#StudentSeminar: Mastering Jet calibrations for precision physics

por Miguel Jimenez

jueves 9 jul. 2026 15:00 → 16:30 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

As we push the boundaries of high-luminosity physics at the LHC, our discoveries are no longer just limited by how much data we can collect, but by how well we understand our detectors. Hadronic jets are everywhere in the ATLAS experiment, serving as vital pieces of almost every major physics analysis. Because of this, even a tiny mismatch in how we measure jet energies can completely stall our progress.

In this seminar, I will take you behind the scenes of how the ATLAS collaboration achieves world-class jet energy scale (JES) precision, focusing on the crucial in-situ calibration stage. We will look at how we use well-understood reference objects—like $Z$ bosons and photons—to balance against jets, allowing us to correct the subtle differences between our data and simulations. Finally, I’ll connect the dots between these technical calibrations and their massive payoff for precision physics. Using the top quark mass measurements as a prime example, we’ll explore how mastering the JES or bJES allows us to chip away at our dominant systematic uncertainties and push forward the precision needed to stress-test the Standard Model.