Structure of pion photoproduction amplitudes

作     者：V. Mathieu J. Nys C. Fernández-Ramírez A. N. Hiller Blin A. Jackura A. Pilloni A. P. Szczepaniak G. Fox 

作者机构：Theory Center Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News Virginia 23606 USA Department of Physics and Astronomy Ghent University Ghent 9000 Belgium Instituto de Ciencias Nucleares Universidad Nacional Autónoma de México Ciudad de México 04510 Mexico Institut für Kernphysik & PRISMA Cluster of Excellence Johannes Gutenberg Universität D-55099 Mainz Germany Center for Exploration of Energy and Matter Indiana University Bloomington Indiana 47403 USA Physics Department Indiana University Bloomington Indiana 47405 USA School of Informatics and Computing Indiana University Bloomington Indiana 47405 USA 

出 版 物：《Physical Review D》 (Phy. Rev. D)

年 卷 期：2018年第98卷第1期

页      面：014041-014041页

核心收录：

基　　金：Fonds Wetenschappelijk Onderzoek, FWO Deutsche Forschungsgemeinschaft, DFG U.S. Department of Energy, USDOE FWO-Flanders Office of Science, SC PAPIIT-DGAPA, (IA101717) National Science Foundation, NSF, (1205019, 1513524, PHY-1415459, PHY-1205019, PHY-1415459, PHY-1513524) Nuclear Physics, NP, (DE-AC05-06OR23177, DE-FG0287ER40365) Consejo Nacional de Ciencia y Tecnología, CONACYT, (251817) 

主　　题：Models & methods for nuclear reactions Photonuclear reactions 

摘      要：We derive and apply the finite energy sum rules to pion photoproduction. We evaluate the low-energy part of the sum rules using several state-of-the-art models. We show how the differences in the low-energy side of the sum rules might originate from different quantum number assignments of baryon resonances. We interpret the observed features in the low-energy side of the sum rules with the expectation from Regge theory. Finally, we present a model, in terms of a Regge-pole expansion, that matches the sum rules and the high-energy observables.