1996/03/04 by M. Hirsch, H. V. Klapdor‐Kleingrothaus, H. V. Klapdor-Kleingrothaus +1
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.54.r4207
published as Phys.Rev.D54:4207-4210,1996 · LaTeX, 6 pages, 1 figure
arxiv created 1996/03/04 · openalex publication_date 1996/10/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
A new mechanism for neutrinoless double \ensuremathβ(0\ensuremathν\ensuremathβ\ensuremathβ) decay based on leptoquark exchange is discussed. Because of the specific helicity structure of the effective four-fermion interaction this contribution is strongly enhanced compared to the well-known mass mechanism of 0\ensuremathν\ensuremathβ\ensuremathβ decay. As a result the corresponding leptoquark parameters are severely constrained from nonobservation of 0\ensuremathν\ensuremathβ\ensuremathβ decay. These constraints are more stringent than those derived from other experiments.