Notice bibliographique
- Notice
Type(s) de contenu et mode(s) de consultation : Texte noté : électronique
Auteur(s) : Nakamura, Katsuro
Titre(s) : Longitudinal double-spin asymmetry of electrons from heavy flavor decays in polarized p + p collisions at√s=200GeV [Texte électronique] : 200 GeV / Katsuro Nakamura
Publication : Tokyo : Springer, 2014
Description matérielle : 1 online resource (xvi, 141 pages)
Collection : Springer theses
Lien à la collection : Springer theses (Internet)
Note(s) : "Doctoral thesis accepted by Kyoto University, Japan.". - Includes bibliographical references. - Online resource; title from PDF title page (SpringerLink, viewed June 17, 2014).
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
Sujet(s) : Particules lourdes (physique)
Symétrie (physique)
Physique
Indice(s) Dewey :
539.757 (23e éd.) = Collision (physique nucléaire) ; 539.709 2 (23e éd.) = Physique atomique et nucléaire - Biographie
Identifiants, prix et caractéristiques : ISBN 9784431546160
Identifiant de la notice : ark:/12148/cb44717976v
Notice n° :
FRBNF44717976
(notice reprise d'un réservoir extérieur)
Table des matières : Nucleon Spin Physics ; Experimental Setup ; Electron Analysis ; Results ; Discussion
; Conclusion.
