ωN scattering length from ω photoproduction on the proton near the reaction threshold
| Autor: | H. Fujimura, Hirohiko M. Shimizu, Jirohta Kasagi, Hirohito Yamazaki, K. Nawa, T. Iwata, Kazushige Maeda, Fusashi Miyahara, Hiroshi Yoshida, H. Fukasawa, Yasuhisa Tajima, Toru Sato, Norihito Muramatsu, Manabu Miyabe, Satoshi Nakamura, K. Okamura, Y. Sakamoto, A. Kawano, K. Mochizuki, Koutaku Suzuki, Y. Taniguchi, Y. Okada, Yuki Honda, S. Kaida, Y. Onodera, H. Sugai, R. Yamazaki, A. Nakamura, Atsushi Hosaka, Q. He, Kyoichiro Ozawa, Mitsuhiro Sato, T. Ishikawa, S. Kuwasaki, Shinichi Masumoto, Yusuke Tsuchikawa, R. Hashimoto, S. Takahashi, S. Ogushi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review C. 101 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.101.052201 |
| Popis: | Photoproduction of the $\omega$ meson on the proton has been experimentally studied near the threshold. The total cross sections are determined at incident energies ranging from 1.09 to 1.15 GeV. The 1/2 and 3/2 spin-averaged scattering length $a_{\omega p}$ and effective range $r_{\omega p}$ between the $\omega$ meson and proton are estimated from the shape of the total cross section as a function of the incident photon energy: $a_{\omega p} = \left(-0.97^{+0.16_{\rm stat}}_{-0.16_{\rm stat}}{}^{+0.03_{\rm syst}}_{-0.00_{\rm syst}}\right)+i \left(0.07^{+0.15_{\rm stat}}_{-0.14_{\rm stat}}{}^{+0.17_{\rm syst}}_{-0.09_{\rm syst}}\right)$ fm and $r_{\omega p}=\left(+2.78^{+0.68_{\rm stat}}_{-0.54_{\rm stat}}{}^{+0.11_{\rm syst}}_{-0.13_{\rm syst}}\right)+i\left(-0.01^{+0.46_{\rm stat}}_{-0.50_{\rm stat}}{}^{+0.07_{\rm syst}}_{-0.00_{\rm syst}}\right)$ fm, resulting in a repulsive force. The real and imaginary parts for $a_{\omega p}$ and $r_{\omega p}$ are determined separately for the first time. A small $P$-wave contribution does not affect the obtained values. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|