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Probing the Quantum Interference between Singly and Doubly Resonant Top-Quark Production in pp Collisions at √s = 13 TeV with the ATLAS Detector

ContributorsATLAS Collaboration
Published inPhysical Review Letters, vol. 121, no. 15
Collection
  • Open Access - SCOAP3
Publication date2018
Abstract

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.

Citation (ISO format)
ATLAS Collaboration. Probing the Quantum Interference between Singly and Doubly Resonant Top-Quark Production in pp Collisions at √s = 13 TeV with the ATLAS Detector. In: Physical Review Letters, 2018, vol. 121, n° 15. doi: 10.1103/PhysRevLett.121.152002
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Article (Published version)
Identifiers
Journal ISSN0031-9007
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Creation05/11/2018 09:34:03
First validation05/11/2018 09:34:03
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