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arxiv: 1011.1213 · v2 · pith:G7C4NLWAnew · submitted 2010-11-04 · ✦ hep-lat · hep-ph

Exploring quark transverse momentum distributions with lattice QCD

Bernhard U. Musch (1) , Philipp H\"agler (2 , 4) , John W. Negele (3) , Andreas Sch\"afer (4) ((1) Jefferson Lab , (2) Technische Universit\"at M\"unchen , (3) Massachusetts Institute of Technology , (4) Universit\"at Regensburg) This is my paper
classification ✦ hep-lat hep-ph
keywords momentumquarktmdstransverselatticeresultsallowingasqtad-improved
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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 bi-local 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 transverse momentum. Our calculations are based on domain wall valence quark propagators by the LHP collaboration calculated on top of gauge configurations provided by MILC with 2+1 flavors of asqtad-improved staggered sea quarks.

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