Observation of a cross-section enhancement near the tt production threshold in s=13 TeV pp collisions with the ATLAS detector
Abstract
A significant excess of tt events near the production threshold was observed in LHC Run-2 data by the ATLAS Collaboration. It is consistent with the formation of tt quasi-bound states, which were first hypothesised almost 40 years ago. This contribution summarises the experimental results and outlines a path toward further characterisation of the excess.
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