Speaker
Description
Measurements of hard probes in $e^{+}e^{-}$ collision data are essential components of parallel studies of hard probes in proton-proton and heavy-ion collisions as $e^{+}e^{-}$ collisions offer a true reference for such systems free from any hadronic initial state effects. Recently, a measurement of the two-point energy correlator using archived ALEPH e+e- data allowed the collinear and Sudakov limits of QCD to be studied simultaneously with the highest precision ever performed. In this talk, this recent measurement will be discussed and compared to a state of the art theoretical description, at NNLL accuracy in the collinear limit and NNNNLL accuracy in the back-to-back limit, achieving percent-level agreement. In addition, the event multiplicity dependence of these results, which is highly related to the understanding of EEC from small to large systems, will be shown for the first time. These results further investigate the presence of experimental signatures commonly attributed to collective phenomena in high-multiplicity $e^{+}e^{-}$ collisions, serving as an important baseline for measurements of these signatures in larger collision systems.
| Is this an experimental talk? | Yes |
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| Is this on behalf of a collaboration? | No |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |