1. 2004, Torino
Aram Kotzinian

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Aram Kotzinian

3. 2004, Torino
Aram Kotzinian

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Aram Kotzinian

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Aram Kotzinian

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Aram Kotzinian

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Aram Kotzinian

8. 2004, Torino
Aram Kotzinian

9. Details: frequently used expressions
2004, Torino
Aram Kotzinian

10. 2004, Torino
Aram Kotzinian

11. Leading quark distributions
For gluons we have
2004, Torino
Aram Kotzinian

12. QCD evolution
2004, Torino
Aram Kotzinian

13. Evolution equations
For flavor singlet combinations we have coupled equations:
2004, Torino
Aram Kotzinian

14. First momentum
2004, Torino
Aram Kotzinian

15. Data from CERN, SLAC & HERMES
2004, Torino
Aram Kotzinian

16. The isotopic SU(2) invariance of strong interactions,
We have two sum rules and can express
2004, Torino
Aram Kotzinian

17. Experiment:
2004, Torino
Aram Kotzinian

18. 2004, Torino
Aram Kotzinian

19. are determined as matrix elements of conserved currents and do not depend on
2004, Torino
Aram Kotzinian

20. Remember:
Spin “puzzle”: or
????
2004, Torino
Aram Kotzinian