Abstract

Collider correlators are rapidly emerging as a powerful tool for the study of QCD dynamics. On one hand they can be precisely measured experimentally and on the other hand they are closely connected with fundamental QFT quantities such as correlation functions, allowing for powerful theoretical techniques to be employed in their determination.
In this blackboard talk, we will discuss the use of energy-energy correlators (EECs) to determine the value of the strong coupling constant. Starting from the EEC in electron-positron annihilation we will cover the behaviour of this collider correlator in different kinematic regions, highlighting features that emerge at different scales both perturbatively and non perturbatively. One such region is the collinear limit, which is also naturally relevant for jet substructure measurements at the LHC. We will then review the recent CMS measurement of projected two and three point correlators and extraction of alphas. We will finally discuss future directions including strategies to enhance experimental precision and other related observables.

Speakers

Gherardo Vita obtained his PhD from MIT in 2020. He subsequently held a postdoctoral position at SLAC until 2023, and he is currently a CERN TH fellow. His research focuses on QCD, with work on EFTs such as Soft and Collinear Effective Theory as well as N3LO perturbative calculations and resummation at N4LL for collider observables

Simon Rothman is a fifth-year PhD student at MIT, and a member of the CMS collaboration. His research focus is jet substructure and measurement of QCD dynamics at the LHC. He also works on precision detector reconstruction, including use of machine learning for readout, reconstruction, and analysis.