%0 Journal Article
%T Delta L >= 4 lepton number violating processes
%A Fonseca, R. M.
%A Hirsch, M.
%J Physical Review D
%D 2018
%V 98
%N 1
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Fonseca+Hirsch2018
%O WOS:000439791500005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3675), last updated on Thu, 09 Aug 2018 00:17:13 +0000
%X We discuss the experimental prospects for observing processes which violate lepton number (Delta L) in four units ( or more). First, we reconsider neutrinoless quadruple beta decay, deriving a model independent and very conservative lower limit on its half- life of the order of 10(41) ys for Nd-150. This renders quadruple beta decay unobservable for any feasible experiment. We then turn to a more general discussion of different possible low-energy processes with values Delta L >= 4. A simple operator analysis leads to rather pessimistic conclusions about the observability at low-energy experiments in all cases we study. However, the situation looks much brighter for accelerator experiments. For two example models with Delta L = 4 and another one with Delta L = 5, we show how the LHC or a hypothetical future pp collider, such as the FCC, could probe multilepton number violating operators at the TeV scale.
%R 10.1103/PhysRevD.98.015035
%U http://arxiv.org/abs/1804.10545
%U https://doi.org/10.1103/PhysRevD.98.015035
%P 015035-12pp