Amand Faessler

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V. A. Rodin, Amand Faessler, F. Šimkovic, and Petr Vogel Institute für Theoretische Physik der Universität Tübingen, D-72076 Tübingen, Germany Department of Nuclear Physics, Comenius University, Bratislava, Slovakia Department of Physics 106-38, California Institute of Technology, Pasadena, California 91125, USA Institute of Particle and Nuclear Physics,(More)
Within the quasiparticle random-phase approximation (QRPA) we achieve partial restoration of the isospin symmetry and hence fulfillment of the requirement that the 2νββ Fermi matrix element M F vanishes, as it should, unlike in the previous version of the method. This is accomplished by separating the renormalization parameter gpp of the particle-particle(More)
Fedor Šimkovic,1,* Amand Faessler,1 Vadim Rodin,1 Petr Vogel,2 and Jonathan Engel3 1Institute für Theoretische Physik der Universität Tübingen, D-72076 Tübingen, Germany 2Kellogg Radiation Laboratory and Physics Department, Caltech, Pasadena, California 91125, USA 3Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North(More)
The measured occupancies of valence orbits in 76Ge and 76Se are used as a guideline for modification of the effective mean field energies that results in better description of these quantities. With them, in combination with the self-consistent renormalized quasiparticle random phase approximation (SRQRPA) method that ensures conservation of the mean(More)
During the last decade, the problem of the description of hadrons in dense and hot nuclear matter received great attention. The purpose of the current investigations is to determine experimentally mass shifts and the broadening of hadronic resonances at finite density and temperature. The dilepton spectra from heavy-ion collisions are a suitable tool for(More)
The neutrinoless double beta decay (0νββ-decay) transition to the first excited 0+ collective final state is examined for A=76, 82, 100 and 136 nuclei by assuming light and heavy Majorana neutrino exchange mechanisms as well as the trilinear R-parity violating contributions. Realistic calculations of nuclear matrix elements have been performed within the(More)
We discuss some phenomenological issues of the effective quarklepton operators emerging from the bilinear lepton-Higgs couplings in the superpotential and in the soft supersymmetry (SUSY) breaking sector of the supersymmetric models without R-parity. The contribution of these operators to the neutrinoless double beta decay (0νββ) is derived. The(More)
We examine the pion realization of the short ranged supersymmetric (SUSY) mechanism of neutrinoless double beta decay (0νββ-decay). It originates from the R-parity violating quark-lepton interactions of the SUSY extensions of the standard model of the electroweak interactions. We argue that pions are dominant SUSY mediators in 0νββdecay. The corresponding(More)
Amand Faessler1, Dong-Liang Fang1, Vadim Rodin1, and Fedor Šimkovic2,3 1Institut für Theoretische Physik der Universität Tübingen, D-72067 Tübingen, Germany; 2Department of Nuclear Physics, Comenius University, SK-842 15 Bratislava, Slovakia; 3BLTP, JINR, 141980 Dubna, Russia Neutrinoless double beta decay (0 -decay) is a second order nuclear weak decay(More)