Azimuthal Dependence of Pion Interferometry in Au+Au Collisions at a Center of Mass Energy of 130AGeV

 
 
 
 

Azimuthal Dependence of Pion Interferometry in Au+Au Collisions at a Center of Mass Energy of 130AGeV

Show full item record


Title: Azimuthal Dependence of Pion Interferometry in Au+Au Collisions at a Center of Mass Energy of 130AGeV
Author: Wells, Randall C
Description: The study of two-pion Bose-Einstein correlations provides a tool to extract both spatial and dynamic information regarding the freeze-out configuration of the emission region created in heavy ion collisions. Noncentral heavy ion collisions are inherently spatially and dynamically anisotropic. The study of such collisions through the φ dependence of the HBT radii, R ij ^2 , relative to the event plane allows one to observe the source from all angles, leading to a richer description of the interplay between geometry and dynamics. The initial heavy ion running of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory provided Au + Au collisions at 130GeV. The focus of the heavy ion program at RHIC is the search for a new state of strongly interacting matter, the quark gluon plasma (QGP). STAR is a large acceptance detector at RHIC with azimuthal symmetry, allowing the study of a large variety of observables on an event-by-event basis to provide a better characterization of the freeze-out conditions. The detector geometry for the first year's data consisted of a time projection chamber (TPC) immersed in a 0.25T magnetic field oriented along the symmetry axis to provide identification of particles with transverse momenta p T ≥100MeV/c. The focus of this dissertation is the study of the φ dependence of the transverse HBT radii from π - π - and π ^+ π ^+ correlations in non-central collisions. 2 nd order oscillations are observed in all transverse radii (R o ^2 (φ), R s ^2 (φ), and R os ^2 (φ)). The oscillations are found to be consistent in phase and magnitude to both RQMD and hydrodynamic predictions, yet both models (over)underpredict (R o ^2 )R s ^2 whose relative size indicates a short emission time-scale. A modified blast wave prameterization is successful at reproducing a variety of observables at RHIC (i.e. particle spectra, v 2 (p T ), R ij ^2 (p T ), and R o,s,os ^2 (φ)) with a univeral set of freeze-out parmeters. The results describe a freeze-out geometry extended out-of-plane indicative of a short source life-time.
Permanent Link: http://rave.ohiolink.edu/etdc/view?acc_num=osu1038954208
http://hdl.handle.net/2374.OX/6327
Date: 2002

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show full item record