Model independent search for Higgs boson pair production in the $\mathrm{b\overline{b}}\tau^+\tau^-$ final state

Results of a search for the production of Higgs boson pairs are presented. In this search one Higgs boson decays to a pair of b-quarks, and the other Higgs boson decays to a tau lepton pair where the tau leptons decay hadronically. The search is based on proton-proton collision data recorded by the CMS experiment at $\sqrt{s} = 8~\mathrm{TeV}$ in $2012$, corresponding to an integrated luminosity of $18.3~\mathrm{fb}^{-1}$. The resonant and the non-resonant productions of Higgs boson pairs are studied. No significant excess with respect to the background-only hypothesis is observed in the data and therefore corresponding upper limits on cross section times branching ratio are set. In the case of resonant $\mathrm{HH}$ boson production, the limit on $\sigma(\mathrm{pp} \to X) \times \mathrm{BR}(X \to \mathrm{HH})$ for a resonance of spin 0 (spin 2) and mass $m_{X}$, ranges from $5.42~\mathrm{pb}$ ($3.97~\mathrm{pb}$) at $m_{X}=300~\mathrm{GeV}$ to $0.14~\mathrm{pb}$ ($0.14~\mathrm{pb}$) at $m_{X}=1000~\mathrm{GeV}$. The limit on non-resonant production amounts to approximately 50 times the rate predicted by the SM.