Experimental Setup

Abstract

This analysis is based on the data which were taken at Relativistic Heavy Ion Collider (RHIC) with the PHENIX detector at Brookhaven National Laboratory (BNL) in the United States during the 2009 run. In this run, longitudinally polarized $p\,+\,p$ collisions at $\sqrt{s}=200$ GeV were performed for 10 weeks (April 19–June 29). The integrated luminosity used in this analysis after quality assurance (QA) of data is $\sim$6.1 pb$^{-1}$ and the average beam polarizations during this measurement are $\sim$56 % for the Blue beam and $\sim$57 % for the Yellow beam. For the heavy flavor electron measurement at PHENIX, a new detector called “hadron blind detector” (HBD), which started to be operated from this run, is the most important detector to reject the photonic electron background in this analysis. Since it was the first operation of HBD for physics measurement, a new analysis frameworks of HBD was developed in this work and was used in this measurement. In this chapter, RHIC is introduced in Sect. 2.1 and the PHENIX detector system used in this analysis is explained in Sect. 2.2. The detailed description of the HBD is also in Sect. 2.2. The PHENIX trigger system and DAQ is described in Sect. 2.3.