Search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two b-jets in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, M. Faucci Giannelli, A. Hasib, M.P. Heath, X. Hoad, A. Søgaard, E.P. Takeva, A.J. Taylor, A. Washbrook

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The results of a search for electroweakino pair production pp → ˜χ±1 ˜χ02 in which the chargino ( ˜χ±1 ) decays into a W boson and the lightest neutralino ( ˜χ01 ), while the heavier neutralino ( ˜χ02 ) decays into the Standard Model 125
GeV Higgs boson and a second ˜χ01 are presented. The signal selection requires a pair of b-tagged jets consistent with those from a Higgs boson decay, and either an electron or a muon from the W boson decay, together with missing transverse momentum from the corresponding neutrino and the stable
neutralinos. The analysis is based on data corresponding to 139 fb−1 of √s = 13 TeV pp collisions provided by the Large Hadron Collider and recorded by the ATLAS detector. No statistically significant evidence of an excess of events
above the Standard Model expectation is found. Limits are set on the direct production of the electroweakinos in simplified models, assuming pure wino cross-sections. Masses of ˜χ±1 / ˜χ02 up to 740 GeV are excluded at 95% confidence level for a massless ˜χ01.
Original languageEnglish
Article number691
Pages (from-to)1-29
Number of pages29
JournalThe European Physical Journal C
Volume80
Issue number8
DOIs
Publication statusPublished - 1 Aug 2020

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