First measurement of differential cross sections and photon beam asymmetries for photoproduction of the f0(980) meson decaying into π0π

N. Muramatsu, S. K. Wang, Q. He,J. K. Ahn,W. C. Chang, J. Y. Chen, M. L. Chu, S. Daté,T. Gogami, Hiroya Goto, H Hamano,Toshikazu Hashimoto,K. Hicks, T. Hiraiwa, Y. Honda, T. Hotta, H. Ikuno, Yoshiyuki Inoue, T. Ishikawa, I. Jaeglé, J. M. Jo, Y. Kasamatsu, H. Katsuragawa, S. Kido, Y. Kon, S. Masumoto, Yuichi Matsumura, M. Miyabe, K. Mizutani,T. Nakamura,Takashi Nakano, Tae Hyun Nam, M. Niiyama, Y. Nozawa, Y. Ōhashi, H. Ohnìshì,Toshiaki Ohta, M. Okabe, K. Ozawa, C. Rangacharyulu, S. Ryu,Y. Sada, T. Shibukawa,H. Shimizu, R. Shirai, Kazunori Shiraishi, E. A. Strokovsky, Y. Sugaya, M. Sumihama,Shoji Suzuki, S. Tanaka, Yusuke Taniguchi, A. O. Tokiyasu, N. Tomida, Y. Tsuchikawa, Takashi Ueda, T. F. Wang, H. Yamazaki, Ryuichi Yamazaki, Y. Yanai, T. Yorita,Chihiro Yoshida, M. Yosoi

Physical Review C（2023）

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摘要

For the first time, differential cross sections and photon beam asymmetries were measured for the reaction γp→f0(980)p→π0π0p by using a linearly polarized photon beam up to 2.4GeV and a liquid hydrogen target. The f0(980) photoproduction signal was clearly observed owing to the absence of contributions from vector-meson photoproduction. The results indicate the t-channel exchange of vector mesons as a mechanism of the f0(980) photoproduction at Eγ≈2.1GeV, putting constraints on the nature of f0(980).Received 17 January 2023Accepted 28 March 2023DOI:https://doi.org/10.1103/PhysRevC.107.L042201©2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasPhotonuclear reactionsPolarization phenomenaQuark modelPhysical SystemsHadronsMesonsPropertiesParticle propertiesTechniquesCalorimetersNuclear PhysicsParticles & Fields

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photon beam asymmetries,photoproduction,differential cross sections

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