Single-particle spectra of Λ hypernuclei and the enhanced interaction radii of multi-strange objects

Application of the density dependent hadron field theory to neutron star matter

“…The scalar coupling constants are fitted to hypernuclear properties [14][15][16] and chosen to give hyperon potentials in saturated nuclear matter that are compatible with experimental results for the single particle spectra of hypernuclei.…”

“…RMF theory [12,13] allows to incorporate easily and consistently an enlarged set of hadronic degrees of freedom and has been succesfully applied to hypernuclei [14][15][16][17] and neutron stars [2,4,5]. Being a phenomenological model with its parameters usually adjusted to the properties of finite nuclei and their limited density range around ρ 0 , an extrapolation to higher densities has some uncertainties.…”

Λc+andΛbhypernuclei

“…, are a new, and characteristic feature of QMC beyond QHD [22,23,24]. The effective mass for the charmed or bottom baryon C is defined by,…”

Effective field theory forΛ−Σ0mixing in nuclear matter

“…Microscopic meson-exchange models have been constructed which accurately reproduce the rich nucleon-nucleon and the more scarce hyperon-nucleon data [2,3]. Binding energies and single particle spectra of single hypernuclei are described in nonrelativistic [4] and relativistic [5] mean-field models. The relativistic models usually involve the baryon octet and several strange [6][7][8] and nonstrange mesons.…”

“…However, it is unnatural for some interaction terms to vanish without a relevant symmetry argument [19]. From this modern point of view most relativistic mean-field models which have been employed to describe strange nuclear systems (for instance [5,6,10,20]) are incomplete because only a very restricted subset of the allowed interaction terms are considered.…”