Speaker
Description
The tau-algorithm provides a reliable method for extracting QCD parton formation time within jet algorithms. As demonstrated in [1], it effectively distinguishes between heavily modified jets and those with minimal medium-induced changes, offering a robust measure of energy loss independent of the initial jet scale [2], unlike other jet substructure methods. In this talk, we demonstrate the tau-algorithm’s application in probing energy loss within small systems, including high-multiplicity proton-proton collisions, to address the key question of whether a Quark-Gluon Plasma forms in such systems. Our findings impose stringent limits on the presence of QGP signatures in small systems. Additionally, we reveal how energy loss influences parton formation time, differentiating modifications occurring prior to and following the initial splitting. These insights underscore QCD parton formation time as an effective metric for in-medium path length, advancing new tomographic methods for QGP studies.
[1] L. Apolinário, A. Cordeiro, K. Zapp, Eur.Phys.J.C 81 (2021) 6, 561
[2] L. Apolinário, P. Guerrero-Rodriguez, K. Zapp, Eur.Phys.J.C 84 (2024) 7, 672
| Category | Theory |
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