期刊
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
卷 940, 期 -, 页码 1-121出版社
ELSEVIER
DOI: 10.1016/j.physrep.2021.09.002
关键词
QCD; Collinear factorization; Hard exclusive reactions; Structure of hadrons; Transition distribution amplitudes; Generalized parton distributions; Distribution amplitudes
资金
- European Union [824093]
- P2IO LabEx by Agence Nationale de la Recherche, France [ANR-10-LABX-0038]
- Foundation for the Advancement of Theoretical Physics and Mathematics BASIS''
- National Science Center in Poland [2019/33/B/ST2/02588]
- Agence Nationale de la Recherche (ANR) [ANR-10-LABX-0038] Funding Source: Agence Nationale de la Recherche (ANR)
This article discusses the general properties and physical interpretation of baryon-to-meson and baryon-to-photon transition distribution amplitudes (TDAs), suggesting that these non-perturbative objects are a convenient tool to explore baryon structure at the partonic level. It also provides an overview of hard exclusive reactions and explores experimental opportunities at various facilities.
Baryon-to-meson and baryon-to-photon transition distribution amplitudes (TDAs) arise in the collinear factorized description of a class of hard exclusive reactions characterized by the exchange of a non-zero baryon number in the cross channel. These TDAs extend the concepts of generalized parton distributions (GPDs) and baryon distribution amplitudes (DAs). In this review we discuss the general properties and physical interpretation of baryon-to-meson and baryon-to-photon TDAs. We argue that these non-perturbative objects are a convenient complementary tool to explore the structure of baryons at the partonic level. We present an overview of hard exclusive reactions admitting a description in terms of TDAs. We discuss the first signals from hard exclusive backward meson electroproduction at JLab with the 6 GeV electron beam and explore further experimental opportunities to access TDAs at JLab@12 GeV, PANDA, J-PARC and EIC. (C) 2021 Elsevier B.V. All rights reserved.
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