Improved phenomenology of $πN$ transition distribution amplitudes
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915588530503680 |
|---|---|
| author | Pire, Bernard Semenov-Tian-Shansky, Kirill Sznajder, Paweł Szymanowski, Lech |
| author_facet | Pire, Bernard Semenov-Tian-Shansky, Kirill Sznajder, Paweł Szymanowski, Lech |
| contents | To study cross sections and polarization asymmetries for the processes $e p \to e n π^+$ and $e p \to e p π^0$ in the backward region, we develop a flexible phenomenological model for nucleon-to-pion transition distribution amplitudes ($πN$ TDAs), which are used in the QCD collinear factorization description of the scattering amplitudes. Our model is based on the two-component factorized Ansatz for the corresponding spectral densities, quadruple distribution. It takes into account the constraints for $πN$ TDAs arising from the threshold pion production theorem and also includes a forward limit contribution that can be fitted to experimental data. We examine the sensitivity of observable predictions to various modelling assumptions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_27425 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Improved phenomenology of $πN$ transition distribution amplitudes Pire, Bernard Semenov-Tian-Shansky, Kirill Sznajder, Paweł Szymanowski, Lech High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory To study cross sections and polarization asymmetries for the processes $e p \to e n π^+$ and $e p \to e p π^0$ in the backward region, we develop a flexible phenomenological model for nucleon-to-pion transition distribution amplitudes ($πN$ TDAs), which are used in the QCD collinear factorization description of the scattering amplitudes. Our model is based on the two-component factorized Ansatz for the corresponding spectral densities, quadruple distribution. It takes into account the constraints for $πN$ TDAs arising from the threshold pion production theorem and also includes a forward limit contribution that can be fitted to experimental data. We examine the sensitivity of observable predictions to various modelling assumptions. |
| title | Improved phenomenology of $πN$ transition distribution amplitudes |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2510.27425 |