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| CMS-PAS-B2G-21-007 | ||
| Search of a Vector-Like Quark T' $\to$ tH in the di-photon final state | ||
| CMS Collaboration | ||
| July 2022 | ||
| Abstract: A search for the production of a Vector-Like Quark, T' is presented. The search is based on proton-proton collision events collected at 13 TeV by the CMS detector at the CERN LHC. The data sample corresponds to an integrated luminonsity of 138 fb$^{-1}$, collected between 2016 and 2018. The search looks specifically for the production of a T' quark which then decays to a top quark and a Higgs boson (T' $\to$ tH); with the Higgs boson subsequently decaying into a pair of photons (H $\to \gamma \gamma$). The top quark can decay either hadronically ($ \mathrm{t \to bq\bar{q} } $) or leptonically ($t \rightarrow bl\nu$). This search presents an upper limit on the T' production cross section for the mass range 600-1200 GeV. No significant excess over the standard model background is observed, accordingly T' masses up to 730 GeV are excluded at 95% confidence level. This search is the first to use the reconstruction of the H $\to \gamma \gamma$ invariant mass, leveraging an experimental resolution of 1-2%. This technique leads to an increased sensitivity to T' mass values up to 1 TeV with respect to the previous searches. | ||
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Links:
CDS record (PDF) ;
Physics Briefing ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 09 (2023) 057. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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