12–15 Dec 2022
CERN
Europe/Paris timezone

A Novel Experimental Search Channel for Very Light Higgses in the 2HDM Type I

15 Dec 2022, 10:00
15m
4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

110
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Speaker

Souad Semlali (School of Physics and Astronomy, University of Southampton)

Description

We present a reinterpretation study of existing results from the CMS Collaboration, specifically, searches for light Beyond the Standard Model (BSM) Higgs pairs produced in the chain decay $pp\to H_{\rm SM}\to hh(aa)$ into a variety of final states, in the context of the CP-conserving 2-Higgs Doublet Model (2HDM) Type-I. Through this, we test the LHC sensitivity to a possible new signature, $pp\to H_{\rm SM}\to ZA\to ZZ h$, with $ZZ\to jj \mu^+\mu^-$ and $h\to b\bar b$. We investigate the significance of a potentially visible signal through a full Monte Carlo simulation down to the {parametrised} detector level and show that it is an alternative promising channel to standard four-body searches for light BSM Higgses at the LHC already with an integrated luminosity of ${\cal L} = 300~{\rm fb}^{-1}$. For a tenfold increase of the latter, discovery should be possible over most of the allowed parameter space.

Authors

Prof. Claire Shepherd-Themistocleous (Particle Physics Department, Rutherford Appleton Laboratory) Souad Semlali (School of Physics and Astronomy, University of Southampton) Prof. Stefano Moretti (School of Physics and Astronomy, University of Southampton)

Presentation materials