Cross sections and beam asymmetry for K+Σ*- photoproduction from the deuteron at Eγ=1.5-2.4GeV

K. Hicks, D. Keller, H. Kohri, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Daté, H. Ejiri, S. Fukui, H. Fujimura, M. Fujiwara, S. Hasegawa, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. KawaiZ. Y. Kim, K. Kino, N. Kumagai, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, T. Nakano, M. Niiyama, M. Nomachi, Y. Oh, Y. Ohashi, H. Ohkuma, T. Ooba, J. Parker, C. Rangacharyulu, A. Sakaguchi, T. Sasaki, P. M. Shagin, Y. Shiino, A. Shimizu, H. Shimizu, Y. Sugaya, M. Sumihama, 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

The Σ(1385) resonance, or Σ*, is well known as part of the standard baryon decuplet with spin J=32. Measurements of the reaction γp→K+Σ*0 are difficult to extract due to overlap with the nearby Λ(1405) resonance. However, the reaction γn→K+Σ *- has no overlap with the Λ(1405) due to its charge. Here we report the first measurement of cross sections and beam asymmetries for photoproduction of the Σ*- from a deuteron target. The cross sections at forward angles range from 0.4 to 1.2μb, with a broad maximum near Eγ 1.8GeV. The beam asymmetries are negative, in contrast with positive values for the γn→K+Σ- reaction.

Original languageEnglish
Article number012501
JournalPhysical review letters
Volume102
Issue number1
DOIs
Publication statusPublished - 2009 Jan 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Hicks, K., Keller, D., 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., Hotta, T., Imai, K., Ishikawa, T., Iwata, T., Kato, Y., ... Zegers, R. G. T. (2009). Cross sections and beam asymmetry for K+Σ*- photoproduction from the deuteron at Eγ=1.5-2.4GeV. Physical review letters, 102(1), [012501]. https://doi.org/10.1103/PhysRevLett.102.012501