Probing the quantum interference between singly and doubly resonant top-quark production in pp collisions at √s = 13 TeV with the ATLAS detector

0496849 - FZÚ 2019 RIV US 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 2916 authors
Probing the quantum interference between singly and doubly resonant top-quark production in pp collisions at √s = 13 TeV with the ATLAS detector.
Physical Review Letters. Roč. 121, č. 15 (2018), s. 1-20, č. článku 152002. ISSN 0031-9007. E-ISSN 1079-7114
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * numerical calculations * Monte Carlo * experimental results * 13000 GeV-cms * Elementary Particles and Fields
OECD category: Particles and field physics
Impact factor: 9.227, year: 2018

This Letter presents a normalized differential cross-section measurement in a fiducial phase-space region where interference effects between top-quark pair production and associated production of a single top quark with a W boson and a b-quark are significant. Events with exactly two leptons (ee, μμ, or eμ) and two b-tagged jets that satisfy a multiparticle invariant mass requirement are selected from 36.1  fb-1 of proton-proton collision data taken at s=13  TeV with the ATLAS detector at the LHC in 2015 and 2016. The results are compared with predictions from simulations using various strategies for the interference. The standard prescriptions for interference modeling are significantly different from each other but are within 2σ of the data. State-of-the-art predictions that naturally incorporate interference effects provide the best description of the data in the measured region of phase space most sensitive to these effects.
Permanent Link: http://hdl.handle.net/11104/0289485