We review the study the Wandzura-Wilczek relation for the structure function g2, with a particular attention on the connection with the framework of Transverse Momentum Dependent factorization.We emphasize that the relation is broken by two distinct twist-3 terms. In the light of these findings, we clarify what can be deduced from the available experimental data on g2, which indicate a breaking of the order 20-40%, and how to individually measure the twist-3 terms.

What can we learn from the breaking of the Wandzura-Wilczek relation?

BACCHETTA, ALESSANDRO;
2009-01-01

Abstract

We review the study the Wandzura-Wilczek relation for the structure function g2, with a particular attention on the connection with the framework of Transverse Momentum Dependent factorization.We emphasize that the relation is broken by two distinct twist-3 terms. In the light of these findings, we clarify what can be deduced from the available experimental data on g2, which indicate a breaking of the order 20-40%, and how to individually measure the twist-3 terms.
2009
9780735406926
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/201861
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