Sivers and Boer-Mulders observables from lattice QCD
Name
Negele-2012-Sivers and Boer-Mulders observables from.pdf
Size
1.3 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Musch, B. U.
Hagler, Ph.
Engelhardt, M.
Negele, John W.
Schafer, A.
Date Issued
May 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Musch, B. et al. “Sivers and Boer-Mulders Observables from Lattice QCD.” Physical Review D 85.9 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We present a first calculation of transverse momentum-dependent nucleon observables in dynamical lattice QCD employing nonlocal operators with staple-shaped, “process-dependent” Wilson lines. The use of staple-shaped Wilson lines allows us to link lattice simulations to TMD effects determined from experiment, and, in particular, to access nonuniversal, naively time-reversal odd TMD observables. We present and discuss results for the generalized Sivers and Boer-Mulders transverse momentum shifts for the SIDIS and DY cases. The effect of staple-shaped Wilson lines on T-even observables is studied for the generalized tensor charge and a generalized transverse shift related to the worm-gear function g[subscript 1T]. We emphasize the dependence of these observables on the staple extent and the Collins-Soper evolution parameter. Our numerical calculations use an n[subscript f]=2+1 mixed action scheme with domain wall valence fermions on an Asqtad sea and pion masses 369 MeV as well as 518 MeV.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.85.094510
