Bounds on Compositeness from Neutrinoless Double Beta Decay

Abstract

Assuming the existence of a heavy Majorana neutral particle arising from a composite model scenario we discuss the constraints imposed by present experimental limits of half-life neutrinoless double beta decay $(0\nu \beta \beta )$ measurements on the coupling of the heavy composite neutrinos to the gauge bosons. For neutrino masses $M_N=1$ TeV we obtain a rather weak lower bound on the compositeness scale: $\Lambda \ge 0.23$ TeV.

Comments: Plain Latex file, 15 pages; 3 figures appended as a uuencoded file; misprint corrected in titlepage