Holographic QCD in the NICER era

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http://hdl.handle.net/10138/345739

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Jokela , N , Järvinen , M & Remes , J 2022 , ' Holographic QCD in the NICER era ' , Physical Review D , vol. 105 , no. 8 , 086005 . https://doi.org/10.1103/PhysRevD.105.086005

Title: Holographic QCD in the NICER era
Author: Jokela, Niko; Järvinen, Matti; Remes, Jere
Contributor organization: Helsinki Institute of Physics
Date: 2022-04-08
Language: eng
Number of pages: 12
Belongs to series: Physical Review D
ISSN: 2470-0010
DOI: https://doi.org/10.1103/PhysRevD.105.086005
URI: http://hdl.handle.net/10138/345739
Abstract: We analyze families of hybrid equations of state of cold QCD matter, which combine input from gaugegravity duality and from various ab initio methods for nuclear matter at low density, and predict that all neutron stars are fully hadronic without quark matter cores. We focus on constraints from recent measurements by the NICER telescope on the radius and mass of the millisecond pulsar PSR J0740 + 6620. These results are found to be consistent with our approach: they set only mild constraints on the hybrid equations of state and favor the most natural models which are relatively stiff at low density. Adding an upper bound on the maximal mass of neutron stars, as suggested by the analysis of the GW170817 neutron star merger event, tightens the constraints considerably. We discuss updated predictions on observables such as the transition density and latent heat of the nuclear to quark matter transition as well as the masses, radii, and tidal deformabilities of neutron stars.
Subject: 114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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