Charged particle jet measurements with the ALICE experiment in proton-proton collisions at the LHC

Abstract

We present preliminary results of measurements of charged particle jet properties in proton-proton collisions at $\sqrt{s}$ = 7 TeV using the ALICE detector. Jets are reconstructed using $\mathrm{anti}-{\mathrm{k}}_{\mathrm{T}},{\mathrm{k}}_{\mathrm{T}}$ and SISCone jet finding algorithms with resolution parameter $R=0.4$ in the range of transverse momentum from 20 to 100 GeV/$c$ in the midrapidity region ($\midη\mid\textless$ 0.5). The uncorrected charged jet spectra obtained using the three different jet finders show good agreement. The data are compared to predictions from PYTHIA-Perugia0, PYTHIA-Perugia2011, and PHOJET. The mean charged particle multiplicity in leading jets increases with increasing jet $p_{\mathrm{T}}$ and is consistent with model predictions. The radial distributions of transverse momentum about the jet direction and the distributions of the average radius containing 80% of the total jet $p_{\mathrm{T}}$ found in the jet cone ($R=0.4$ in this analysis), indicate that high $p_{\mathrm{T}}$ jets are more collimated than low $p_{\mathrm{T}}$ jets.

6 pages, 6 figures, Conference Proceedings submitted for the 28th Winter Workshop on Nuclear Dynamics, Puerto Rico, April 7-14, 2012

References in corpus (2)

• PYTHIA 6.4 Physics and Manual
• A practical Seedless Infrared-Safe Cone jet algorithm

Cited by in corpus (2)

• Jet measurements in proton-proton collisions with the ALICE experiment at LHC
• Soft interactions in jet quenching