Near-threshold Λ(1520) production by the γ→p→K +Λ(1520) reaction at forward K+ angles

H. Kohri, D. S. Ahn, Jung Keun Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Daté, H. Ejiri, S. Fukui, H. Fujimura, M. Fujiwara, S. Hasegawa, K. Hicks, A. Hosaka, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. KimK. Kino, N. Kumagai, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, T. Nakano, S. I. Nam, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sasaki, P. M. Shagin, Y. Shiino, A. Shimizu, H. Shimizu, Y. Sugaya, M. Sumihama, A. I. Titov, Y. Toi, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G T Zegers

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Abstract

Differential cross sections and photon-beam asymmetries for the γ→p→K+Λ(1520) reaction have been measured with linearly polarized photon beams at energies from the threshold to 2.4 GeV at 0.6<cos θc.m.K<1. A new bump structure was found at W 2.11GeV in the cross sections. The bump is not well reproduced by theoretical calculations introducing a nucleon resonance with J≤32. This result suggests that the bump might be produced by a nucleon resonance possibly with J 52 or by a new reaction process, for example, an interference effect with the φ photoproduction having a similar bump structure in the cross sections.

Original languageEnglish
Article number172001
JournalPhysical Review Letters
Volume104
Issue number17
DOIs
Publication statusPublished - 2010 Apr 26
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kohri, H., Ahn, D. S., Ahn, J. K., Akimune, H., Asano, Y., Chang, W. C., Daté, S., Ejiri, H., Fukui, S., Fujimura, H., Fujiwara, M., Hasegawa, S., Hicks, K., Hosaka, A., Hotta, T., Imai, K., Ishikawa, T., Iwata, T., Kawai, H., ... Zegers, R. G. T. (2010). Near-threshold Λ(1520) production by the γ→p→K +Λ(1520) reaction at forward K+ angles. Physical Review Letters, 104(17), [172001]. https://doi.org/10.1103/PhysRevLett.104.172001