?n scattering length from ? photoproduction on the proton near the 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: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Photoproduction of the ? 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?p and effective range r?p between the ? meson and proton are estimated from the shape of the total cross section as a function of the incident photon energy: a?p=(-0.97±0.16)+ i (0.07±0.15) fm and r?p=(+2.78±0.61)+ i (-0.01±0.48) fm, which suggests a repulsive force. The real and imaginary parts for a?p and r?p are determined separately for the first time. The details of the analysis and discussions are described in Ref. [1].

Original languageEnglish
Title of host publicationProceedings of the 14th Asia Pacific Physics Conference
EditorsTeck-Yong Tou, Jun'ichi Yokoyama, Roslan Abdul Shukor, Kazuhiro Tanaka, Hyoung Joon Choi, Ryoji Matsumoto, Oi-Hoong Chin, Jia Hou Chin, Kuru Ratnavelu
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440630
Publication statusPublished - 2021 Feb 5
Event14th Asia Pacific Physics Conference, APPC 2019 - Kuching, Sarawak, Malaysia
Duration: 2019 Nov 172019 Nov 22

Publication series

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


Conference14th Asia Pacific Physics Conference, APPC 2019
CityKuching, Sarawak


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