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

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We review the study the Wandzura-Wilczek relation for the structure function g_2, 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 g_2, which indicate a breaking of the order 20-40%, and how to individually measure the twist-3 terms.
Talk given by Alberto Accardi at "Spin structure at long distances," Jefferson Lab, March 12-13 2009

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/230812

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0905.3118
 http://arxiv.org/abs/0905.3118

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arXiv