Search for resonant HH production in 2gamma+2b channel

A search for the resonant production of Higgs pairs in the decay channel $X \rightarrow HH \rightarrow \gamma\gamma b\bar{b}$ in pp collisions at $\sqrt{s}=8$ TeV is reported. The event sample corresponds to an integrated luminosity of 19.7 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=8$ TeV collected by the CMS detector. The candidate events are selected by requiring two photons and two jets and classified according to the number of jets tagged as coming from the hadronization of b-quarks. The search for a new particle X is performed in the range $260 < m_X < 1100$ GeV. The observations are consistent with expectations from standard model processes. Upper limits at 95 $\%$ confidence-level are extracted on new particles production cross-section, and compared to the predictions of some theories beyond the standard model of elementary particles based on the assumption of the existence of warped extra dimensions. The radion with $\Lambda_R =1$ TeV is observed (expected) to be excluded with masses below 0.97 TeV (0.88 TeV), while the analysis is not sensitive to the radion with $\Lambda_R =3$ TeV.