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We present a reinterpretation study of existing results from the CMSCollaboration, 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 avariety of final states, in the context of the CP-conserving 2-Higgs DoubletModel (2HDM) Type-I. Through this, we test the Large Hadron Collider (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 perform a systematic scan over the2HDM Type-I parameter space, by taking into account all available theoreticaland experimental constraints, in order to find a region with a potentiallyvisible signal. We investigate the significance of it through a full MonteCarlo simulation down to the parametrised detector level. We show that such asignal is an alternative promising channel to standard four-body searches forlight 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 bepossible over most of the allowed parameter space.

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