THEORETICAL ASPECTS OF SPIN PHYSICS
THEORETICAL ASPECTS OF SPIN PHYSICS
A summary is given of how spin enters in collinearly factorizing processes. Next, theoretical aspects of polarization in processes beyond collinear factorization are discussed in more detail, with special focus on recent developments concerning the color gauge invariant definitions of transverse momentum dependent distribution and fragmentation functions, such as the Sivers and Collins effect functions. This has particular relevance for azimuthal single spin asymmetries, which currently receive much theoretical and experimental attention.
10 pages, 11 eps figures; Talk presented at the Ringberg Workshop `New Trends in HERA Physics 2003', Ringberg Castle, Tegernsee, Germany, September 28 - October 3, 2003
- Deutsches Elektronen-Synchrotron DESY Germany
- Vrije Universiteit Amsterdam Netherlands
electron p: deep inelastic scattering, polarization, hadron: hadroproduction, talk: Tegernsee 2003/09/28, angular distribution: asymmetry, electron p: inclusive reaction, FOS: Physical sciences, structure function: spin, p p: inclusive reaction, hadron: electroproduction, effect: higher-twist, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), factorization, quantum chromodynamics, polarization: transverse, quark: transverse momentum, quark: polarization, spin: asymmetry
electron p: deep inelastic scattering, polarization, hadron: hadroproduction, talk: Tegernsee 2003/09/28, angular distribution: asymmetry, electron p: inclusive reaction, FOS: Physical sciences, structure function: spin, p p: inclusive reaction, hadron: electroproduction, effect: higher-twist, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), factorization, quantum chromodynamics, polarization: transverse, quark: transverse momentum, quark: polarization, spin: asymmetry
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