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Measurement of the top quark Yukawa coupling from $t\bar{t}$ differential cross-section
/ Sinha, Supriya (Deutsches Elektronen-Synchrotron (DE))
/ATLAS Collaboration
The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair ($t \bar{t}$) invariant mass in proton-proton collisions using $140\,\mathrm{fb}^{-1}$ of data at $\sqrt{s} = 13$ TeV collected in 2015-2018 by the ATLAS experiment at the Large Hadron Collider. In the region near the production threshold, the $t \overline{t}$ invariant mass spectrum is sensitive to electroweak virtual corrections, including contributions from Higgs boson exchange, thereby providing sensitivity to the top-quark Yukawa coupling. [...]
ATL-PHYS-SLIDE-2025-626.-
Geneva : CERN, 2025
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : LHC Top WG Meeting, Online, Online, 5 - 7 Nov 2025
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2025-11-10 09:45 |
ttWj EW and tt asymmetry EFT results
/ Kim, Dongwon (University of California Berkeley (US))
/ATLAS Collaboration
This presentation reports two recent ATLAS results interpreted in the framework of the Standard Model Effective Field Theory (SMEFT). The first is the search for electroweak production of t\bar{t}Wj This analysis provides the ATLAS constraints on the SMEFT operators \mathcal{O}{Ht} and \mathcal{O}{HQ}^{(1)}, which are among the least constrained in the top sector, and demonstrates how the inclusion of t\bar{t}Wj_{\mathrm{EW}} information helps resolve parameter degeneracies that remain when interpreting t\bar{t}Z data alone. [...]
ATL-PHYS-SLIDE-2025-625.-
Geneva : CERN, 2025
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : LHC Top WG Meeting, Online, Online, 5 - 7 Nov 2025
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2025-11-10 08:10 |
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