04102nam 22007215 450 991030039790332120200701101023.04-431-54616-210.1007/978-4-431-54616-0(CKB)3710000000118093(EBL)1731490(OCoLC)884585333(SSID)ssj0001244353(PQKBManifestationID)11690105(PQKBTitleCode)TC0001244353(PQKBWorkID)11314924(PQKB)11628935(MiAaPQ)EBC1731490(DE-He213)978-4-431-54616-0(PPN)178785296(EXLCZ)99371000000011809320140521d2014 u| 0engur|n|---|||||txtccrLongitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized p + p Collisions at √s = 200 GeV[electronic resource] /by Katsuro Nakamura1st ed. 2014.Tokyo :Springer Japan :Imprint: Springer,2014.1 online resource (151 p.)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053"Doctoral Thesis accepted by Kyoto University, Japan."4-431-54615-4 Includes bibliographical references at the end of each chapters.Nucleon Spin Physics -- Experimental Setup -- Electron Analysis -- Results -- Discussion -- Conclusion.In this thesis, the measurement of double-spin asymmetry for electron production from heavy flavor decays was performed in a Relativistic Heavy Ion Collider (RHIC) in the PHENIX experiment at Brookhaven National Laboratory to measure the polarized parton distribution function of gluon in the small Bjorken x region (x~0.01).   For this experiment, for the first time a Hadron Blind Detector (HBD), which is a position-sensitive gas Cherenkov counter with Gas Electron Multiplier whose surface is evaporated by CsI, was employed. This HBD contributes to reducing the background from electron pairs produced by real and virtual photon conversion. Furthermore, the author develops a new analysis method for the background reduction, and the signal-to-background ratio is improved by a factor of roughly 2.0. Using the combination of the HBD and a new analysis method, the double-spin asymmetry of the electron production with transverse momentum ranging 0.5 < pT < 3.0 GeV/c is measured and confirmed to be zero-consistent within the limit of the statistical uncertainty of about 1%. This result identifies the constraint of the gluon polarization in the small Bjorken x region, a worldwide first.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Nuclear physicsHeavy ionsParticle accelerationPhysical measurementsMeasurement   Nuclear Physics, Heavy Ions, Hadronshttps://scigraph.springernature.com/ontologies/product-market-codes/P23010Particle Acceleration and Detection, Beam Physicshttps://scigraph.springernature.com/ontologies/product-market-codes/P23037Measurement Science and Instrumentationhttps://scigraph.springernature.com/ontologies/product-market-codes/P31040Nuclear physics.Heavy ions.Particle acceleration.Physical measurements.Measurement   .Nuclear Physics, Heavy Ions, Hadrons.Particle Acceleration and Detection, Beam Physics.Measurement Science and Instrumentation.539.72167Nakamura Katsuroauthttp://id.loc.gov/vocabulary/relators/aut792023MiAaPQMiAaPQMiAaPQBOOK9910300397903321Longitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized p + p Collisions at √s = 200 GeV1800478UNINA