Towards high-precision parton distributions from lattice QCD via distillation

Abstract We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-states afforded by distillation leads to a dramatically improved determination of the requisite Ioffe-time Pseudo...

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Autores principales:	Colin Egerer, Robert G. Edwards, Christos Kallidonis, Kostas Orginos, Anatoly V. Radyushkin, David G. Richards, Eloy Romero, Savvas Zafeiropoulos, on behalf of the HadStruc collaboration
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Lattice field theory simulation QCD Phenomenology Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/f455e6f2625d41c587fa7931d6d18770
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spelling	oai:doaj.org-article:f455e6f2625d41c587fa7931d6d187702021-11-28T12:40:41ZTowards high-precision parton distributions from lattice QCD via distillation10.1007/JHEP11(2021)1481029-8479https://doaj.org/article/f455e6f2625d41c587fa7931d6d187702021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)148https://doaj.org/toc/1029-8479Abstract We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-states afforded by distillation leads to a dramatically improved determination of the requisite Ioffe-time Pseudo-distribution (pITD). The impact of higher-twist effects is subsequently explored by extending the Wilson line length present in our non-local operators to one half the spatial extent of the lattice ensemble considered. The valence PDF is extracted by analyzing both the matched Ioffe-time Distribution (ITD), as well as a direct matching of the pITD to the PDF. Through development of a novel prescription to obtain the PDF from the pITD, we establish a concerning deviation of the pITD from the expected DGLAP evolution of the pseudo-PDF. The presence of DGLAP evolution is observed once more following introduction of a discretization term into the PDF extractions. Observance and correction of this discrepancy further highlights the utility of distillation in such structure studies.Colin EgererRobert G. EdwardsChristos KallidonisKostas OrginosAnatoly V. RadyushkinDavid G. RichardsEloy RomeroSavvas Zafeiropouloson behalf of the HadStruc collaborationSpringerOpenarticleLattice field theory simulationQCD PhenomenologyNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-49 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Lattice field theory simulation QCD Phenomenology Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Lattice field theory simulation QCD Phenomenology Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Colin Egerer Robert G. Edwards Christos Kallidonis Kostas Orginos Anatoly V. Radyushkin David G. Richards Eloy Romero Savvas Zafeiropoulos on behalf of the HadStruc collaboration Towards high-precision parton distributions from lattice QCD via distillation
description	Abstract We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-states afforded by distillation leads to a dramatically improved determination of the requisite Ioffe-time Pseudo-distribution (pITD). The impact of higher-twist effects is subsequently explored by extending the Wilson line length present in our non-local operators to one half the spatial extent of the lattice ensemble considered. The valence PDF is extracted by analyzing both the matched Ioffe-time Distribution (ITD), as well as a direct matching of the pITD to the PDF. Through development of a novel prescription to obtain the PDF from the pITD, we establish a concerning deviation of the pITD from the expected DGLAP evolution of the pseudo-PDF. The presence of DGLAP evolution is observed once more following introduction of a discretization term into the PDF extractions. Observance and correction of this discrepancy further highlights the utility of distillation in such structure studies.
format	article
author	Colin Egerer Robert G. Edwards Christos Kallidonis Kostas Orginos Anatoly V. Radyushkin David G. Richards Eloy Romero Savvas Zafeiropoulos on behalf of the HadStruc collaboration
author_facet	Colin Egerer Robert G. Edwards Christos Kallidonis Kostas Orginos Anatoly V. Radyushkin David G. Richards Eloy Romero Savvas Zafeiropoulos on behalf of the HadStruc collaboration
author_sort	Colin Egerer
title	Towards high-precision parton distributions from lattice QCD via distillation
title_short	Towards high-precision parton distributions from lattice QCD via distillation
title_full	Towards high-precision parton distributions from lattice QCD via distillation
title_fullStr	Towards high-precision parton distributions from lattice QCD via distillation
title_full_unstemmed	Towards high-precision parton distributions from lattice QCD via distillation
title_sort	towards high-precision parton distributions from lattice qcd via distillation
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/f455e6f2625d41c587fa7931d6d18770
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Towards high-precision parton distributions from lattice QCD via distillation

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