• Open Access

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

M. Aaboud et al. (ATLAS Collaboration)
Phys. Rev. Lett. 121, 152002 – Published 12 October 2018

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 36.1fb1 of proton-proton collision data taken at s=13TeV 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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  • Received 13 June 2018
  • Revised 6 August 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.152002

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

© 2018 CERN, for the ATLAS Collaboration

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Particles & Fields

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Vol. 121, Iss. 15 — 12 October 2018

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