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

Allbrooke, Benedict, Asquith, Lily, Cerri, Alessandro, DeSanto, Antonella, Salvatore, Fabrizio, Suruliz, Kerim, Sutton, Mark and Vivarelli, Iacopo (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, 7 (195). ISSN 1126-6708

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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 ˜χ01 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: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Iacopo Vivarelli
Date Deposited: 22 Nov 2017 09:37
Last Modified: 12 Dec 2017 11:52
URI: http://sro.sussex.ac.uk/id/eprint/71474

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