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Showing 1 to 8 of 8 for “"gluon polarization"”.
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Feasibility study on extracting the gluon polarization in Di-Jet production in polarized pp collisions at RHIC
… program is the determination of the polarized gluon distribution function through a measurement of the longitudinal double-spin asymmetry, ALL, for various processes. Di-Jet production is of particular interest since it allows a direct access of the underlying partonic kinematics, in particular …
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Gluon polarization in the proton: constraints at low x from the measurement of the double longitudinal spin asymmetry for forward-rapidity hadrons with the PHENIX detector at RHIC
… of how to account for the remaining spin. As gluons carry roughly 50\% of the proton's momentum, it seemed most logical to look to the gluon spin as another significant contributor. However, lepton-nucleon scattering experiments only access the gluon helicity distribution, $\Delta g$, through …
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Measurement of longitudinal double spin asymmetries of [pi]+/- production in p[over-arrow] + p[over-arrow] collisions at [sqrt]s = 200 GeV at RHIC
… to study [Delta]g, the helicity distribution of gluons in the nucleon. In particular, the unique polarized proton collider at RHIC enables a class of asymmetry measurements that are directly sensitive to gluon polarization. The STAR experiment at RHIC measures the double spin asymmetry …
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Dijet production in polarized proton-proton collisions at [the square root of sigma] = 200 GeV
… possible to make an extraction of the polarized gluon distribution function [delta]g(x). This function describes the contribution of the gluon polarization to the proton spin. This thesis presents a measurement of the p + p ---> Jet + Jet + X (dijet) cross section from the 2005 RHIC running …
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The radiance of the gluon spin : constraining the proton spin structure with the direct photon double helicity asymmetry
… uncovered a surprisingly inadequate quark polarization, necessitating significant contributions to the proton spin from elsewhere. The total spin of the gluon field confining the quarks is one possibility, but a contribution only weakly constrained by the electromagnetic probes of DIS. An …
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Inclusive jet and dijet production in polarized proton-proton collisions at [the square root of sigma] =200 GeV at RHIC
… based on various parametrizations of polarized gluon distributions of the proton. The results are inconsistent with large gluon polarization and expected to lead to a constrain on the polarized gluon distribution.
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A Common Readout Driver for the COMPASS Experiment
… COMPASS experiment is the determination of the gluon polarization DeltaG/G. <br>To achieve this goal, particles produced in the muon-nucleon scattering process have to be detected. <br>For this measurements particle identification has to be provided as well as track reconstruction over a wide …
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UNRAVELING THE NUCLEON 3D STRUCTURE FROM EXPERIMENT, LATTICE, AND GLOBAL ANALYSIS
… $g_T(x)$, the less-studied but known transverse gluon polarization density $\Delta G_T(x)$, and quark and gluon canonical orbital angular momentum densities associated with transverse polarization. This is the counterpart of the sum rule for the longitudinal spin of the proton derived by Jaffe …