The experimental road from Soft to Perturbative QCD

by Valentina Cairo (The State University of New York SUNY (US))

Tuesday 24 Jul 2018, 12:30 → 14:00 US/Pacific

Other Institutes

The essence of Quantum Chromodynamics (QCD) dates back to the 60s, when scientists started to build up the theory of strong interactions to describe how protons and neutrons are bound together in nucleii. Years of studies have led to the understanding of interactions between partons, and QCD is now one of the building blocks of the Standard Model of particle physics.

 

In proton-proton collisions, events characterized by high momentum transfer constitute only a tiny fraction of the total cross-section, which is dominated by soft QCD events (peripheral processes). While hard QCD processes can be studied by means of perturbative approaches, this is not possible for soft QCD events.

 

Measurements of inclusive charged-particle distributions and vector boson production in association with b-jets were performed with the ATLAS Experiment in proton-proton collisions delivered by the Large Hadron Collider. The studies presented today shed light on the experimental road from soft to perturbative QCD tests. Performance metrics that are critical for the analyses will also be described with particular emphasis on tracking algorithms and studies of the passive material distribution in the Inner Detector as well as the usage of track reconstruction systematics in the calibration of the misidentification rate of light-flavour jets.

TheExpRoadOfQCD_SLACSeminar_VMMCAIRO_24July2018_noExtraSlides.pdf