Target normal single-spin asymmetry in inclusive electron-nucleon scattering with two-photon exchange: Analysis using 1/Nc expansion

Goity, J.L.; Weiss, C.; Willemyns, Cintia

doi:10.1016/j.physletb.2022.137580

Article (Scientific journals)

Target normal single-spin asymmetry in inclusive electron-nucleon scattering with two-photon exchange: Analysis using 1/Nc expansion

Goity, J.L.; Weiss, C.; Willemyns, Cintia

2022 • In Physics Letters B, 835, p. 137580

Peer Reviewed verified by ORBi

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https://hdl.handle.net/20.500.12907/44494

DOI
10.1016/j.physletb.2022.137580

arXiV
2207.07588v1

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Keywords :

Nuclear and High Energy Physics; High Energy Physics - Phenomenology; Nuclear Theory

Abstract :

[en] We calculate the target normal single-spin asymmetry caused by two-photon exchange in inclusive electron-nucleon scattering in the resonance region. Our analysis uses the 1/Nc expansion of low-energy QCD and combines N and Δ intermediate and final states using the contracted SU(4) spin-flavor symmetry. The normal spin asymmetry obtained in leading-order accuracy in 1/Nc has magnitude ∼10−2 and different sign in ep and en scattering. It can be measured in electron scattering at lab energies ∼0.5–1.5 GeV and provides a clean probe of two-photon exchange dynamics.

Disciplines :

Physics

Author, co-author :

Goity, J.L.; Department of Physics, Hampton University, Hampton, United States ; Theory Center, Jefferson Lab, Newport News, United States

Weiss, C.; Theory Center, Jefferson Lab, Newport News, United States

Willemyns, Cintia ; Université de Mons - UMONS

Language :

English

Title :

Target normal single-spin asymmetry in inclusive electron-nucleon scattering with two-photon exchange: Analysis using 1/Nc expansion

Publication date :

10 December 2022

Journal title :

Physics Letters B

ISSN :

0370-2693

Publisher :

Elsevier B.V.

Volume :

835

Pages :

137580

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S0370269322007146?httpAccept=text/xml

Research unit :

S824 - Physique nucléaire et subnucléaire

Research institute :

Complexys

Funding text :

This material is based upon work supported by the U.S. Department of Energy Office of Science , Office of Nuclear Physics under contract DE-AC05-06OR23177 (JLG, CWe); by the National Science Foundation , Grant Number PHY 1913562 (JLG); and by the Fonds de la Recherche Scientifique ( FNRS ) (Belgium), Grant Number 4.45.10.08 (CTWi).

Commentary :

7 pages, 2 figures

Available on ORBi UMONS :

since 11 January 2023

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