Adding delta isobars with adjustable meson couplings can shift their appearance density below lambda hyperons and change the predicted radius of a 1.4 solar mass neutron star by up to about 1.7 km.
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Exploring the impact of $\Delta$-isobars on Neutron Star
Adding delta isobars with adjustable meson couplings can shift their appearance density below lambda hyperons and change the predicted radius of a 1.4 solar mass neutron star by up to about 1.7 km.