Göran Jarlskog
Professor emeritus
Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s =13 TeV with the ATLAS Detector
Author
Summary, in English
A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T→Zt/Wb/Ht, B→Zb/Wt/Hb) is performed using 36.1 fb-1 of pp collision data at s=13 TeV with the ATLAS detector at the Large Hadron Collider. The observed data are found to be in good agreement with the standard model background prediction in all individual searches. Therefore, combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches. Model-independent limits are set assuming the vectorlike quarks decay to standard model particles. A singlet T is excluded for masses below 1.31 TeV and a singlet B is excluded for masses below 1.22 TeV. Assuming a weak isospin (T,B) doublet and |VTb|â‰|VtB|, T and B masses below 1.37 TeV are excluded. © 2018 CERN. for the ATLAS Collaboration.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2018
Language
English
Publication/Series
Physical Review Letters
Volume
121
Issue
21
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- Elementary particles
- ATLAS detectors
- Background prediction
- Confidence levels
- Large Hadron Collider
- Model independent
- Production cross section
- The standard model
- Third generation
- Tellurium compounds
Status
Published
ISBN/ISSN/Other
- ISSN: 1079-7114