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Short-range mechanisms of neutrinoless double beta decay at the LHC

AutorHelo, Juan Carlos; Kovalenko, S. G.; Hirsch, Martin ; Päs, Heinrich
Palabras claveLepton number
Majorana neutrinos
Fecha de publicación25-oct-2013
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 88 (7): 073011 - 19 (2013)
ResumenLepton number violation (LNV) mediated by short- range operators can manifest itself in both neutrinoless double beta decay (0 nu beta beta) and in processes with same- sign dilepton final states at the LHC. We derive limits from existing LHC data at root s = 8 TeV and compare the discovery potential of the forthcoming root s = 14 TeV phase of the LHC with the sensitivity of current and future 0 nu beta beta decay experiments, assuming the short-range part of the 0 nu beta beta decay amplitude dominates. We focus on the first of two possible topologies triggered by one fermion and two bosons in the intermediate state. In all cases, except for the pure leptoquark mechanism, the LHC will be more sensitive than 0 nu beta beta decay in the future. In addition, we propose to search for a charge asymmetry in the final state leptons and to use different invariant mass peaks as a possible tool to discriminate the various possible mechanisms for LNV signals at the LHC.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.88.073011
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