ωN scattering length from ω photoproduction on the proton near the reaction threshold

T. Ishikawa, H. Fujimura, H. Fukasawa, R. Hashimoto, Q. He, Y. Honda, A. Hosaka, T. Iwata, S. Kaida, J. Kasagi, A. Kawano, S. Kuwasaki, K. Maeda, S. Masumoto, M. Miyabe, F. Miyahara, K. Mochizuki, N. Muramatsu, A. Nakamura, S. X. NakamuraK. Nawa, S. Ogushi, Y. Okada, K. Okamura, Y. Onodera, K. Ozawa, Y. Sakamoto, M. Sato, T. Sato, H. Shimizu, H. Sugai, K. Suzuki, Y. Tajima, S. Takahashi, Y. Taniguchi, Y. Tsuchikawa, H. Yamazaki, R. Yamazaki, H. Y. Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

Photoproduction of the ω 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 aωp and effective range rωp between the ω meson and proton are estimated from the shape of the total cross section as a function of the incident photon energy: aωp=(-0.97-0.16stat-0.00syst+0.16stat+0.03syst)+i(0.07-0.14stat-0.09syst+0.15stat+0.17syst) fm and rωp=(+2.78-0.54stat-0.12syst+0.67stat+0.11syst)+i(-0.01-0.50stat-0.00syst+0.46stat+0.06syst) fm, resulting in a repulsive force. The real and imaginary parts for aωp and rωp are determined separately for the first time. A small P-wave contribution does not affect the obtained values.

Original languageEnglish
Article number052201
JournalPhysical Review C
Volume101
Issue number5
DOIs
Publication statusPublished - 2020 May

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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