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Electromagnetic Pion and Nucleon Form Factors at Positive and Negative $q^2$ Within the Framework of Quark-Gluon Strings Model
- Publication Year :
- 2000
- Publisher :
- arXiv, 2000.
-
Abstract
- The electromagnetic form factors of pion and nucleon are considered within the framework of the Quark-Gluon Strings Model, where the dependence of the form factors on $q^2$ is determined by the intercept of a dominant Regge trajectory and Sudakov form factor. The analytical expressions for the form factors found in the time-like region can be directly continued to the space-like region. Good agreement with available experimental data on the pion and magnetic nucleon form factor is obtained at positive as well as negative $q^2$. It is shown that the difference in $F_\pi$ and $G_m$ at positive and negative values of $q^2$ is mainly related to the behavior of the double logarithmic term in the exponent of Sudakov form factor. The model describes also existing data on the Pauli nucleon form factor $F_2$ and the ratio $G_e/G_m$.<br />Comment: 24 pages, 8 figures
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....af7bc1569c3ca95566484043f3069c24
- Full Text :
- https://doi.org/10.48550/arxiv.hep-ph/0006061