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T: Teilchenphysik

T 207: Höhere Ordnungen

T 207.8: Talk

Friday, March 4, 2005, 15:45–16:00, TU H2037

Twist-2 Compton operator and its hidden structure: Wandzura-Wilczek-, Callan-Gross- and other relations — •Bodo Geyer¹ and Dieter Robaschik² — ¹Institut f. Theoret. Physik, Univ. Leipzig, Augustusplatz 10-11 — ²Fakultät f. Physik, Brandenburg. Techn. Univ., Cottbus

We show that the group theoretic structure of the Compton operator at leading geometric twist-2 allows, among other relations, to derive, without any approximation and using no dynamical input, operator versions of the Wandzura-Wilczek and the (power corrected) Callan-Gross relations. Their functional form is exactly the same as for deep inelastic (as well as deeply virtual Compton) scattering.