Off-forward gluonic structure of vector mesons

Off-forward gluonic structure of vector mesons

The spin-independent and transversity generalized form factors (GFFs) of the ϕ meson are studied using lattice QCD calculations with light quark masses corresponding to a pion mass mπ∼450(5)  MeV. One transversity and three spin-independent GFFs related to the lowest moments of leading-twist spin-in...

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Veröffentlicht in:Physical review. D 2017-06, Vol.95 (11), Article 114515
Hauptverfasser: Detmold, W., Pefkou, D., Shanahan, P. E.
Format: Artikel
Sprache:eng
Schlagworte:
Form factors
Gluons
Mesons
Momentum transfer
Nucleons
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum chromodynamics
Quarks
Spatial distribution
Vector mesons
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creator Detmold, W.
Pefkou, D.
Shanahan, P. E.
description The spin-independent and transversity generalized form factors (GFFs) of the ϕ meson are studied using lattice QCD calculations with light quark masses corresponding to a pion mass mπ∼450(5)  MeV. One transversity and three spin-independent GFFs related to the lowest moments of leading-twist spin-independent and transversity gluon distributions are obtained at six nonzero values of the momentum transfer up to 1.2  GeV2. These quantities are compared with the analogous spin-independent quark GFFs and the electromagnetic form factors determined on the same lattice ensemble. The results show quantitative distinction between the spatial distribution of transversely polarized gluons, unpolarized gluons, and quarks and point the way towards further investigations of the gluon structure of nucleons and nuclei.
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source American Physical Society Journals
subjects Form factors
Gluons
Mesons
Momentum transfer
Nucleons
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum chromodynamics
Quarks
Spatial distribution
Vector mesons
title Off-forward gluonic structure of vector mesons
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