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Measurement of Elliptic Flow Coefficients and Derivation of Reaction Plane Dependent Efficiency of Isolated Photons and π0 in Center-of-Mass Pair Energy 200 GeV Au+Au Collisions at RHIC-PHENIX

Danley, Tyler
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416500118

Abstract Details

2014, Master of Science (MS), Ohio University, Physics and Astronomy (Arts and Sciences).
This thesis presents measurements of second order flow coefficients and derivations of reaction plane dependent efficiencies of isolated photons and π0's in $\sqrt{s_{NN}} = 200\ GeV$ Au+Au collisions at RHIC-PHENIX. We used an isolation cut method similar to those used in direct photon identification where the energy is summed inside an angular cone and cut if greater than a threshold energy. We show that this will result in a reaction plane dependent efficiency. We derive azimuthal single and two particle correlation functions, including this efficiency, up to harmonic second order. These functions were then verified using a Monte Carlo program. Measurements were made in four centralities using the typical event plane method. We show that this method is only sensitive to ν2effective, which includes the sum of true ν2 and the ν2 of the isolation efficiency, which is generally negative. Hence, the measurements of ν2effective are generally smaller, even reaching negative values, than those previously observed for photons and π0's. A method for measuring the efficiency ν2 is presented, which is required in order to find the true isolated photon and π0 ν2.
Justin Frantz, Dr. (Advisor)
David Drabold, Dr. (Committee Chair)
Heather Crawford, Dr. (Committee Member)
84 p.
Particle Physics; Physics
PHENIX; elliptic flow; RHIC, Heavy Ion Collisions; Gold; flow;

Recommended Citations

Citations

  • Danley, T. (2014). Measurement of Elliptic Flow Coefficients and Derivation of Reaction Plane Dependent Efficiency of Isolated Photons and π0 in Center-of-Mass Pair Energy 200 GeV Au+Au Collisions at RHIC-PHENIX [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416500118

    APA Style (7th edition)

  • Danley, Tyler. Measurement of Elliptic Flow Coefficients and Derivation of Reaction Plane Dependent Efficiency of Isolated Photons and π0 in Center-of-Mass Pair Energy 200 GeV Au+Au Collisions at RHIC-PHENIX. 2014. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416500118.

    MLA Style (8th edition)

  • Danley, Tyler. "Measurement of Elliptic Flow Coefficients and Derivation of Reaction Plane Dependent Efficiency of Isolated Photons and π0 in Center-of-Mass Pair Energy 200 GeV Au+Au Collisions at RHIC-PHENIX." Master's thesis, Ohio University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416500118

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Ohio University and OhioLINK.