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Type: Journal article
Title: An improved hadronic model for pion electroproduction
Author: Perry, R.J.
Kızılersü, A.
Thomas, A.W.
Citation: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2020; 807:1-6
Publisher: Elsevier
Issue Date: 2020
ISSN: 0370-2693
Statement of
Robert J.Perry, Ayşe Kızılersü, Anthony W.Thomas
Abstract: Current measurements of the high energy behavior of the pion form factor are obtained from pion electroproduction data. These values are model dependent, utilizing the Vanderhaeghen, Guidal and Laget Regge (VGL) Model for their extraction. Recent work which examined the implementation of gauge invariance in that model suggested that it might lead to extracted pion form factors larger than the true values. Here we introduce a new model which preserves the successes of the VGL Model but implements gauge invariance in a new way. To demonstrate the validity of this new approach, we first use it to extract the pion form factor in a simple toy model. When compared with the previous extraction method, the improved model leads to a more reliable extraction. The success in this simple model leads us to reanalyze the electroproduction cross section data, where we obtain comparable values for the pion form factor to those obtained using the VGL procedure.
Rights: © 2020 The Authors. Published by Elsevier B.V.
RMID: 1000023428
DOI: 10.1016/j.physletb.2020.135581
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Appears in Collections:Physics publications

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