https://doi.org/10.1140/epjc/s10052-024-12574-3
Regular Article - Theoretical Physics
A novel experimental search channel for very light higgs bosons in the 2HDM type I
1
School of Physics and Astronomy, University of Southampton, SO17 1BJ, Southampton, UK
2
Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
3
Particle Physics Department, Rutherford Appleton Laboratory, OX11 0QX, Chilton, Didcot, Oxon, UK
Received:
13
October
2023
Accepted:
18
February
2024
Published online:
8
March
2024
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 
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 Large Hadron Collider (LHC) sensitivity to a possible new signature, 
, with 
and 
. We perform a systematic scan over the 2HDM Type-I parameter space, by taking into account all available theoretical and experimental constraints, in order to find a region with a potentially visible signal. We investigate the significance of it through a full Monte Carlo simulation down to the parametrised detector level. We show that such a signal is an alternative promising channel to standard four-body searches for light BSM Higgs bosons at the LHC already with an integrated luminosity of 
. For a tenfold increase of the latter, discovery should be possible over most of the allowed parameter space.
© The Author(s) 2024
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Funded by SCOAP3.
