Speaker
Description
The production of top quarks at high-energy colliders plays a pivotal role in testing the Standard Model (SM) and in probing possible signs of new physics. In hadronic collisions, the primary source of top-quark events within the SM is top-quark pair ($t \bar t$) production and, since the top quark is unstable, the signature is almost exclusively characterised by two bottom quarks and the decay products of two $W$ bosons. In this talk, we focus on the so-called dilepton channel where both $W$ bosons decay leptonically.
With the increasing precision of current measurements and the expected sensitivity of future experimental analyses, accurate theoretical predictions for the complete $2 \to 6$ process, including all relevant off-shell effects, irreducible backgrounds and interferences, are essential. We present recent progress towards a next-to-next-to-leading (NNLO) QCD prediction for the off-shell $t \bar t$ production within the MATRIX framework, focusing on the theoretical developments and key challenges.
| Track | 6: Heavy Quarks (including top and flavour physics) |
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