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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Structure and Dynamics of Nuclei VII

HK 37.2: Vortrag

Mittwoch, 20. März 2019, 14:30–14:45, HS 16

Weak decays within an effective theory — •Catharina Brase^1,2, Eduardo A. Coello Pérez^1,2, and Achim Schwenk^1,2,3 — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — ³Max-Planck-Institut für Kernphysik, Heidelberg

We explore Gamow-Teller and forbidden β decays within an effective theory. In the effective theory, nuclei are described as spherical cores coupled to a neutron and/or proton, depending on the nucleus of interest. We calculate the matrix elements for β decays into low-lying states of the daughter nucleus and estimate the associated theoretical uncertainty based on the power counting and Bayesian methods. Our results for Gamow-Teller and unique first-forbidden β decays are in good agreement with experiment within the estimated uncertainties.

*This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 279384907 – SFB 1245.