Resonant Higgs boson pair production in the $hh\rightarrow b\bar{b} \; WW \rightarrow b\bar{b} \ell^+ ν\ell^- \barν$ decay channel

Victor Martin-Lozano; Jesus M. Moreno; Chan Beom Park

paper

Resonant Higgs boson pair production in the $hh \to b b ˉ W W \to b b ˉ ℓ^{+} ν ℓ^{-} ν ˉ$ decay channel

arXiv:1501.03799

Abstract

Adding a scalar singlet provides one of the simplest extensions of the Standard Model. In this work we briefly review the latest constraints on the mass and mixing of the new Higgs boson and study its production and decay at the LHC. We mainly focus on double Higgs production in the $hh \to b b ˉ W W \to b b ˉ ℓ^{+} ν ℓ^{-} ν ˉ$ decay channel. This decay is found to be efficient in a region of masses of the heavy Higgs boson of 260 - 500 GeV, so it is complementary to the 4 $b$ channel, more efficient for Higgs bosons having masses greater than 500 GeV. We analyse this di-leptonic decay channel in detail using kinematic variables such as $M_{T2}$ and the $M_{T2}$ -assisted on-shell reconstruction of invisible momenta. Using proper cuts, a significance of $\sim$ 3 $σ$ for 3000 fb $^{- 1}$ can be achieved at the 14 TeV LHC for $m_{H}$ = 260 - 400 GeV if the mixing is close to its present limit and $BR (H \to hh) \approx 1$ . Smaller mixing values would require combining various decay channels in order to reach a similar significance. The complementarity among $H \to hh$ , $H \to Z Z$ and $H \to W W$ channels is studied for arbitrary $BR (H \to hh)$ values.

arXiv comment36 pages, 13 figures

Resonant Higgs boson pair production in the hh→bbˉWW→bbˉℓ+νℓ−νˉ decay channel

Abstract

Cited by in corpus (7)

Resonant Higgs boson pair production in the $hh \to b b ˉ W W \to b b ˉ ℓ^{+} ν ℓ^{-} ν ˉ$ decay channel