Single spin asymmetries and gluonic pole matrix elements

Details Single spin asymmetries and gluonic pole matrix elements Single spin asymmetries and gluonic pole matrix elements

2008-06-27

arxiv.org/abs/0806.4503v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, contribution to DIS2008 (April 2008), London (UK)

Scientific paper

We investigate the emergence of single spin asymmetries (SSA) in hard processes using transverse momentum dependent (TMD) distribution and fragmentation functions. Specifically, the description of SSA involves time reversal-odd functions. Process-dependence (non-universality) in measurements of SSA can be attributed to the non-trivial gauge link structure in the TMD correlator. Finding the appropriate gauge links, however, also enables us to characterize the non-universality

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