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Coupled-cluster calculations of neutrinoless double-beta decay in $^{48}$Ca

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arxiv 2008.09696 v3 pith:N3R3UMGY submitted 2020-08-21 nucl-th

classification nucl-th
keywords decaydouble-betaelementmatrixnuclearcomputecoupled-clusterneutrinoless
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We use coupled-cluster theory and nuclear interactions from chiral effective field theory to compute the nuclear matrix element for the neutrinoless double-beta decay of $^{48}$Ca. Benchmarks with the no-core shell model in several light nuclei inform us about the accuracy of our approach. For $^{48}$Ca we find a relatively small matrix element. We also compute the nuclear matrix element for the two-neutrino double-beta decay of $^{48}$Ca with a quenching factor deduced from two-body currents in recent ab-initio calculation of the Ikeda sum-rule in $^{48}$Ca [Gysbers et al., Nature Physics 15, 428-431 (2019)].

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  1. Benchmarking nuclear matrix elements of $0\nu\beta\beta$ decay with high-energy nuclear collisions

    nucl-th 2025-02 conditional novelty 6.0 of 10

    Simulations show that flow observables in ultra-central 150Nd+150Nd collisions have Pearson correlations up to |r|=0.93 with the 0νββ nuclear matrix element, proposing collider data as a benchmark for nuclear theory.

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