Searches for production of two Higgs bosons using the CMS detector

Four searches for the production of two Higgs bosons using the CMS detector are presented. The analyses are performed on $pp$ collision data collected during the Run I of the LHC at $\sqrt{s}=7-8$~TeV corresponding to an integrated luminosity of $5.1-17.9$-$19.7$~fb$^{-1}$. The analyses are covering the resonant production of Higgs boson pairs in the $b\bar{b}\gamma\gamma$ and $b\bar{b}b\bar{b}$ final states for masses between $260$ and $1100$~GeV, the resonant production of Higgs boson pairs in multilepton and diphoton final states for masses between $260$ and $360$~GeV, as well as additional Higgs boson-like states in the diphoton spectrum for masses between $110$ and $150$~GeV. The observations are compatible with expectations from standard model processes, and upper limits at $95$\% confidence-level are extracted on the production cross section of new particles.