Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Hauptvorträge I

HK 15.3: Hauptvortrag

Dienstag, 27. Februar 2018, 12:00–12:30, Audimax

Beta and double-beta decays within an effective theory — •Eduardo Coello Pérez — Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — ExtreMe Matter Institute EMMI, Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany

We have developed an effective theory in terms of collective degrees of freedom to calculate the matrix elements for beta decays from odd-mass nuclei to excited states in spherical even-even nuclei. For the systems in which the effective theory consistently describes the data, we then also calculated the matrix element for the two-neutrino double-beta decay between the corresponding even-even nuclei. The systematic construction of the effective operators within the effective theory allows one to estimate theoretical uncertainties. The calculated two-neutrino double-beta decay matrix elements with associated theoretical uncertainties consistently describe experimental data where available, without the need for additional adjustments.