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EnglishWe analyze the breaking of the Wandzura-Wilczek relation for the g(2) structure function, emphasizing its connection with transverse momentum dependent parton distribution functions. We find that the relation is broken by two distinct twist-3 terms, and clarify how these can be separated in measurements of double-spin asymmetries in semi-inclusive deep inelastic scattering. Through a quantitative analysis of available g(2) data we also show that the breaking of the Wandzura-Wilczek relation can be as large as 15-40% of the size of g(2).
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| Titolo: | What can break the Wandzura-Wilczek relation? | |
| Autori: | ||
| Data di pubblicazione: | 2009 | |
| Rivista: | ||
| Abstract: | We analyze the breaking of the Wandzura-Wilczek relation for the g(2) structure function, emphasizing its connection with transverse momentum dependent parton distribution functions. We find that the relation is broken by two distinct twist-3 terms, and clarify how these can be separated in measurements of double-spin asymmetries in semi-inclusive deep inelastic scattering. Through a quantitative analysis of available g(2) data we also show that the breaking of the Wandzura-Wilczek relation can be as large as 15-40% of the size of g(2). | |
| Handle: | http://hdl.handle.net/11571/206864 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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