Gluonic transversity from lattice QCD

Detmold, W.; Shanahan, P. E.

doi:10.1103/physrevd.94.014507

Gluonic transversity from lattice QCD

Journal Article · Tue Jul 26 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/physrevd.94.014507· OSTI ID:1505585

Detmold, W. ^[1]; Shanahan, P. E. ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); NONE
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

In this paper, 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(x,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%. Finally, this work sets the stage for more complex LQCD studies of gluonic structure in the nucleon and in light nuclei where Δ(x,Q²) is an “exotic glue” observable probing gluons in a nucleus not associated with individual nucleons.

View Accepted Manuscript (DOE)

Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0010495; SC0011090

OSTI ID:: 1505585

Alternate ID(s):: OSTI ID: 1272656

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 1 Vol. 94; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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