nucl-th digest · Apr 12, 2019

Signatures for quark matter from multi-messenger observations

We review the prospects for detecting quark matter in neutron star cores. We survey the proposed signatures and emphasize the importance of data from neutron star mergers, which provide access to dynamical properties that operate on short timescales that are not probed by other neutron star observables.

Comments:: 23 pages, 4 figures; refs. added, accepted for publication
Subjects:: Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR)
arXiv:: 1904.05471 [pdf]

J.Phys.G(2019)·83 citations

[Submitted on 11 Apr 2019]

Three-Body Hypernuclei in Pionless Effective Field Theory

F. Hildenbrand🇩🇪 · H.-W. Hammer🇩🇪

We calculate the structure of three-body hypernuclei with $S = - 1$ using pionless effective field theory at leading order in the isospin $I = 0$ and $I = 1$ sectors. In both sectors, three-body hypernuclei arise naturally from the Efimov effect and a three-body parameter is required at leading order. We apply our theory to the hypertriton and the hypothetical $Λ nn$ bound state and calculate the corresponding scaling factors. Moreover, we discuss constraints on the existence of the $Λ nn$ bound state. In particular, we elucidate universal correlations between different observables and provide explicit calculations of wave functions and matter radii.

Comments:: 26 pages, 13 figures, typos corrected, discussion of parameter space for Lambda_* extended, error in Figs. 5-7 and Lambda-d scattering length corrected, final version
Subjects:: Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:: 1904.05818 [pdf]

PRC(2019)·59 citations

Friday·April 12, 2019

Signatures for quark matter from multi-messenger observations

Three-Body Hypernuclei in Pionless Effective Field Theory

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