Bounds on new Majoron models from the Heidelberg-Moscow-Experiment

Details Bounds on new Majoron models from the Heidelberg-Moscow-Experiment Bounds on new Majoron models from the Heidelberg-Moscow-Experiment

1995-11-03

arxiv.org/abs/nucl-ex/9511001v1

Phys.Rev.D54:3641-3644,1996

Physics

Nuclear Physics

Nuclear Experiment

8 pages, postscript encoded as uu-file

Scientific paper

10.1103/PhysRevD.54.3641

In recent years several new Majoron models were invented to avoid shortcomings of the classical models while leading to observable decay rates in double beta experiments. We give the first experimental half life bounds on double beta decays with new Majoron emission and derive bounds on the effective neutrino--Majoron couplings from the data of the $^{76}Ge$ HEIDELBERG--MOSCOW experiment. While stringent half life limits for all decay modes and the coupling constants of the classical models were obtained, small matrix elements and phase space integrals \cite{hir95,pae95} result in much weaker limits on the effective coupling constants of the new Majoron models.

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