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arXiv · 1309.6888

Search for a doubly-charged boson in four lepton final states in type II seesaw

Eung Jin Chun·Pankaj Sharma
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Abstract

CMS and ATLAS have searched for a doubly-charged boson $H^{\pm\pm}$ which may arise from type II seesaw in the 7 TeV run at the LHC by considering pair or associated production of doubly-charged bosons under the assumption of degenerate triplet scalars. In this work, we consider non-degenerate triplet components with the mass gap $ΔM \sim 1 - 40$ GeV which leads to enhanced pair-production cross-sections of $H^{\pm\pm}$ added by the gauge decays of the heavier neutral and singly-charged bosons. We reevaluate the constraints in the $ΔM-M_{H^{++}}$ plane depending on the triplet vacuum expectation value $v_Δ$ in the type II seesaw model which are much more stringent than the current search limits. We further study the possibility of observing same-sign tetra-lepton signals in the allowed parameter space which can be probed in the future runs of the LHC.

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Eung Jin Chun, Pankaj Sharma. 2013-09-26. Search for a doubly-charged boson in four lepton final states in type II seesaw. https://doi.org/10.1016/j.physletb.2013.11.056

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