π e 3 Form Factor f- Near the Mass Shell
Author
Source
Advances in High Energy Physics
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-05-27
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The generalized Ward-Takahashi identity (gWTI) in the pion sector for broken isotopic symmetry is derived and used for the model-independent calculation of the longitudinal form factor f- of the πe3 vector vertex.
The on-shell f- is found to be proportional to the mass difference of the pions and the difference between the vector isospin T=1 and scalar isospin T=2 pion radii.
A numerical estimate of the form factor yields a value two times higher than the previous estimate from the quark model.
Off-shell form factors are known to be ambiguous because of the gauge dependence and the freedom in the parameterization of the fields.
The near-mass-shell f- appears to be an exception, allowing for experimental verification of the consequences of the gWTI.
We calculate the near-mass-shell f- using the gWTI and dispersion techniques.
The results are discussed in the context of the conservation of vector current (CVC) hypothesis.
American Psychological Association (APA)
Krivoruchenko, M. I.. 2015. π e 3 Form Factor f- Near the Mass Shell. Advances in High Energy Physics،Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1052555
Modern Language Association (MLA)
Krivoruchenko, M. I.. π e 3 Form Factor f- Near the Mass Shell. Advances in High Energy Physics No. 2015 (2015), pp.1-9.
https://search.emarefa.net/detail/BIM-1052555
American Medical Association (AMA)
Krivoruchenko, M. I.. π e 3 Form Factor f- Near the Mass Shell. Advances in High Energy Physics. 2015. Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1052555
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1052555