From Charge Correlators to QCD Correlation Functions: An EFT Perspective [Joint session with the TUM-MPP Seminar]

by Prof. Pier Francesco Monni (CERN)

Tuesday 12 May 2026, 11:00 → 12:00 Europe/Berlin

A.1.01 - Alps Süd (MPP)

Collider correlators have emerged as powerful probes of gauge theory dynamics at colliders. On the theoretical side, they provide a bridge to fundamental correlation functions (CFs), which encode a wealth of structural information about the underlying field theory. In this talk, I will explore this connection from two complementary perspectives. First, I will analyse the charge-charge correlator in QCD and demonstrate the emergence of a novel form of infrared safety in the back-to-back limit. I will then discuss how this kinematic regime is directly related to the double light-cone limit of a four-point CF of vector currents. This correspondence enables the construction of an effective field theory description for the CF, encoded in a factorisation theorem. Finally, I will demonstrate how to unify these results, providing a coherent framework that connects collider observables to fundamental CFs in QCD. I will conclude with a discussion of implications for collider phenomenology and directions for future work.

This is a joint session with the TUM-MPP Collider Phenomenology Seminar - see also https://indico.mpp.mpg.de/event/11899/