Transverse Momentum-Dependent Parton Distributions From Lattice QCD
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1057545
- Report Number(s):
- JLAB-THY-12-1668; DOE/OR/23177-2402
- Journal Information:
- International Journal of Modern Physics: Conference Series, Vol. 20; Conference: QCD Evolution Workshop, Jefferson Lab, Newport News, VA, 14-17 May 2012
- Country of Publication:
- United States
- Language:
- English
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