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Quark Coulomb Interactions and the Mass Difference of Mirror Nuclei

C. J. Horowitz·J. Piekarewicz
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Abstract

We study the Okamoto-Nolen-Schiffer (ONS) anomaly in the binding energy of mirror nuclei at high density by adding a single neutron or proton to a quark gluon plasma. In this high-density limit we find an anomaly equal to two-thirds of the Coulomb exchange energy of a proton. This effect is dominated by quark electromagnetic interactions---rather than by the up-down quark mass difference. At normal density we calculate the Coulomb energy of neutron matter using a string-flip quark model. We find a nonzero Coulomb energy because of the neutron's charged constituents. This effect could make a significant contribution to the ONS anomaly.

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C. J. Horowitz, J. Piekarewicz. 2000-02-01. Quark Coulomb Interactions and the Mass Difference of Mirror Nuclei. https://doi.org/10.1103/physrevc.63.011303

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