The azimuthal distributions of charged particles produced in Au+Au collisions at 11.5 A· GeV/c have been analyzed relative to the reaction plane orientation using the E877 experimental setup at the AGS. Details of the calibration procedures, data reduction and analysis methods are presented. With the event-by-event reconstruction of the reaction plane, a Fourier expansion is used to describe the anisotropy in particle distribution. Directed and elliptic flows are quantified by the dipole and quadrupole Fourier coefficients. A method allowing the decoupling of these two effects is introduced. Elliptic flow signals of protons, deuterons, pi +, pi--, K+, K-- have been studied as a function of particle rapidity and transverse momentum for different centralities of the collision. Transition from in-plane to out-of-plane flow as a function of particle rapidity is observed for protons and deuterons. The dependence of elliptic flow on rapidity is suggested to be a good probe for the stud of the transient pressure in the collision. The first and second order azimuthal anisotropies of charged pions and kaons have been measured. A weak in-plane elliptic flow of charged pions is detected for the first time at the AGS. The experimental results have been compared with the predictions of the RQMD event generator run in cascade and mean field modes.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.35880 |
| Date | January 1998 |
| Creators | Filimonov, Kirill. |
| Contributors | Barrette, Jean (advisor), Mark, S. K. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001658586, proquestno: NQ50159, Theses scanned by UMI/ProQuest. |
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