Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 67: Detektorsysteme III

T 67.1: Talk

Wednesday, March 27, 2019, 16:00–16:15, S03

Tracking efficiencies for the track selections in the track-counting luminosity measurement in ATLAS. — •Surabhi Sharma — DESY, Hamburg

Particle production at the Large Hadron Collider (LHC) is driven by two important parameters: the center of mass energy and the luminosity. The luminosity is a measure of how many collisions happen in an accelerator per second and area. An accurate measurement of the luminosity at the LHC is an important objective for the ATLAS experiment and high precision of the luminosity measurement is essential to fulfill the ATLAS physics goals. The luminosity measurement with the track-counting method requires high and stable efficiencies for the selection of tracks in the Inner Detector of ATLAS. The reconstructed and selected charged particle tracks use mainly information from the silicon pixel and strips detectors in ATLAS.

In this context, the tracking efficiencies for the track selections used in the track counting luminosity measurement using Z ->mumu events are calculated. The techniques used to calculate the tracking efficiencies and the first look at the ATLAS data from 2018 will be shown in this presentation.