Journal Article

PUBDB-2022-04199

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Phenomenology of diphoton photoproduction at next-to-leading order

Grocholski, O. (Corresponding author)DESY* ; Pire, B. ; Sznajder, P. ; Szymanowski, L. ; Wagner, J.

2022
Inst. Melville, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.105.094025  doi:10.3204/PUBDB-2022-04199

Report No.: CPHT-RR020.032022; DESY-22-061; arXiv:2204.00396

Abstract: We develop the analysis of diphoton exclusive photoproduction in the kinematics where a collinear QCD factorization framework applies, namely nearly forward large invariant mass diphoton production. We work at the leading twist level and at the next-to-leading order (NLO) in the strong coupling constant $\alpha_S$. We compare our predictions for cross sections with Born order calculations for the experimental conditions accessible to JLab experiments and show the interesting sensitivity of our results to various models of generalized parton distributions (GPDs). The NLO corrections are rather large and negative but do not prevent the studied reaction from being a promising tool for the extraction of C–odd GPDs, which do not contribute to either spacelike or timelike deeply virtual Compton scattering amplitudes.

Keyword(s): higher-order: 1 ; strong interaction: coupling constant ; parton: distribution function ; quantum chromodynamics: factorization ; two-photon ; generalized parton distribution ; photoproduction ; twist ; scattering amplitude ; sensitivity ; collinear ; deeply virtual Compton scattering ; kinematics ; Jefferson Lab ; strong coupling ; 13.60.Fz ; 12.38.Bx ; 13.88.+e

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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 2022

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Grocholski, O. (Corresponding author)DESY* ; Pire, B. ; Sznajder, P. ; Szymanowski, L. ; Wagner, J.
Phenomenology of diphoton photoproduction at next-to-leading order
[10.3204/PUBDB-2022-01702]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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