ILC Workshop on Potential Experiments (ILCX2021)

Dark Matter and Collider Searches at ILC in $S_3$ -Symmetric 2HDM with Vector Like Leptons

27 Oct 2021, 15:30

20m

Room #4 (Zoom Meeting ID: 840 3553 0145)

Oral presentation using Zoom Session H: BSM particle production H-2: BSM particle production

Speaker

Dr Nivedita Ghosh (Harish-Chandra Research Institute)

Description

We study the $S_3$-symmetric two Higgs doublet model by adding two generations of vector like leptons (VLL) which are odd under a discrete $Z_2$-symmetry. The lightest neutral component of the VLL acts as a dark matter (DM) whereas the full VLL set belongs to a dark sector with no mixings allowed with the standard model fermions. We analyse the model in light of dark matter and collider searches. We show that the DM is compatible with the current relic density data as well
as satisfying all direct and indirect dark matter search constraints. We choose some representative points in the model parameter space allowed by all aforementioned dark matter constraints and propose a few collider signatures, namely di-lepton, four-lepton and mono-lepton+2jet along with transverse missing energy that can be easily tested at the International Linear Collider (ILC), in contrast to the LHC machine due to cleaner backgrounds.

Presentation materials

presentation_NG.pdf