Bonn 2020 – scientific programme
The DPG Spring Meeting in Bonn had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 79: Experimental methods IV
T 79.6: Talk
Thursday, April 2, 2020, 17:45–18:00, H-ÜR 1
Study of the detector occupancy and track selection efficiencies in Z → µ µ events for the track-counting luminosity measurement in ATLAS — •Surabhi Sharma1, Valerie Lang2, and Ingrid-Maria Gregor1 — 1DESY, Hamburg, Germany — 2Albert-Ludwigs-Universität, Freiburg, Germany
Particle production at the Large Hadron Collider (LHC) is driven by two important parameters: the centre-of-mass energy and the luminosity. While the centre-of-mass energy is determined by the LHC accelerator, the luminosity delivered to the ATLAS experiment needs to be measured to very high precision, in order to fulfill the physics goals of the ATLAS. In order to provide an accurate and reliable luminosity measurement, ATLAS uses a variety of methods. One of these method is track-counting. The number of charged particle tracks in the inner detector of the ATLAS experiment is proportional to the number of simultaneous proton-proton collisions, and hence the luminosity. A reliable luminosity measurement using this technique requires high and stable tracking efficiencies for the selection of tracks.
In this work, Z → µ µ events are used to study the efficiencies for different track selections. These efficiencies can be used to correct inefficiencies of the track counting luminosity measurement, assuming if there is variation in track selection efficiencies same would be seen in luminosity measurement. This assumption is studied by establishing a method to directly monitor changes in the track-related occupancy of the detector.