art%3A10.1007%2FJHEP09%282014%29015.pdf (1.29 MB)
Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at sv=8 TeV with the ATLAS detector
journal contribution
posted on 2023-06-15, 14:43 authored by Iacopo Vivarelli, Collaboration ATLASThe results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1fb-1 of proton–proton collision data at vs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t˜?t?˜01 or t˜? b?˜±1 ?bW(*)?˜01 , where ?˜01 (?˜±1 ) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t˜ ? t?˜01 . For a branching fraction of 100%, top squark masses in the range 270–645 GeV are excluded for ?˜01 masses below 30 GeV. For a branching fraction of 50% to either t˜ ? t?˜01 or t˜ ? b?˜±1 , and assuming the ?˜±1 mass to be twice the ?˜01 mass, top squark masses in the range 250–550 GeV are excluded for ?˜01 masses below 60 GeV.
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Publication status
- Published
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- Published version
Journal
Journal of High Energy PhysicsISSN
1029-8479Publisher
Springer VerlagExternal DOI
Issue
9Volume
2014Page range
15Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-06-08First Open Access (FOA) Date
2015-06-08First Compliant Deposit (FCD) Date
2015-06-08Usage metrics
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