Higher twist analysis of the proton g 1 structure function

2004/04/30 by M. Osipenko, W. Melnitchouk, Wally Melnitchouk +10 · 23 citations
Chemistry · Mathematics · Physics and Astronomy · #Advanced NMR Techniques and Applications #Geometry #Mathematics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Twist #hep-ex #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.physletb.2005.01.071

published in Physics Letters B 609(3-4), 259-264 (Elsevier BV) · 6 pages, 2 figures, to appear in Phys. Lett. B

arxiv created 2005/01/13 · openalex publication_date 2005/02/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We perform a global analysis of all available spin-dependent proton structure function data, covering a large range of Q², 1 < Q² < 30 GeV², and calculate the lowest moment of the g₁ structure function as a function of Q². From the Q² dependence of the lowest moment we extract matrix elements of twist-4 operators, and determine the color electric and magnetic polarizabilities of the proton to be χ_E = 0.026 +- 0.015 (stat) + 0.021/-0.024 (sys) and χ_B = -0.013 -+ 0.007 (stat) - 0.010/+0.012 (sys), respectively.

Citations

• Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2
• Evidence for Quark-Hadron Duality in the Proton Spin AsymmetryA1
• Positivity constraints and flavor dependence of higher twists
• Renormalization of Twist-Four Operators in QCD Bjorken and Ellis–Jaffe Sum Rules

Cited by

• Moments of the spin structure functions g1p and g1d for 0.05<Q2<3.0 GeV2