Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in √s =13 TeV pp collisions with the ATLAS detector

0500344 - FZÚ 2019 RIV DE eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2885 authors
Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in √s =13 TeV pp collisions with the ATLAS detector.
European Physical Journal C. Roč. 78, č. 8 (2018), s. 1-38, č. článku 625. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LTT17018
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * supersymmetry * kinematics * squark * lower limit * gluino * mass * lower limit * experimental results * 13000 GeV-cms
OECD category: Particles and field physics
Impact factor: 4.843, year: 2018

A search for new phenomena in final states containing an e+e− or μ+μ− pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton–proton collision data with an integrated luminosity of 36.1 fb−1 , collected during 2015 and 2016 at a centre-of-mass energy s√=13 TeV with the ATLAS detector at the Large Hadron Collider. The search targets the pair production of supersymmetric coloured particles (squarks or gluinos) and their decays into final states containing an e+e− or μ+μ− pair and the lightest neutralino ( χ~01 ) via one of two next-to-lightest neutralino ( χ~02 ) decay mechanisms: χ~02→Zχ~01 , where the Z boson decays leptonically leading to a peak in the dilepton invariant mass distribution around the Z boson mass, and χ~02→ℓ+ℓ−χ~01 with no intermediate ℓ+ℓ− resonance, yielding a kinematic endpoint in the dilepton invariant mass spectrum.

Permanent Link: http://hdl.handle.net/11104/0292435