Identification of double-b quark jets in boosted event topologies

Searches for new physics at the LHC necessitate to distinguish the merged decay products of resonances produced with high transverse momentum, from jets that originate from single partons. We present an algorithm that aims to reconstruct the $\mathrm{b\overline{b}}$ decay mode of such resonances. The algorithm is applicable to any resonance with the mass close to the W/Z/H boson mass and with high enough energy for its decay products to be clustered in a single jet within a cone of size $R=0.8$. An example is the 125 GeV Higgs boson which is the focus of this document. The efficiency and the mistag rate from top quark jets have been measured using the $2.6~\mathrm{fb}^{-1}$ dataset collected with the CMS experiment at 13 TeV in 2015.