Else Lytken
Professor
Probing the Quantum Interference between Singly and Doubly Resonant Top-Quark Production in pp Collisions at s =13 TeV with the ATLAS Detector
Author
Summary, in English
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. © 2018 CERN.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2018
Language
English
Publication/Series
Physical Review Letters
Volume
121
Issue
15
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- Bosons
- Phase space methods
- Differential cross section
- Interference effects
- Interference modeling
- Interference models
- Phase space regions
- Proton proton collisions
- Quantum interference
- State of the art
- Tellurium compounds
Status
Published
ISBN/ISSN/Other
- ISSN: 1079-7114