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21 papers · 1 filter
Single- and double-beta decay Fermi-transitions in an exactly solvable model
Jorge G. Hirsch, Peter O. Hess, Osvaldo Civitarese
An exactly solvable model suitable for the description of single and double-beta decay processes of the Fermi-type is introduced. The model is equivalent to the exact shell-model t…
On the Weyl-Wigner-Moyal Description of SU Nahm Equations
Hugo Garcia-Compean, Jerzy F. Plebanski
We show how the reduced Self-dual Yang-Mills theory described by the Nahm equations can be carried over to the Weyl-Wigner-Moyal formalism employed recently in Self-dual gravity. E…
Model independent analysis of the simultaneous mixing of gauge bosons and mixing of fermions
Umberto Cotti, Arnulfo Zepeda
We discuss the case of simultaneous mixing of gauge bosons and mixing of fermions in a model independent way and for a variety of extra-fermion representations. In this context we…
Quasi-Asimptotically Flat Spacetimes and Their ADM Mass
Ulises Nucamendi, Daniel Sudarsky
We define spacetimes that are asymptotically flat, except for a deficit solid angle , and present a definition of their ``ADM'' mass, which is finite for this class of spacetime…
Double beta decay and the proton-neutron residual interaction
Jorge G. Hirsch, Peter O. Hess, Osvaldo Civitarese
The validity of the pn-QRPA and -RQRPA descriptions of double beta decay transition amplitudes is analyzed by using an exactly solvable model. It is shown that the collapse of the…
Stationary Dilatons with Arbitrary Electromagnetic Field
Tonatiuh Matos, Cesar Mora
We present two new classes of axisymmetric stationary solutions of the Einstein-Maxwell-Dilaton equations with coupling constant . Both classes are written in terms of two h…