Journal Article/Contribution to a conference proceedings

PUBDB-2022-00989

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Proton generalized parton distributions from lattice QCD

Scapellato, A.Extern* ; Alexandrou, C.Extern* ; Cichy, K.Extern* ; Constantinou, M. ; Hadjiyiannakou, K. ; Jansen, K. (Corresponding author)DESY* ; Steffens, F.

2022
Sociedad Mexicana de Física Ciudad de México

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Please use a persistent id in citations: doi:10.31349/SuplRevMexFis.3.0308104  doi:10.3204/PUBDB-2022-00989

Report No.: arXiv:2201.06519

Abstract: Momentum and spatial distributions of quarks and gluons inside hadrons are typically encoded in the so-called generalized parton distributions (GPDs). GPDs are multi-dimensional quantities that are very challenging to extract, both experimentally and within lattice QCD. We present the first lattice results on the $x$-dependence of isovector unpolarized, helicity and transversity GPDs of the proton, obtained from lattice QCD using an ensemble of $N_f=2+1+1$ maximally twisted mass fermions, with pion mass $M_\pi=260$ MeV and lattice spacing $a\simeq 0.093$ fm. Our calculations use the quasi-distribution formalism and the final distributions are presented in the MS-bar scheme at a renormalization scale of 2 GeV.

Keyword(s): p: generalized parton distribution ; parton: distribution function ; generalized parton distribution: transversity ; quark: spatial distribution ; fermion: mass: twist ; pi: mass ; scale: renormalization ; lattice field theory ; lattice ; flavor: 4 ; isovector ; gluon ; helicity ; higher-dimensional ; hadron ; lattice QCD ; Lattice QCD ; nucleon structure ; generalized parton distributions ; 11.15.Ha ; 12.38.Gc ; 12.60.-i ; 12.38.Aw

Note: Invited talk at the Hadron 2021 conference. 7 pages, 4 figures

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Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)
2. Theorie (ZEU-THEO)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2022

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Scapellato, A. (Corresponding author) ; Alexandrou, C. ; Cichy, K. ; Constantinou, M. ; Hadjiyiannakou, K. ; Jansen, K.DESY* ; Steffens, F.
Proton generalized parton distributions from lattice QCD
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