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:European Physical Journal C

Collaboration, ATLAS and Barton, A.E. and Bertram, I.A. and Borissov, G. and Bouhova-Thacker, E.V. and Fox, H. and Henderson, R.C.W. and Jones, R.W.L. and Kartvelishvili, V. and Long, R.E. and Love, P.A. and Muenstermann, D. and Parker, A.J. and Sanderswood, Izaac and Smizanska, M. and Tee, A.S. and Walder, J. and Wharton, A.M. and Whitmore, B.W. and Yexley, Melissa (2020) 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:European Physical Journal C. Eur. Phys. J. C, 80 (8). ISSN 1434-6044

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Abstract

The results of a search for electroweakino pair production pp→χ~±1χ~02pp→χ~1±χ~20 in which the chargino (χ~±1χ~1±) decays into a W boson and the lightest neutralino (χ~01χ~10), while the heavier neutralino (χ~02χ~20) decays into the Standard Model 125 GeV Higgs boson and a second χ~01χ~10 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−1fb−1 of s√=13s=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/χ~02χ~1±/χ~20 up to 740 GeV are excluded at 95% confidence level for a massless χ~01χ~10.

Item Type:
Journal Article
Journal or Publication Title:
Eur. Phys. J. C
ID Code:
147376
Deposited By:
Deposited On:
14 Sep 2020 15:35
Refereed?:
Yes
Published?:
Published
Last Modified:
28 Sep 2020 03:15