Search for supersymmetry in events with b-tagged jets and missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector

Barton, Adam Edward and Beattie, Michael and Bertram, Iain Alexander and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Muenstermann, Daniel Matthias Alfred and Parker, Adam Jackson and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy and Whitmore, Ben (2017) Search for supersymmetry in events with b-tagged jets and missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (11). ISSN 1029-8479

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Abstract

A search for the supersymmetric partners of the Standard Model bottom and top quarks is presented. The search uses 36.1 fb−1 of pp collision data at √s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Direct production of pairs of bottom and top squarks ( b¯¯1 and t¯1) is searched for in final states with b-tagged jets and missing transverse momentum. Distinctive selections are defined with either no charged leptons (electrons or muons) in the final state, or one charged lepton. The zero-lepton selection targets models in which the b¯¯1 is the lightest squark and decays via b¯¯1→bχ¯¯¯01, where χ¯¯¯01 is the lightest neutralino. The one-lepton final state targets models where bottom or top squarks are produced and can decay into multiple channels, b¯¯1→bχ¯¯¯01 and b¯¯1→tχ¯¯¯±1, or t¯1→tχ¯¯¯01 and t¯1→bχ¯¯¯±1, where χ¯¯¯±1 is the lightest chargino and the mass difference mχ¯¯¯¯±1−mχ¯¯¯¯01 is set to 1 GeV. No excess above the expected Standard Model background is observed. Exclusion limits at 95% confidence level on the mass of third-generation squarks are derived in various supersymmetry-inspired simplified models.

Item Type: Journal Article
Journal or Publication Title: Journal of High Energy Physics
Additional Information: JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 124072
Deposited By: ep_importer_pure
Deposited On: 15 Mar 2018 12:30
Refereed?: Yes
Published?: Published
Last Modified: 25 Feb 2020 08:15
URI: https://eprints.lancs.ac.uk/id/eprint/124072

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