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Superallowed nuclear beta decays and precision tests of the Standard Model

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arxiv 2311.00044 v3 pith:HRAY7EIW submitted 2023-10-31 nucl-th hep-phnucl-ex

classification nucl-thhep-phnucl-ex
keywords nuclearprecisionbetadatadecaysdevelopmentsexperimentalmany
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

For many decades, the main source of information on the top-left corner element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix $V_{ud}$ were superallowed nuclear beta decays with an impressive 0.01\% precision. This precision, apart from experimental data, relies on theoretical calculations in which nuclear structure-dependent effects and uncertainties play a prime role. This review is dedicated to a thorough reassessment of all ingredients that enter the extraction of the value of $V_{ud}$ from experimental data. We tried to keep balance between historical retrospect and new developments, many of which occurred in just five past years. They have not yet been reviewed in a complete manner, not least because new results are a-coming. This review aims at filling this gap and offers an in-depth yet accessible summary of all recent developments.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A possible solution to the gallium anomaly moving beyond the leptonic wave function factorization

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A non-factorized amplitude treatment with a fitted sign-changing nuclear transition density reduces the predicted νe-71Ga capture rate by ~20%, absorbing the gallium anomaly without new physics.

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

    nucl-th 2025-09 conditional novelty 6.0 of 10

    The first quantum Monte Carlo evaluation of the nuclear-structure-dependent radiative correction in carbon-10 confirms the NCSM dispersion result, with the residual uncertainty set by two undetermined low-energy constants.

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