TRANSVERSE MOMENTUM-DEPENDENT PARTON DISTRIBUTIONS FROM LATTICE QCD

6533b7d8fe1ef96bd126a1f1

RESEARCH PRODUCT

TRANSVERSE MOMENTUM-DEPENDENT PARTON DISTRIBUTIONS FROM LATTICE QCD

P. Hägler B. Musch Michael Engelhardt John W. Negele Andreas Schäfer

subject

Quark Physics Particle physics High Energy Physics::Lattice Lorentz transformation High Energy Physics::Phenomenology Observable Parton Lattice QCD Deep inelastic scattering Transverse plane symbols.namesake Lattice (order)symbols High Energy Physics::Experiment

description

Starting from a definition of transverse momentum-dependent parton distributions for semi-inclusive deep inelastic scattering and the Drell-Yan process, given in terms of matrix elements of a quark bilocal operator containing a staple-shaped Wilson connection, a scheme to determine such observables in lattice QCD is developed and explored. Parametrizing the aforementioned matrix elements in terms of invariant amplitudes permits a simple transformation of the problem to a Lorentz frame suited for the lattice calculation. Results for the Sivers and Boer-Mulders transverse momentum shifts are presented, focusing in particular on their dependence on the staple extent and the Collins-Soper evolution parameter.

year	journal	country	edition	language
2012-01-01	International Journal of Modern Physics: Conference Series

https://doi.org/10.1142/s2010194512009191

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