Signatures of heavy Majorana neutrinos and HERA's isolated lepton events

Details Signatures of heavy Majorana neutrinos and HERA's isolated lepton events Signatures of heavy Majorana neutrinos and HERA's isolated lepton events

2000-05-26

arxiv.org/abs/hep-ph/0005270v2

Phys.Rev. D62 (2000) 094017

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages with 14 figures, minor changes

Scientific paper

10.1103/PhysRevD.62.094017

The graph of neutrinoless double beta decay is applied to HERA and generalized to final states with any two charged leptons. Considered is the case in which one of the two escapes typical identification criteria and the case when a produced tau decays hadronically. Both possibilities give one isolated lepton with high transverse momentum, hadronic activity and an imbalance in transverse momentum. We examine the kinematical properties of these events and compare them with the high p_T isolated leptons reported by the H1 collaboration. Their positive charged muon events can be explained by the ``double beta'' process and we discuss possibilities for the precise determination which original final state produced the single isolated lepton. To confirm our hypothesis one should search in the data for high pseudorapidity and/or low p_T leptons or for additional separated jets.

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