Search for Higgs boson pair production in the $\gamma\gamma\mathrm{b\overline{b}}$ final state in pp collisions at $\sqrt{s}=$ 13 TeV

Bakhshiansohi, Hamed [UCL] Bondu, Olivier [UCL] Brochet, Sébastien [UCL] Bruno, Giacomo [UCL] Caputo, Claudio [UCL] Caudron, Adrien [UCL] David, Pieter [UCL] De Visscher, Simon [UCL] Delaere, Christophe [UCL] Delcourt, Martin [UCL] Francois, Brieuc [UCL] Giammanco, Andrea [UCL] Komm, Matthias [UCL] Krintiras, Georgios [UCL] Lemaitre, Vincent [UCL] Magitteri, Alessio [UCL] Mertens, Alexandre [UCL] Musich, Marco [UCL] Piotrzkowski, Krzysztof [UCL] Quertenmont, Loic [UCL] Saggio, Alessia [UCL] Vidal Marono, Miguel [UCL] Wertz, Sébastien [UCL] Zobec, Joze [UCL] CMS Collaboration et al.

A search is presented for the production of a pair of Higgs bosons, where one decays into two photons and the other one into a bottom quark-antiquark pair. The analysis is performed using proton-proton collision data at $\sqrt{s} =$ 13 TeV marc:recorded in 2016 by the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The results are in agreement with standard model (SM) predictions. In a search for resonant production, upper limits are set on the cross section for new spin-0 or spin-2 particles. For the SM-like nonresonant production hypothesis, the data exclude a product of cross section and branching fraction larger than 2.0 fb at 95% confidence level (CL), corresponding to about 24 times the SM prediction. Values of the effective Higgs boson self-coupling $\kappa_\lambda$ are constrained to be within the range $-$11 < $\kappa_\lambda$ < 17 at 95% CL, assuming all other Higgs boson couplings are at their SM value. These constraints are the most restrictive to date.