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Gluonic transversity from lattice QCD

Author(s)
Detmold, William; Shanahan, Phiala E
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Abstract
We present an exploratory study of the gluonic structure of the ϕ meson using lattice QCD (LQCD). This includes the first investigation of gluonic transversity via the leading moment of the twist-2 double-helicity-flip gluonic structure function Δ(χ,Q²). This structure function only exists for targets of spin J ≥ 1 and does not mix with quark distributions at leading twist, thereby providing a particularly clean probe of gluonic degrees of freedom. We also explore the gluonic analogue of the Soffer bound which relates the helicity flip and nonflip gluonic distributions, finding it to be saturated at the level of 80%. This work sets the stage for more complex LQCD studies of gluonic structure in the nucleon and in light nuclei where Δ(χ,Q²) is an “exotic glue” observable probing gluons in a nucleus not associated with individual nucleons.
Date issued
2016-07
URI
http://hdl.handle.net/1721.1/108241
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Detmold, W., and P. E. Shanahan. “Gluonic Transversity from Lattice QCD.” Physical Review D 94, no. 1 (July 26, 2016). © 2016 American Physical Society
Version: Final published version
ISSN
2470-0010
2470-0029

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