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1995•arXiv (Cornell University)Open access

Nucleon Spin Structure. Sum Rules

B.L. Ioffe

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Abstract

Contents: 1. The sum rules or $Γ_{p,n}$.Theoretical status. 2. Calculations of matrix elements over the polarized nucleon by the QCD sum rule approach. 3. Twist-4 corrections to $Γ_{p,n}$ from QCD sum rules. 4. Gerasimov, Drell-Hearn (GDH) sum rules. The estimate of higher twist corrections to $Γ_{p,n}$ using interpolation between $Γ_{p,n}$ and GDH sum rules. 5. Comparison with experiment. 6. The calculations of polarized structure functions by the QCD sum rule method. 7. Calculation of the chirality violating structure function $h_1(x)$ by QCD sum rules. 8. Conclusions.

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Contents: 1. The sum rules or $Γ_{p,n}$.Theoretical status. 2. Calculations of matrix elements over the polarized nucleon by the QCD sum rule approach. 3. Twist-4 corrections to $Γ_{p,n}$ from QCD sum rules. 4. Gerasimov, Drell-Hearn (GDH) sum rules. The estimate of higher twist corrections to $Γ_{p,n}$ using interpolation between $Γ_{p,n}$ and GDH sum rules. 5. Comparison with experiment. 6. The calculations of polarized structure functions by the QCD sum rule method. 7. Calculation of the chirality violating structure function $h_1(x)$ by QCD sum rules. 8. Conclusions.

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Available abstract

Contents: 1. The sum rules or $Γ_{p,n}$.Theoretical status. 2. Calculations of matrix elements over the polarized nucleon by the QCD sum rule approach. 3. Twist-4 corrections to $Γ_{p,n}$ from QCD sum rules. 4. Gerasimov, Drell-Hearn (GDH) sum rules. The estimate of higher twist corrections to $Γ_{p,n}$ using interpolation between $Γ_{p,n}$ and GDH sum rules. 5. Comparison with experiment. 6. The calculations of polarized structure functions by the QCD sum rule method. 7. Calculation of the chirality violating structure function $h_1(x)$ by QCD sum rules. 8. Conclusions.

Key concepts: Sum rule in quantum mechanics, QCD sum rules, Nucleon, Physics, Particle physics, Quantum chromodynamics, Structure function, Twist

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