title: Boosting Higgs pair production in the [Formula: see text] final state with multivariate techniques.
abstract: 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 [Formula: see text] 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 4bQCD background. We demonstrate the robustness of our analysis strategy in a high pileup environment. For an integrated luminosity of [Formula: see text] ab[Formula: see text], a signal significance of [Formula: see text] is obtained, indicating that the [Formula: see text] final state alone could allow for the observation of double Higgs production at the High Luminosity LHC.
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: J Katharina
authors.initials: JK
authors.lastname: Behr
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: Daniela
authors.initials: D
authors.lastname: Bortoletto
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: James A
authors.initials: JA
authors.lastname: Frost
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Hartland
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: Cigdem
authors.initials: C
authors.lastname: Issever
authors.affiliation: Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.
authors.forename: Juan
authors.initials: J
authors.lastname: Rojo