Physics with the ALICE Transition Radiation Detector

TL;DR

The ALICE TRD enhances heavy-flavour and quarkonium measurements in high-energy collisions by providing electron identification, enabling new physics insights into the Quark-Gluon Plasma with improved accuracy and extended momentum range.

Contribution

This paper presents the first results of electron identification with the ALICE TRD in pp collisions at 7 TeV, extending the $p_{t}$ measurement range and reducing systematic uncertainties.

Findings

Successful electron identification in pp collisions at 7 TeV.

Extended $p_{t}$ measurement range from 4 to 10 GeV/c.

Application of TRD in J/ψ measurements in Pb-Pb collisions.

Abstract

The ALICE Transition Radiation Detector (TRD) significantly enlarges the scope of physics observables studied in ALICE, because it allows due to its electron identification capability to measure open heavy-flavour production and quarkonium states, which are essential probes to characterize the Quark-Gluon-Plasma created in nucleus-nucleus collisions at LHC. In addition the TRD enables to enhance rare probes due to its trigger contributions. We report on the first results of the electron identification capability of the ALICE Transition Radiation Detector (TRD) in pp collisions at $\sqrt{s}$ = 7 TeV using a one-dimensional likelihood method on integrated charge measured in each TRD chamber. The analysis of heavy flavour production in pp collisions at $\sqrt{s}$ = 7 TeV with this particle identification method, which extends the $p_{t}$ range of the existing measurement from $p_{t}$ = 4 GeV/c to 10 GeV/c and reduces the systematic uncertainty due to particle identification, is presented. The performance of the application of the TRD electron identification in the context of J/\psi measurements in Pb-Pb collisions is also shown.