Document Type

Article

Publication Date

2024

DOI

10.1103/PhysRevD.110.114012

Publication Title

Physical Review D

Volume

110

Issue

11

Pages

114012 (1-18)

Abstract

The Reggeized pion is expected to provide the main contribution to the forward cross section in light meson photoproduction reactions with charge exchange at high energies. We discuss the Reggeization of pion exchange in charged pion photoproduction with an emphasis on consistency with current conservation. We show that the gauge-invariant amplitude for the exchange of a particle with a generic even spin J ≥ 2 in the t channel is analytic at J = 0 and that it can be interpreted in terms of the nucleon electric current. This enables us to reconcile the dynamics in the s and u channel, which involves also nucleon exchanges, with the amplitude expressed in terms of t-channel partial waves, as required by Regge theory.

Rights

© 2024 The Authors.

Published under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Original Publication Citation

Montana, G., Winney, D., Bibrzycki, L., Fernandez-Ramirez, C., Foti, G., Hammoud, N., Mathieu, V., Perry, R. J., Pilloni, A., Rodas, A., Shastry, V., Smith, W. A., & Szczepaniak, A. P. (2024). Revisiting gauge invariance and Reggeization of pion exchange. Physical Review D, 110(11), 1-18, Article 114012 https://doi.org/10.1103/PhysRevD.110.114012

ORCID

0000-0003-2702-5286 (Rodas)

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