Mapping the Transverse Nucleon Spin
Daniel Boer
Abstract
The transverse nucleon spin can be transferred to the quarks and gluons in several ways. In the factorizing, hard scattering processes to be considered, these are parameterized at leading twist by the transversity distribution function and at next-to-leading twist by quark-gluon correlation functions. The latter enter the description of the structure function g2 and possibly of single spin asymmetries. It is discussed what is known about these functions and what are the remaining open issues.
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