Boosting Higgs pair production in the $b\bar{b}b\bar{b}$ final state with multivariate techniques

Apr 13, 2016, 5:30 PM
15m
SR4b (DESY Hamburg)

SR4b

DESY Hamburg

Electroweak Physics and Beyond the Standard Model WG3 Electroweak Physics and Beyond the Standard Model

Speaker

Dr Nathan Hartland (Oxford)

Description

The measurement of Higgs pair production will be a cornerstone of the LHC program in the coming years. Double Higgs production provides a crucial window upon the mechanism of electroweak symmetry breaking and has a unique sensitivity to the Higgs trilinear coupling. We study the feasibility of a measurement of Higgs pair production in the b ̄bb ̄b final state at the LHC. Our analysis is based on a combination of traditional cut- based methods with state-of-the-art multivariate techniques. We account for all relevant backgrounds, including the contributions from light and charm jet mis-identification, which are ultimately comparable in size to the irreducible 4b QCD background. We demonstrate the robustness of our analysis strategy in a high pileup environment. For an integrated luminosity of L = 3 ab−1, a signal significance of S/√B ≃ 3 is obtained, indicating that the b ̄bb ̄b final state alone could allow for the observation of double Higgs production at the High Luminosity LHC.

Primary author

Dr Nathan Hartland (Oxford)

Presentation materials