Nuclear Physics Colloquium
Nuclear Physics Colloquium
Location: ITP, Science Campus Riedberg, Max-von-Laue-Str. 1, room 02.116
Time: Thursday, January 31, 2013, 16:30-17:30 (plus 10min for
discussion)
Contact: hees@fias.uni-frankfurt.de
ALICE has studied two-particle angular correlations in azimuthal direction induced by low energetic di-jets produced in proton-proton collisions [1,2]. Using two-particle angular correlations with low transverse momentum thresholds, jet properties on a statistical basis down to the lowest possible jet energies are measured. The presented results allow to optimize the parametrization of the jet fragmentation in theoretical models down to low energies into the non-perturbative regime. Furthermore, the analysis can give information about the contribution from multiple parton interactions. Results are presented from proton-proton collisions at the center-of-mass energies √s= 0.9, 2.76, and 7.0 TeV recorded by the ALICE detector. Our results are compared to Pythia6, Pythia8, and Phojet simulations.
[1] E. Sicking [ALICE Collaboration], ``Multiplicity Dependence of
Two-Particle
Correlations in Proton-Proton Collisions Measured with ALICE at the LHC,''
arXiv:1209.4178 [hep-ex].
[2] E. Sicking, ``Multiplicity Dependence of Two-Particle Angular
Correlations
in Proton-Proton Collisions Measured with ALICE at the LHC,''
CERN-THESIS-2012-210.