Search for high-mass dilepton resonances using 139 fb.sup.−1./sup. of pp collision data collected at √s=13 TeV with the ATLAS detector

0520618 - FZÚ 2020 RIV NL eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - 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 2925 authors
Search for high-mass dilepton resonances using 139 fb⁻¹ of pp collision data collected at √s=13 TeV with the ATLAS detector.
Physics Letters. B. Roč. 796, Sep (2019), s. 68-87. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * channel cross section: branching ratio: upper limit * spin: resonance * spin: 0 * spin: 1 * spin: 2
OECD category: Particles and field physics
Impact factor: 4.384, year: 2019
Method of publishing: Open access

A search for high-mass dielectron and dimuon resonances in the mass range of 250 GeV to 6 TeV is presented. The data were recorded by the ATLAS experiment in proton–proton collisions at a centre-of-mass energy of s=13 TeV during Run 2 of the Large Hadron Collider and correspond to an integrated luminosity of 139 fb −1 . A functional form is fitted to the dilepton invariant-mass distribution to model the contribution from background processes, and a generic signal shape is used to determine the significance of observed deviations from this background estimate. No significant deviation is observed and upper limits are placed at the 95% confidence level on the fiducial cross-section times branching ratio for various resonance width hypotheses. The derived limits are shown to be applicable to spin-0, spin-1 and spin-2 signal hypotheses.
Permanent Link: http://hdl.handle.net/11104/0305263