Interplay of inert doublet and vector-like lepton triplet with displaced vertices at the LHC/FCC and MATHUSLA

10 Jun 2024, 17:35
25m
Sala Azul

Sala Azul

Parallel Talk Higgs: theory and experiment Higgs: theory and experiment

Speaker

Priyotosh Bandyopadhyay

Description

We study the interaction between the inert Higgs doublet (IDM) dark matter and a vector-like SU(2) triplet lepton (VLL), both of which are Z2-odd. The vector current of the VLL with the Z-boson rules out a fermionic or two-component dark matter scenario. However, a compressed mass spectrum and a sufficiently small Yukawa coupling allows co-annihilation and late decay of the VLL into the IDM sector, affecting the relic density of the pseudoscalar darkmatter. The same two factors enable displaced decay of the VLL states, providing novel signatures involving hadronically quiet displaced multi-lepton final states. Such signatures to probe the model are studied at the 14 and 27 TeV LHC, as well as the 100 TeV FCC-hh. In addition to being detectable at the CMS/ATLAS experiments, if the new particles have sub-100 GeV masses,
signals can also be seen at the proposed MATHUSLA detector

Author

Priyotosh Bandyopadhyay

Co-authors

CHANDRIMA SEN Dr Mariana Frank (University of Cconcordia) Snehashis Parashar (IIT Hyderabad)

Presentation materials