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Probing the Orbital Angular momentum through the Polarized Gluon Asymmetry

The orbital angular momentum is one of the least understood of the spin characteristics of a proton. There are no direct ways to model Lz. However, the Jz = 1 2 sum rule includes an angular momentum component and can provide indirect access to properties of Lz. One of the other unknowns in the sum rule is the gluon polarization, ∆G. We can define the gluon spin asymmetry in a proton as A(x,Q2) ...

study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...

Interplay of spin and orbital angular momentum in the proton.

We derive the consequences of the Myhrer-Thomas explanation of the proton spin problem for the distribution of orbital angular momentum on the valence and sea quarks. After QCD evolution, these results are found to be in very good agreement with both recent lattice QCD calculations and the experimental constraints from Hermes and JLab.

Novel Detection of Optical Orbital Angular Momentum

Probing Parton Orbital Angular Momentum in Longitudinally Polarized Nucleon

Xiangdong Ji, 2, 3 Xiaonu Xiong, 4 and Feng Yuan INPAC, Department of Physics, and Shanghai Key Lab for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China Center for High-Energy Physics, Peking University, Beijing, 100080, P. R. China Maryland Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742, USA Nuclear Science Divis...