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100   $a20140521d2014      u|         0
101 0 $aeng
135   $aur|n|---|||||
181   $ctxt
182   $cc
183   $acr
200 10$aLongitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized p + p Collisions at ?s = 200 GeV /$fby Katsuro Nakamura
205   $a1st ed. 2014.
210  1$aTokyo :$cSpringer Japan :$cImprint: Springer,$d2014.
215   $a1 online resource (151 p.)
225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053
300   $a"Doctoral Thesis accepted by Kyoto University, Japan."
311   $a4-431-54615-4 
320   $aIncludes bibliographical references at the end of each chapters.
327   $aNucleon Spin Physics -- Experimental Setup -- Electron Analysis -- Results -- Discussion -- Conclusion.
330   $aIn this thesis, the measurement of double-spin asymmetry for electron production from heavy flavor decays was performed in a Relativistic Heavy Ion Collider (RHIC) in the PHENIX experiment at Brookhaven National Laboratory to measure the polarized parton distribution function of gluon in the small Bjorken x region (x~0.01).   For this experiment, for the first time a Hadron Blind Detector (HBD), which is a position-sensitive gas Cherenkov counter with Gas Electron Multiplier whose surface is evaporated by CsI, was employed. This HBD contributes to reducing the background from electron pairs produced by real and virtual photon conversion. Furthermore, the author develops a new analysis method for the background reduction, and the signal-to-background ratio is improved by a factor of roughly 2.0. Using the combination of the HBD and a new analysis method, the double-spin asymmetry of the electron production with transverse momentum ranging 0.5 < pT < 3.0 GeV/c is measured and confirmed to be zero-consistent within the limit of the statistical uncertainty of about 1%. This result identifies the constraint of the gluon polarization in the small Bjorken x region, a worldwide first.
410  0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053
606   $aNuclear physics
606   $aHeavy ions
606   $aParticle acceleration
606   $aPhysical measurements
606   $aMeasurement   
606   $aNuclear Physics, Heavy Ions, Hadrons$3https://scigraph.springernature.com/ontologies/product-market-codes/P23010
606   $aParticle Acceleration and Detection, Beam Physics$3https://scigraph.springernature.com/ontologies/product-market-codes/P23037
606   $aMeasurement Science and Instrumentation$3https://scigraph.springernature.com/ontologies/product-market-codes/P31040
615  0$aNuclear physics.
615  0$aHeavy ions.
615  0$aParticle acceleration.
615  0$aPhysical measurements.
615  0$aMeasurement   .
615 14$aNuclear Physics, Heavy Ions, Hadrons.
615 24$aParticle Acceleration and Detection, Beam Physics.
615 24$aMeasurement Science and Instrumentation.
676   $a539.72167
700   $aNakamura$b Katsuro$4aut$4http://id.loc.gov/vocabulary/relators/aut$0792023
801  0$bMiAaPQ
801  1$bMiAaPQ
801  2$bMiAaPQ
906   $aBOOK
912   $a9910300397903321
996   $aLongitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized p + p Collisions at ?s = 200 GeV$91800478
997   $aUNINA