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dc.contributor.advisorMignerey, Alice C.en_US
dc.contributor.authorRichardson, Ericen_US
dc.date.accessioned2012-10-11T05:34:50Z
dc.date.available2012-10-11T05:34:50Z
dc.date.issued2012en_US
dc.identifier.urihttp://hdl.handle.net/1903/13129
dc.description.abstractForward rapidity elliptic flow (v<sub>2</sub>) of both unidentified charged hadrons and decay muons has been measured from &#8730;s<sub>NN</sub> = 200 GeV Au+Au collisions as a function of pseudorapidity (&#951;), transverse momentum, and number of nucleon collision participants. The measurements were performed at Brookhaven National Laboratory's Relativistic Heavy Ion Collider using the PHENIX experiment's Muon Arm spectrometers, located at 1.2 < |&#951;| &#1113089; 2.4. To identify hadrons, which consist mostly of pions, kaons, and protons, a longitudinal momentum cut was applied to tracks stopping in the shallow steel layers of the Muon Arms. Those particles traversing completely through the Muon Arms consist of mostly muons from pion and kaon decays. The standard event plane (EP) method was used to measure v<sub>2</sub>, whose accuracy was improved &#8764;20-25% by combining the measured EP angles of several detectors, instead of using the measured EP from a single detector. Additionally, a hit swapping technique was devised to optimize track cuts, estimate background, and apply a background correction. To investigate the ability of the Muon Arms to accurately measure unidentified hadron v<sub>2</sub>, a GEANT simulation was also undertaken. The forward rapidity v<sub>2</sub> results show good agreement with mid-rapidity measurements for central collisions (&#1113089; 20-30% centrality), indicating a longitudinally extended thermalized medium with similar eccentricity, at least out to the Muon Arm &#951; region. Only when compared to very forward BRAHMS measurements (&#951; &#8776; 3) is a v<sub>2</sub> suppression seen for central collisions. For increasingly peripheral collisions, a growing suppression in v<sub>2</sub> is observed for the Muon Arm measurements compared to mid-rapidity, indicating increased changes in the medium properties of ever smaller systems. For peripheral collisions of the same/similar centralities, an increased suppression is observed toward forward &#951;.en_US
dc.titleElliptic flow at forward rapidity in sqrt(s_(NN)) = 200 GeV Au+Au collisionsen_US
dc.typeDissertationen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentChemistryen_US
dc.subject.pqcontrolledNuclear chemistryen_US
dc.subject.pqcontrolledNuclear physicsen_US
dc.subject.pqcontrolledParticle physicsen_US
dc.subject.pquncontrolledAzimuthal anisotropyen_US
dc.subject.pquncontrolledElliptic flowen_US
dc.subject.pquncontrolledForward rapidityen_US
dc.subject.pquncontrolledHeavy-ionsen_US
dc.subject.pquncontrolledPHENIXen_US
dc.subject.pquncontrolledRHICen_US


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