Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Instrumentation IV

HK 16.4: Talk

Tuesday, March 28, 2017, 12:15–12:30, F 072

Tracklet-based PID for the ALICE TRD Upgrade for LHC RUN 3 — •Hannah Klingenmeyer for the ALICE collaboration — Physikalisches Institut, University of Heidelberg

The purpose of the Transition Radiation Detector (TRD) at the Large Hadron Collider (LHC) is to provide electron identification as well as particle tracking in the central barrel of A Large Ion Collider Experiment (ALICE). For the upgrade programme of the TRD for LHC RUN 3, the read-out of online-processed track segments instead of raw clusters in order to reduce the data volume and increase the read-out speed is foreseen. These so-called tracklets contain information about position, incident angle and particle identification (PID), written to a 32-bit word. The challenge of a tracklet-only read-out in terms of PID will be to ensure the highest performance possible with the bit size available in the tracklet word. In this talk, the current state of a tracklet-based PID approach to be used in LHC RUN 3 is discussed. A multi-dimensional likelihood method is applied to the tracklet data, enabling the extraction of the pion rejection for a given electron efficiency as a means of judging the quality of the PID performance.