Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/121473
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Type: Journal article
Title: Model dependence of the pion form factor extracted from pion electroproduction
Author: Perry, R.J.
Kizilersu, A.
Thomas, A.W.
Citation: Physical Review C, 2019; 100(2):025206-1-025206-13
Publisher: American Physical Society
Issue Date: 2019
ISSN: 2469-9985
2469-9993
Statement of
Responsibility: 
Robert J. Perry, Ayşe Kızılersü, and Anthony W. Thomas
Abstract: In 2008 the Jefferson Laboratory F π Collaboration released results for the pion electromagnetic form factor, which they extracted from pion electroproduction data. The measured values for the pion form factor are model dependent, and require the use of the Vanderhaeghen, Guidal, and Laget Regge model for their extraction. While agreement between this model and data is impressive, the theoretical implementation of gauge invariance is less satisfying. We would like to establish how well the extracted form factor corresponds to the true form factor. To do this, we use a simple toy model, which imposes gauge invariance in a more theoretically satisfying way. The model form factor is extracted from our model cross section using the method employed by the Fπ Collaboration to extract the experimental pion form factor. We conclude that the reconstructed model form factor is a reasonable representation of the true model form factor for the kinematics chosen, although we note that the extracted form factor is smaller than the true form factor. This suggests that current extracted values of the pion form factor may be overestimated.
Rights: ©2019 American Physical Society
DOI: 10.1103/PhysRevC.100.025206
Grant ID: http://purl.org/au-research/grants/arc/CE1101004
http://purl.org/au-research/grants/arc/DP150103101
http://purl.org/au-research/grants/arc/DP180100497
Published version: http://dx.doi.org/10.1103/physrevc.100.025206
Appears in Collections:Aurora harvest 8
Mathematical Sciences publications

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