Two- and Three-Particle Jet-Like Correlations
| dc.creator | Ulery, Jason Glyndwr | |
| dc.date | 2008-01-31 | |
| dc.date | 2008-02-18 | |
| dc.date.accessioned | 2026-07-07T09:21:07Z | |
| dc.date.available | 2026-07-07T09:21:07Z | |
| dc.description | We present results of 2-particle jet-like correlations, with high pT h+- triggers and identified pi+-, p, and pbar triggers in d+Au and Au+Au collisions and 3-particle jet-like azimuthal correlations in pp, d+Au, and Au+Au collisions at sqrt(s)=200 GeV. These results use data from the STAR TPC during RHIC runs II, III, and IV. Modifications in 2-particle correlations are observed in Au+Au collisions. These modifications are not seen in $pp$ or d+Au collisions. This demonstrates that the modifications are due to final state nuclear effects. High pT protons, anti-protons and charged pions are identified by the relativistic rise of dE/dx in the STAR TPC. Correlations of charged hadrons with high pT p, pbar, and pi+- show no discernible difference. The results post challenges to recombination and coalescence models which are otherwise very successful in explaining the large baryon/meson ratio and the splitting of the elliptic flow at intermediate pT. In central Au+Au collisions, the away-side 2-particle correlation is significantly broadened and even double humped in selective kinematic ranges. Three-particle correlations were employed to identify the underlying physics mechanism(s). Results in pp, d+Au and peripheral Au+Au collisions show dijet structure with away-side kT broadening. Results in mid-central and central Au+Au collisions are consistent with a near-side jet and on the away-side a combination of conical emission and large angle gluon radiation and deflected jets. The associated pT independent emission angle suggests Mach-cone shock waves being the underlying physics mechanism for the conical emission. The emission angle is measured to be 1.39+-0.01 (stat.)+-0.04(sys.) in ZDC triggered 0-12% Au+Au data. | |
| dc.description | Ph.D. Thesis submitted to Purdue University. Some plots replotted to reduce size. Original version at http://amdahl.physics.purdue.edu/~ulery/Thesis/thesis_submit.pdf | |
| dc.identifier | https://arxiv.org/abs/0801.4904 | |
| dc.identifier | http://arxiv.org/abs/0801.4904 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/154910 | |
| dc.subject | Nuclear Experiment | |
| dc.title | Two- and Three-Particle Jet-Like Correlations | |
| dc.type | text |