Searching for QCD Instantons at hadron colliders

by Simone Amoroso (Deutsches Elektronen-Synchrotron (DE))

Tuesday 27 Apr 2021, 11:30 → 12:30 Europe/Zurich

https://fisica-unimi.zoom.us/j/93801268810?pwd=NHB5c2N3aVhFVlNSSllGeWNLNUxCQT09

The existence of topological solutions of the Standard Model field equations has been established since the 70ies. In Quantum Chromodynamics, these "Instanton transitions" are known to play a fundamental role in the long-distance behaviour of the theory, yet direct experimental evidence of these phenomena is still lacking. This raises the question of whether these processes could be observed at current or future high-energy colliders. In this seminar, I will discuss signatures of Instanton induced processes at hadron colliders, and present different search strategies aiming to disentangle the contribution of QCD Instantons from the large background from other QCD processes. I will also show first upper limits on the Instanton production cross-section derived from published LHC data, and the expected sensitivity from future targeted searches at the LHC and HL-LHC.

InstantonSeminar_UNIMIB.pdf

Zoom link for VideoConference