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

doi:10.1103/PhysRevLett.121.152002

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Title: Probing the quantum interference between singly and doubly resonant top-quark production in pp collisions at √s=13 TeV with the ATLAS detector
Creator: Aad, G.
Creator: Abbott, B.
Creator: Chelkov, G. A.
Creator: Khodinov, A.
Creator: Parida, B.
Creator: Tsybychev, D.
Creator: Vaniachine, A.
Creator: Aaboud, M.
Subject: ATLAS, детектор
Большой адронный коллайдер
протон-протонные столкновения
Date: 2018
DOI: 10.1103/PhysRevLett.121.152002
Description: 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. These results provide an important constraint on interference models and will guide future model development and tuning.

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Identifier: vtls:000658568
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000658568
Type: статьи в журналах
Source: Physical Review Letters. 2018. Vol. 121, № 15. P. 152002-1-152002-20
Language: eng

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