The gluon structure of hadrons and nuclei from lattice QCD

Shanahan, Phiala A.

doi:10.1051/epjconf/201817501015

The gluon structure of hadrons and nuclei from lattice QCD

Conference · Sun Apr 01 04:00:00 EDT 2018 · EPJ Web of Conferences

DOI:https://doi.org/10.1051/epjconf/201817501015· OSTI ID:1434236

Shanahan, Phiala A. ^[1]

College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

I discuss recent lattice QCD studies of the gluon structure of hadrons and light nuclei. After very briefly highlighting new determinations of the gluon contributions to the nucleon's momentum and spin, presented by several collaborations over the last year, I describe first calculations of gluon generalised form factors. The generalised transversity gluon distributions are of particular interest since they are purely gluonic; they do not mix with quark distributions at leading twist. In light nuclei they moreover provide a clean signature of non-nucleonic gluon degrees of freedom, and I present the first evidence for such effects, based on lattice QCD calculations. The planned Electron-Ion Collider, designed to access gluon structure quantities, will have the capability to test this prediction, and measure a range of gluon observables including generalised gluon distributions and transverse momentum dependent gluon distributions, within the next decade.

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Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

DOE Contract Number:: AC05-06OR23177

OSTI ID:: 1434236

Report Number(s):: JLAB-THY-18-2686; DOE/OR/23177-4418

Conference Information:: Journal Name: EPJ Web of Conferences Journal Volume: 175

Country of Publication:: United States

Language:: English

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