Quantum Monte Carlo calculation of $\delta_{NS}$ in $^{10}$C using an effective field theory approach

G. B. King, J. Carlson, A. R. Flores, S. Gandolfi, E. Mereghetti, S. Pastore, M. Piarulli, R. B. Wiringa

Phys. Rev. C 114, 015501 (2026)
[arXiv:2509.07310]

We compute radiative corrections to the superallowed \(\beta\) decay of \(^{10}\)C in an effective field theory approach using nuclear matrix elements obtained from quantum Monte Carlo calculations. These corrections are an important ingredient in the extraction of the Cabibbo-Kobayashi-Masakawa quark mixing matrix element \(V_{ud}\), and the role of this work is to illuminate the uncertainties arising from nuclear structure. Our results provide good agreement with both the traditional extraction of \(V_{ud}\), as well as with a more recent evaluation performed using the no-core shell model and a dispersion formalism. The dominant uncertainty in this approach is the presence of two unknown low-energy constants that enter into the relevant nuclear matrix elements. Future determinations of these low-energy constants -- either from QCD or modeling them with two nucleon amplitudes -- would improve the precision of the extraction in this formalism.

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