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Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.ORCID iD: 0000-0002-1253-8583
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.ORCID iD: 0000-0002-7341-9115
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Number of Authors: 28422017 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 77, no 3, article id 144Article in journal (Refereed) Published
Abstract [en]

Two searches for new phenomena in final states containing a same-flavour opposite-sign lepton (electron or muon) pair, jets, and large missing transverse momentum are presented. These searches make use of proton-proton collision data, collected during 2015 and 2016 at a centre-of-mass energy root s = 13 TeV by the ATLAS detector at the large hadron collider, which correspond to an integrated luminosity of 14.7 fb(-1). Both searches target the pair production of supersymmetric particles, squarks or gluinos, which decay to final states containing a same-flavour opposite-sign lepton pair via one of two mechanisms: a leptonically decaying Z boson in the final state, leading to a peak in the dilepton invariant-mass distribution around the Z boson mass; and decays of neutralinos (e.g.. (chi) over tilde (0)(2) -> l(+)l(-1)(chi) over tilde (0)(1)), yielding a kinematic endpoint in the dilepton invariant-mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted in simplified models of gluino-pair (squark-pair) production, and provide sensitivity to gluinos (squarks) with masses as large as 1.70 TeV (980 GeV).

Place, publisher, year, edition, pages
2017. Vol. 77, no 3, article id 144
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-327264DOI: 10.1140/epjc/s10052-017-4700-5ISI: 000396119600002Scopus ID: 2-s2.0-85014651064OAI: oai:DiVA.org:uu-327264DiVA, id: diva2:1134341
Note

Title in WoS: Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector

ATLAS Collaboration, for complete list of authors see https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-4700-5

Available from: 2017-08-18 Created: 2017-08-18 Last updated: 2017-08-18Bibliographically approved

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Bergeås Kuutmann, ElinBrenner, RichardEkelöf, TordEllert, MattiasFerrari, Arnaud
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