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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei IV
HK 18.2: Vortrag
Dienstag, 31. März 2020, 17:30–17:45, J-HS H
Weak decays within an effective theory — •Catharina Brase1,2, Eduardo A. Coello Peréz3, Javier Menéndez4, and Achim Schwenk1,2,5 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Lawrence Livermore National Laboratory, Livermore, CA — 4Department of Quantum Physics and Astrophysics, University of Barcelona — 5Max-Planck-Institut für Kernphysik, Heidelberg
We study Gamow-Teller and unique forbidden β decays within an effective theory. In this approach nuclei are described as spherical cores coupled to a neutron and/or proton, depending on the nuclei of interest. We calculate matrix elements for β decays into low-lying states of the daughter nucleus, explore their applications and investigate the associated theoretical uncertainty based on a power counting and Bayesian methods. Our effective theory results are found to be in good agreement with experiment within theoretical uncertainties.
*This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 279384907 – SFB 1245.