Preprint

PUBDB-2024-00326

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The parity-odd structure function of nucleon from the Compton amplitude

Can, K. U. (Corresponding author)Extern* ; Horsley, R. ; Nakamura, Y. ; Rakow, P. E. L. ; Schierholz, G.DESY* ; Stüben, H. ; Young, R. D. ; Zanotti, J. M.

2024

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Please use a persistent id in citations: doi:10.3204/PUBDB-2024-00326

Report No.: ADP-24-02/T1241; DESY-24-013; LTH 1363; arXiv:2402.00255

Abstract: The dominant contribution to the theoretical uncertainty in the extracted weak parameters of the Standard Model comes from the hadronic uncertainties in the electroweak boxes, i.e. $\gamma-W^\pm/Z$ exchange diagrams. A dispersive analysis relates the box diagrams to the parity-odd structure function, $F_3$, for which the experimental data either do not exist or belong to a separate isospin channel. Therefore a first-principles calculation of $F_3$ is highly desirable. In this contribution, we report on the QCDSF/UKQCD Collaboration's progress in calculating the moments of the $F_3^{\gamma Z}$ structure function from the forward Compton amplitude at the SU(3) symmetric point.

Keyword(s): nucleon, structure function ; dispersion ; SU(3) ; electroweak interaction ; isospin

Note: 9 pages, 3 figures. Contribution to the 40th International Symposium on Lattice Field Theory (Lattice 2023) July 31st - August 4th, 2023, Fermi National Accelerator Laboratory, Batavia IL, USA

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

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

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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