scholarly journals New COMPASS results on the proton spin-dependent structure function $g_1^p$

2013 ◽  
Author(s):  
Vincent Andrieux
Keyword(s):  
Structure Function ◽  
Proton Spin

scholarly journals Measurement of the proton spin structure function g1p with a pure hydrogen target

1998 ◽  
Vol 442 (1-4) ◽  
pp. 484-492 ◽  
Author(s):  
A. Airapetian ◽  
N. Akopov ◽  
I. Akushevich ◽  
M. Amarian ◽  
E.C. Aschenauer ◽  
...  
Keyword(s):  
Structure Function ◽  
Spin Structure ◽  
Proton Spin ◽  
Pure Hydrogen ◽  
Spin Structure Function ◽  
Hydrogen Target ◽  
Proton Spin Structure

scholarly journals Polarized Deep Inelastic Scattering

1997 ◽  
Vol 50 (1) ◽  
pp. 71
Author(s):  
F. M. Steffens ◽  
A. W. Thomas
Keyword(s):  
Inelastic Scattering ◽  
Structure Function ◽  
Spin Structure ◽  
Good Description ◽  
Proton Spin ◽  
Spin Structure Function ◽  
Sum Rule ◽  
Axial Anomaly ◽  
Proton Spin Structure ◽  
Polarized Deep Inelastic Scattering

We give an overview of present calculations involving the proton spin structure function. It is shown that a significant part of the discepancy between the data and the Ellis–Jaffe sum-rule may arise through the axial anomaly if the gluons within the proton are strongly polarized. While a quark model, such as the MIT bag, does not include the anomaly, and therefore cannot be expected to reproduce the spin structure function, it does give a rather good description of recent data which is anomaly free, such as the distribution of polarized, valence up-quarks in the proton.

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