Balazs Konya
Researcher
Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV pp collisions with the ATLAS detector
Author
Summary, in English
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q=u,c) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark along with Higgs boson decays into two W bosons, two Z bosons or a τ+τ- pair. It focuses on final states containing either two leptons (electrons or muons) of the same charge or three leptons. The considered processes are tt¯ and Ht production. For the tt¯ production, one top quark decays via t→Hq. The proton–proton collision data set analysed amounts to (140fb-1) at (s=13TeV). No significant excess beyond Standard Model expectations is observed and upper limits are set on the t→Hq branching ratios at 95 % confidence level, amounting to observed (expected) limits of B(t→Hu)
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
- Department of Physics
Publishing year
2024
Language
English
Publication/Series
European Physical Journal C
Volume
84
Issue
7
Links
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Keywords
- Tellurium compounds
- ATLAS detectors
- Branching ratio
- Final state
- Flavor changing neutral currents
- Higgs boson
- Large Hadron Collider
- Large-hadron colliders
- Neutral current interactions
- Top quarks
- Upper limits
- Bosons
Status
Published
ISBN/ISSN/Other
- ISSN: 1434-6044