Exploring quark transverse momentum distributions with lattice QCD

• Main Authors: Musch, B. U. (Author), Hagler, Ph (Author), Negele, John W. (Contributor), Schafer, A. (Author)
• Other Authors: Massachusetts Institute of Technology. Center for Theoretical Physics (Contributor), Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2011-11-14T15:28:55Z.
• Subjects: Article
• Online Access: Get fulltext

We discuss in detail a method to study transverse momentum dependent parton distribution functions (TMDs) using lattice QCD. To develop the formalism and to obtain first numerical results, we directly implement a bilocal quark-quark operator connected by a straight Wilson line, allowing us to study T-even, "process-independent" TMDs. Beyond results for x-integrated TMDs and quark densities, we present a study of correlations in x and k⊥. Our calculations are based on domain wall valence quark propagators by the LHP Collaboration calculated on top of gauge configurations provided by the MILC Collaboration with Nf=2+1 asqtad-improved staggered sea quarks.
Deutsche Forschungsgemeinschaft (Emmy Noether Programme)
Deutsche Forschungsgemeinschaft (cluster of excellence ''Origin and Structure of the Universe'' of the DFG, SFB/TRR-55)
United States. Dept. of Energy (Grant No. DEFG02- 94ER40818)
United States. Dept. of Energy (Contract No. DE-AC05- 06OR23177)
Thomas Jefferson National Accelerator Facility (U.S.)