ω N scattering length from ω photoproduction on the proton near the threshold

Takatsugu Ishikawa, Hisako Fujimura, Hiroshi Fukasawa, Ryo Hashimoto, Qinghua He, Yuki Honda, Atsushi Hosaka, Takahiro Iwata, Shun Kaida, Jirohta Kasagi, Atsushi Kawano, Shuzo Kuwasaki, Kazushige Maeda, Shin'ichi Masumoto, Manabu Miyabe, Fusashi Miyahara, Keiichi Mochizuki, Norihito Muramatsu, Akihiko Nakamura, Satoshi X. NakamuraKen'ichi Nawa, Shoei Ogushi, Yasuyuki Okada, Ken'yu Okamura, Yoshihito Onodera, Kyoichiro Ozawa, Yasunobu Sakamoto, Mamoru Sato, Toru Sato, Hajime Shimizu, Hiroyuki Sugai, Koutaku Suzuki, Shin'ichiro Takahashi, Yasuhisa Tajima, Yusuke Taniguchi, Yusuke Tsuchikawa, Hirohito Yamazaki, Ryuji Yamazaki, Hiroshi Yoshida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Although the ω meson is one of the best established hadrons, its fundamental properties such as the interaction with the nucleon is not known yet due to the difficulties in realizing scattering experiments. Recently, we have performed high-precision photoproduction experiment of the ω 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 aωN and effective range rωN between the ω meson and nucleon are extracted from the excitation function of the total cross section using a model with the final-state ωN interaction based on the Lippmann-Schwinger equation. The obtained values are aωp=(-0.97-0.16+0.16)+i(0.07-0.14+0.15) fm and rωp=(+2.78-0.54+0.68)+i(-0.01-0.50+0.46) fm, suggesting a strong repulsion force.

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon
EditorsCurtis Meyer, Reinhard A. Schumacher
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420083
DOIs
Publication statusPublished - 2020 Jul 27
Event15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 - Pittsburgh, United States
Duration: 2019 Jun 22019 Jun 7

Publication series

NameAIP Conference Proceedings
Volume2249
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019
CountryUnited States
CityPittsburgh
Period19/6/219/6/7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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