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5 papers · 2 filters
Quark correlations and single-spin asymmetries
Matthias Burkardt
We illustrate, in a semi-classical picture, how the Wilson line phase factor in gauge invariantly defined unintegrated parton density can lead to a nonzero single-spin asymmetry (S…
Non-abelian dynamics in first-order cosmological phase transitions
Mikkel B. Johnson, L. S. Kisslinger, E. M. Henley +2
Bubble collisions in cosmological phase transitions are explored, taking the non-abelian character of the gauge fields into account. Both the QCD and electroweak phase transitions…
Sivers Mechanism for Gluons
Matthias Burkardt
We study T-odd gauge invariantly defined T-odd unintegrated gluon densities in QCD. The average momentum of the gluons in a polarized nucleon can be nonzero due to…
Generalized Parton Distributions for large
Matthias Burkardt
The -dependence of generalized parton distrbutions for is discussed. We argue that constituent quark models, where the -dependence for is through the produc…
Color Transparent GPDs?
Matthias Burkardt, Gerald A. Miller
The relation between GPD's and color transparency is explored. The discovery of color transparency in pionic diffractive dissociation reactions allows us to make specific predictio…