CERN Accelerating science

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Comparison of the photon $p_\mathrm{T}$ distribution from the combined measurement in the single-lepton and dilepton channels with the SM prediction and scenarios with one non-zero EFT parameter. The lower panel shows the ratio of predictions to the data. \cite{ATLAS:2024hmk}

: $\mathrm{Re}[C_{tW}]$ vs. $\mathrm{Im}[C_{tB}]$ from $t\bar{t}\gamma$ measurements alone.

: $\mathrm{Im}[C_{t\gamma}]$ vs. $\mathrm{Re}[C_{t\gamma}]$ from $t\bar{t}\gamma$ and $t\bar{t}Z$ measurements.

: SR plus (with $l^{+}$)

: SR minus (with $l^{-}$)

Observed event yields in the SR compared with MC simulations as a function of the scalar sum of the lepton and jet transverse momenta $H_\mathrm{T}$. The signal sample is generated with all Wilson coefficients simultaneously set to 0.1 for a new physics scale of $\Lambda$ = 1 TeV. \cite{ATLAS:2024njy}