rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements
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_ | 1866911138854207488 |
|---|---|
| author | Strakovsky, Igor I. Isupov, Evgeny L. Mokeev, Victor Schmidt, Axel |
| author_facet | Strakovsky, Igor I. Isupov, Evgeny L. Mokeev, Victor Schmidt, Axel |
| contents | Extending our study of the vector meson-nucleon scattering lengths (summary is given in Ref.~\cite{Strakovsky:2021vyk}), we are focusing on the $ρ$-meson case using recent CLAS threshold data for the reaction $γp \to ρp$ within the meson-baryon reaction model~\cite{CLAS:2018drk}. The total $σ_t(γp\to ρp)$ and $σ_t(γp\to ωp)$ cross sections are close below the momentum of the vector meson in CM $q = 0.2~\mathrm{GeV/c}$. Then the $ρp$ photoproduction cross section grows rapidly. Our result for $ρN$ scattering length is a factor of 4 smaller than the size of the hadron and the phenomenological determination of the $ω$ nucleon scattering length using threshold photoproduction cross sections. The observed difference between $ρN$ and $ωN$ scattering lengths is of interest for further understanding within the hadron structure theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04672 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements Strakovsky, Igor I. Isupov, Evgeny L. Mokeev, Victor Schmidt, Axel Nuclear Theory High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Extending our study of the vector meson-nucleon scattering lengths (summary is given in Ref.~\cite{Strakovsky:2021vyk}), we are focusing on the $ρ$-meson case using recent CLAS threshold data for the reaction $γp \to ρp$ within the meson-baryon reaction model~\cite{CLAS:2018drk}. The total $σ_t(γp\to ρp)$ and $σ_t(γp\to ωp)$ cross sections are close below the momentum of the vector meson in CM $q = 0.2~\mathrm{GeV/c}$. Then the $ρp$ photoproduction cross section grows rapidly. Our result for $ρN$ scattering length is a factor of 4 smaller than the size of the hadron and the phenomenological determination of the $ω$ nucleon scattering length using threshold photoproduction cross sections. The observed difference between $ρN$ and $ωN$ scattering lengths is of interest for further understanding within the hadron structure theory. |
| title | rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements |
| topic | Nuclear Theory High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2509.04672 |