TY  - JOUR
AU  - Fonseca, R. M.
AU  - Hirsch, M.
PY  - 2018
DA  - 2018//
TI  - Delta L >= 4 lepton number violating processes
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 015035
EP  - 12pp
VL  - 98
IS  - 1
PB  - Amer Physical Soc
AB  - 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.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1804.10545
UR  - https://doi.org/10.1103/PhysRevD.98.015035
DO  - 10.1103/PhysRevD.98.015035
LA  - English
N1  - WOS:000439791500005
ID  - Fonseca+Hirsch2018
ER  -