Revisiting gauge invariance and Reggeization of pion exchange
Year: 2024
Type: article
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. Published by the American Physical Society 2024
Institutions: Thomas Jefferson National Accelerator Facility, University of Bonn, AGH University of Krakow, Universidad Nacional de Educación a Distancia, University of Messina, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Institut de Ciències del Cosmos, Universitat de Barcelona, Old Dominion University, Indiana University Bloomington, Indiana University, Lawrence Berkeley National Laboratory, George Washington University, University of California, Berkeley
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: THEORETICAL STUDIES OF INTERMEDIATE - ENERGY NUCLEAR PHYSICS, G1553439044, G1728142190, G20115333, G222768804, G2262748287, G2263355576, G2988778103, G3035362077, G3044628913, G3111662533, G3142173218, G3480869486, G3780874795, G4087634877, G425668148, G4774512024, G624073364, G632107855, G6731524417, G683931746, G7084143925, G7451223319, G7520763071, G776309457, G7774527281, G7863371703, G8497050386, THEORETICAL STUDIES IN NUCLEAR AND HADRONIC PHYSICS
OpenAlex ID: W4405108773