Effects of a weakly interacting light U boson on the nuclear equation of state and properties of neutron stars in relativistic models

Abstract

We investigate the effects of the light vector U-boson that couples weakly to nucleons in relativistic mean-field models on the equation of state and subsequently the consequence in neutron stars. It is analyzed that the U-boson can lead to a much clearer rise of the neutron star maximum mass in models with the much softer equation of state. The inclusion of the U-boson may thus allow the existence of the non-nucleonic degrees of freedom in the interior of large mass neutron stars initiated with the favorably soft EOS of normal nuclear matter. In addition, the sensitive role of the U-boson in the neutron star radius and its relation to the test of the non-Newtonian gravity that is herein addressed by the light U-boson are discussed.

8 pages,7 figures

References in corpus (13)

• Shapiro delay measurement of a two solar mass neutron star
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Neutron-Rich Nuclei in Heaven and Earth
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
• Measuring Neutron Star Mass and Radius with Three Mass-Radius Relations
• Equation of state of isospin-asymmetric nuclear matter in relativistic mean-field models with chiral limits
• Isospin dependent properties of asymmetric nuclear matter
• Charge density of light exotic nuclei and $\rho NN$ tensor coupling
• U-boson at BESIII
• Neutron-skin thickness of finite nuclei in relativistic mean-field models with chiral limits

Cited by in corpus (13)

• Single-nucleon potential decomposition of the nuclear symmetry energy
• Extended Skyrme interactions for nuclear matter, finite nuclei and neutron stars
• Neutron Stars with Baryon Number Violation, Probing Dark Sectors
• Effects of nuclear symmetry energy on eta meson production and its rare decay to the dark U-boson in heavy-ion reactions
• Constraints from compact star observations on non-Newtonian gravity in strange stars based on a density dependent quark mass model
• Nuclear constraints on non-Newtonian gravity at femtometer scale
• Effects of the U-boson on the inner edge of neutron star crusts
• Small radii of neutron stars as an indication of novel in-medium effects
• Equation of state and hybrid star properties with the weakly interacting light U-boson in relativistic models
• Probing into the Possible Range of the U Bosonic Coupling Constants in Neutron Stars Containing Hyperons
• Rearrangements of interacting Fermi liquids
• Influence of the weakly interacting light U boson on the properties of massive PNS
• Non-Newtonian gravity in finite nuclei