This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.22323/1.396.0413 in citations.
Please use the identifier: http://hdl.handle.net/2128/33602 in citations.
Quark spin-orbit correlations in the proton
Quark spin-orbit correlations in the proton
Generalized transverse momentum-dependent parton distributions (GTMDs) provide a comprehensive framework for imaging the internal structure of the proton. In particular, by encoding the simultaneous distribution of quark transverse positions and momenta, they allow one to directly access longitudina...
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Personal Name(s): | Engelhardt, Michael (Corresponding author) |
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Green, Jeremy / Hasan, Nesreen / Izubuchi, Taku / Kallidonis, Christos / Krieg, Stefan / Liuti, Simonetta / Meinel, Stefan / Negele, John / Pochinsky, Andrew / Rajan, Abha / Silvi, Giorgio / Syritsyn, Sergey | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Published in: |
Proceedings of The 38th International Symposium on Lattice Field Theory — PoS(LATTICE2021) - Sissa Medialab Trieste, Italy, 2022. - ISBN - doi:10.22323/1.396.0413 |
Imprint: |
Sissa Medialab Trieste, Italy
2022
|
Physical Description: |
8 |
DOI: |
10.22323/1.396.0413 |
Conference: | The 38th International Symposium on Lattice Field Theory, Zoom/Gather@Massachusetts Institute of Technology (USA), 2021-07-26 - 2021-07-30 |
Document Type: |
Contribution to a book Contribution to a conference proceedings |
Research Program: |
Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/33602 in citations.
Generalized transverse momentum-dependent parton distributions (GTMDs) provide a comprehensive framework for imaging the internal structure of the proton. In particular, by encoding the simultaneous distribution of quark transverse positions and momenta, they allow one to directly access longitudinal quark orbital angular momentum, and, moreover, to correlate it with the quark helicity. The relevant GTMD is evaluated through a lattice calculation of a proton matrix element of a quark bilocal operator (the separation in which is Fourier conjugate to the quark momentum)featuring a momentum transfer (which is Fourier conjugate to the quark position), as well as the Dirac structure appropriate for capturing the quark helicity. The weighting by quark transverse position requires a derivative with respect to momentum transfer, which is obtained in unbiasedfashion using a direct derivative method. The lattice calculation is performed directly at the physical pion mass, using domain wall fermions to mitigate operator mixing effects. Both the Jaffe-Manohar as well as the Ji quark spin-orbit correlations are extracted, yielding evidence for a strong quark spin-orbit coupling in the proton. |