Vacuum stability of the type II seesaw leptogenesis from inflation

Han, Chengcheng; Huang, Shuqi; Lei, Zhanhong

doi:10.1103/physrevd.107.015021

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“…One can define the mass-splitting parameter which describes the typical mass difference of the spectra for the triplet Higgs sector. The decay behavior of the triplet Higgs is different from different parameter spaces [20,30,31,36]. For GeV and GeV, the decays into .…”

Section: Type II Seesaw Modelmentioning

confidence: 99%

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Testing type II seesaw leptogenesis at the LHC*

2023

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The type II seesaw leptogenesis simultaneously explains the origin of neutrino masses, the baryon asymmetry of our universe, and the inflation. The large hadron collider(LHC) provides an opportunity to directly test the type II seesaw leptogenesis by looking for the predicted triplet Higgs. In this paper, we perform an analysis of the detection prospect for the triplet Higgs at the LHC through the multi-electron channels. We find that due to the contribution of $pp\to H^{\pm \pm }H^{\mp }$ process, the sensitivity of multi-electron channels searching for the doubly-charged Higgs pair production can be improved. We also investigate the $3l+ {E}^{\rm miss}_{\rm T}$ signals to probe the $pp\to H^{\pm \pm }H^{\mp }$ production and find that the future high luminosity LHC could probe a triplet Higgs around 1.2 TeV at $2\sigma$ level. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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Section: Type II Seesaw Modelmentioning

confidence: 99%

“…The decay modes of triplet Higgs with different parameters have been thoroughly discussed in Refs. [20,30,31,36]. We consider GeV and GeV, and thus the doubly-charged Higgs and singly-charged scalars mostly decay to leptonic final states.…”

Section: Production and Decay Of The Triplet Higgsmentioning

confidence: 99%