Contribution of Hard Near Threshold Pion Electro Production to Nucleon Structure Functions

Details Contribution of Hard Near Threshold Pion Electro Production to Nucleon Structure Functions Contribution of Hard Near Threshold Pion Electro Production to Nucleon Structure Functions

2011-10-20

arxiv.org/abs/1110.4484v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

We provide a precise calculation for the contribution of hard near threshold pion electro production to all nucleon structure functions. This framework will allow us to split the required nucleon to pion nucleon transition probability matrix element into an exact threshold part parametrized by nucleon to pion nucleon transition form factors plus soft pion structures. These transition form factors will be related to nucleon form factors by taking into account symmetric and antisymmetric contributions of the needed leading twist nucleon distribution amplitude. Whereas the relations generated by the symmetric contributions are already known, this work will improve these relations by adding reasonable antisymmetric contributions. The obtained results show enhanced and significant consistency to experimental data, so that various predictions for further interesting experiments will be presented.

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