arXiv subjects

Thomas Dietel

Publications and source records attributed to Thomas Dietel.

2 recordsLinked to original sources

arXiv2011

Jets and Photons in ALICE

ALICE measured transverse momentum spectra of pi0 and eta mesons via the two photon decay in pp collisions at sqrt(s)=0.9, 2.76 and 7 TeV and Pb-Pb collisions at sqrt(sNN)=2.76 TeV. NLO pQCD calculations agree with p-p measurements at 0.9 TeV, but overestimate the data at 2.76 and 7 TeV. The nuclear modification factor for neutral pions shows a strong suppression of high-pt particle production in central Pb-Pb collisions. Raw spectra of charged particle jets have been measured in Pb-Pb collisions. Detailed studies of background fluctuations have been performed and will allow us to unfold the spectra even for low momentum cut offs, giving access to soft fragmentation products in quenched jets.

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arXiv2005

Azimuthal correlations of high-pT photons and hadrons in Au+Au collisions at RHIC

The measurement of gamma+jet events with a direct photon in coincidence with an energetic parton can provide unique insights into the propagation and fragmentation of the parton in the presence of the hot and dense medium created in heavy-ion collisions. One way to explore these effects is the study of azimuthal correlations between the direct photon and hadrons produced in the fragmentation. We present azimuthal correlations between photons with a transverse momentum of more than 10 GeV and charged hadrons with a transverse momentum of more than 2 GeV in Au+Au collisions at sqrt(s_NN) = 200 GeV that have been measured with the STAR detector at RHIC. The separation of correlations with direct photons and photons from hadronic decays will be discussed.

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