Abstract We study the thermodynamic properties of asymmetric quark matter and large mass stars within confined-isospin-density-dependent-quark-mass model. find that symmetry energy should be very in order to describe recent discovered heavy compact PSR J0348+0432 ( $$\text {2.01}\pm \text {0.04}M_{\odot }$$ 2.01</mm...

We propose a string theory construction which allows us to study properties of the potential two heavy quarks coupled light quark. In such case, is function separation between quarks. The results show universality tension and factorization at small separations expected from quark-diquark symmetry. addition, we make an estimate breaking distance. With parameter values use, this distance found be...

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