“Mini-jet Clusters and Mini-Dijet Clusters in High-Energy pp Collisions” by Cheuk-Yin Wong (Oak Ridge National Laboratory)

Thursday, March 1, 2018 - 1:30pm to 2:30pm
Nuclear Physics Seminar

Mini-jets and mini-dijets provide useful information on multiple parton interactions in the low-pT region. We attempt to develop a clustering algorithm to identify minijets by using the k-means clustering method, with a cluster-number selection principle. Upon testing the algorithm using minimum-bias events generated by PYTHIA, for pp collision at \sqrt{s}=200 GeV, we find that multiple mini-jet-like and mini-dijet-like clusters of low-$p_T$ hadrons occur in high multiplicity events. However similar clustering properties are also present for particles produced randomly in a finite pseudorapidity and azimuthal angle space. The ability to identify mini-jets and mini-dijets may need to depend on the additional independent assessment of the dominance of the parton-parton hard-scattering process in the low-pT region.

Event Attachments: 
Knudsen 4-134