Typ

INT-Note

Gebiet

ATLAS

Autor

M. Jüngst, M. Schultens, S. Zimmermann

Titel

A time-over-threshold based approach for particle identification with the ATLAS TRT detector

Datum

2011-10

Reportnummer

ATL-COM-INDET-2011-103

Kurzfassung

The possibility of a general TRT variable to measure dE/dx for several possible applications will be shown. For four definitions of Time-Over-Threshold and various degrees of freedom in the dE/dx definition the bias in the energy loss measurement was studied. For all definitions corrections on hit-level were determined, separately for data and MC. The measured dE/dx is parametrized by a physically motivated function. It can be used for further studies, for the definition of separation power and for the interpretation as a likelihood hypothesis or a mass measurement. Additionally, the dependence of the resolution on parameters like the number of used hits will be shown and explained. The knowledge of the expected dE/dx and its uncertainty is implemented in an ATHENA tool which can contribute to the particle identification in the wide range of low mass to very high mass particles.

Link

CDS Record 1388223