Open Access Dissertation
Date of Award
Physics and Astronomy
At the Relativistic Heavy Ion Collider a hot and dense matter is produced in Au+Au collisions at sqrt(sNN) = 200 GeV/c. This matter exhibits features of a new deconfined partonic matter, called the Quark-Gluon Plasma. Charm quarks are expected to be produced predominately from the initial gluon fusion in parton-parton hard scatterings. This indicates that the production of the charm occurs at the early stages of the collision. At this time the system is thought to be partonic, making the charm a powerful probe of the initial conditions. Non-photonic electron measurements in p+p, d+Au, and Au+Au provide some insight of the heavy favor spectrum. However, because of incomplete kinematics, there is an uncertainty in the relative fraction of charm and bottom. A direct measurement of charm through hadronic channels could resolve this.
In this thesis, we present preliminary results from actual neutral and charged D-meson measurements in minimum bias Au+Au collisions at sqrt(sNN) = 200 GeV at STAR using existing silicon detectors (SVT and SSD). The measurements are performed using a secondary vertexing technique that exploits the resolution given by the silicon detectors available in STAR. We will study D-meson yields, significances, and discuss the possible physics implications.
Lapointe, Sarah, "D meson reconstruction at star using the silicon vertex tracker (svt)" (2010). Wayne State University Dissertations. Paper 247.