Fat Jets for a Light Higgs Boson

At the LHC associated top quark and Higgs boson production with a Higgs boson decay to bottom quarks has long been a heavily disputed search channel. Recently, it has been found not to be viable. We show how it can be observed by tagging massive Higgs bosons and top jets. For this purpose we construct boosted top and Higgs taggers for standard-model processes in a complex QCD environment.

Figure 1

Normalized top and (reconstructed) Higgs transverse momentum spectra in $t\overline{t}H$ and $t\overline{t}b\overline{b}$ production. As a reference we also show $p_{T,H}$ in $W^{-}H$. production.

Figure 2

Reconstructed bottom-pair mass $m_{bb}^{\mathrm{rec}}$ for signal ($m_H=120\mathrm{GeV}$) and backgrounds without (upper) and including (lower) underlying event. The distributions shown include three $b$ tags.