Jun 2 – 7, 2019
Carnegie Mellon University
America/New_York timezone

## $\omega N$ scattering length from $\omega$ photoproduction on the proton near the threshold

Jun 6, 2019, 5:00 PM
30m
Rangos 1

### Rangos 1

Contributed Meson-Nucleon Interactions

### Speaker

Dr Takatsugu Ishikawa (Research Center for Electron Photon Science, Tohoku University)

### Description

The $\omega$ meson is one of the important particles to describe the nucleon-nucleon interaction. Nevertheless, scattering between the omega meson and nucleon is not well established. Recently we have performed high precision photoproduction experiment of the $\omega$ meson from the proton near the threshold. The total cross sections are determined at incident energies ranging from 1.08 to 1.15 GeV. The 1/2 and 3/2 spin-averaged scattering length $a_{\omega N}$ and effective range $r_{\omega N}$ between the $\omega$ meson and nucleon are extracted from the excitation function of the total cross section using a model with final-state $\omega N$ interaction based on the Lippman-Schwinger equation. The obtained values suggest strong repulsion. We discuss the excitation function of the total cross section for the $\gamma p\to \omega p$ reaction and the $\omega N$ scattering parameters in this talk.

Reference: arXiv:1904.02797 (2019).

Early Consideration Yes No

### Primary author

Dr Takatsugu Ishikawa (Research Center for Electron Photon Science, Tohoku University)