Speaker
Description
Energy-energy correlators (EECs), defined as energy-weighted two-particle correlations within jets as a function of angular separation, have emerged as powerful probes of jet substructure across multiple QCD scales. In vacuum, EECs exhibit a clear separation between perturbative dynamics at large angles and non-perturbative physics at small angles. In heavy-ion collisions, jets traversing the quark-gluon plasma (QGP) undergo medium-induced modifications that alter their internal structure, making EECs sensitive probes of jet-medium interactions. In particualr, the path-length dependence of energy loss can be directly investigated using the assymtries in dijet systems.
The poster presents studies of inclusive and dijet EECs in proton–proton collisions using PYTHIA8 simulations and ALICE Run 3 data. The inclusive EEC establishes a precision baseline for understanding parton fragmentation in vacuum, using the significantly improved Run 3 statisitics to extend the kinematic reach of measurements to higher jet transverse momentum. In dijets, measuring the EECs seperately for the leading and subleading jet, as a function of the dijet momentum assymetry, provide additional insight on how the transition from perturbative to non-perturbative regimes depends on the interplay of the initial parton virtualities and the quenched jet momentum scale. These measurements provide the essential pp reference for quantifying QGP-induced modifications in future Pb-Pb measurements.
| Is this an experimental talk? | Yes |
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| Is this on behalf of a collaboration? | Yes |
| Which collaboration? | ALICE |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |