CMS-PAS-HIG-21-011

CMS-PAS-HIG-21-011
Search for a new resonance decaying to two scalars in the final state with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
CMS Collaboration
July 2022

Abstract: A search for new resonances in the final state with two bottom quarks and two photons is presented, using CERN LHC proton-proton collision data collected by the CMS experiment at $\sqrt{s} = $ 13 TeV, and corresponding to an integrated luminosity of 138 fb$^{-1}$. The resonance X decays into either a pair of the standard model Higgs bosons HH, or an H and a new scalar $\mathrm{Y}$ having a mass $m_{\mathrm{Y}} < m_{\mathrm{X}} - m_{\mathrm{H}}$. A model-independent analysis is performed with a narrow-width approximation for X in the mass range 260 GeV-1 TeV (for the HH decay) and 300 GeV-1 TeV (for the HY decay), covering a mass range of 90 $ < m_{\mathrm{Y}} < $ 800 GeV. The upper limits at 95% confidence level on the product of the production cross section of spin-0 X and its decay branching fraction to HH are observed to be within 0.82-0.07 fb, while the corresponding expected limits are 0.74 - 0.08 fb, depending upon the considered mass range in $m_{\mathrm{X}}$. For the X decaying to HY, the observed limits lie in the range 0.90-0.04 fb whereas the expected limits are 0.79-0.05 fb, with the considered mass ranges in $m_{\mathrm{X}}$ and $m_{\mathrm{Y}}$. The largest deviation from background-only hypothesis with local (global) significance of 3.8 (2.8) standard deviations is observed for $m_{\mathrm{X}}= $ 650 GeV and $m_{\mathrm{Y}}= $ 90 GeV. The HH limits are compared with predictions in the warped extra dimensional model. The HY limits are interpreted with the next-to-minimal supersymmetric standard model and the two-real-scalar-singlet model.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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