretical hints on possible formation of a resonant four-neutron system we study effects of appearance of such an aggregates in neutron rich baryon matter inside neutron stars. For this purpose we employ a relativistic mean field approach which includes nucleons, Δ-isobars as well as light nuclear clusters. Our analysis demonstrates that tetraneutrons existing as the Bose-Einstein condensate can appear even despite their short lifetime and strong effects of the Pauli blocking. This significantly affects the equation of state of cold baryonic matter and observable characteristics of neutrons stars. Tetraneutron driven suppression of Δ-baryons is another important result of our study. The most prominent manifestation of the tetraneutron condensation in neutron stars is related to suppression of the superconducting phase which can be concluded from analysis of the nucleon-nucleon pairing gap and density of pairs.
