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https://hdl.handle.net/10316/108164
Title: | Search for direct top squark pair production in final states with two leptons in √s=13 TeV pp collisions with the ATLAS detector | Authors: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Issue Date: | 2017 | Publisher: | Springer Nature | Serial title, monograph or event: | European Physical Journal C | Volume: | 77 | Issue: | 12 | Abstract: | The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb−1 of integrated luminosity from proton–proton collisions at √ s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark ˜t and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay ˜t → b˜χ ± 1 into a b-quark and the lightest chargino with ˜χ ± 1 → W ˜χ 0 1 , the decay ˜t → t ˜χ 0 1 into an on-shell top quark and the lightest neutralino, the three-body decay ˜t → bW ˜χ 0 1 and the four-body decay ˜t → b ν ˜χ 0 1 . No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the ˜t and ˜χ 0 1 masses. The results exclude at 95% confidence level ˜t masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches. | URI: | https://hdl.handle.net/10316/108164 | DOI: | 10.1140/epjc/s10052-017-5445-x | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Search-for-direct-top-squark-pair-production-in-final-states-with-two-leptons-in-s13-TeV-pp-collisions-with-the-ATLAS-detectorEuropean-Physical-Journal-C.pdf | 2.36 MB | Adobe PDF | View/Open |
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