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Hwang SH, Hicks K, Ahn JK, et al. Spin-density matrix elements for γp→K*0Σ+ at Eγ=1.85-3.0 GeV with evidence for the κ(800) meson exchange. Phys Rev Lett. 2012;108(9):092001doi: 10.1103/PhysRevLett.108.092001.
Hwang, S. H., Hicks, K., Ahn, J. K., Nakano, T., Ahn, D. S., Chang, W. C., Chen, J. Y., Daté, S., Ejiri, H., Fujimura, H., Fujiwara, M., Fukui, S., Gohn, W., Hotta, T., Imai, K., Ishikawa, T., Joo, K., Kato, Y., Kohri, H., Kon, Y., Lee, H. S., Maeda, Y., Miyabe, M., Mibe, T., Morino, Y., Muramatsu, N., Nakatsugawa, Y., Niiyama, M., Noumi, H., Oh, Y., Ohashi, Y., Ohta, T., Oka, M., Parker, J., Rangacharyulu, C., Ryu, S. Y., Sawada, T., Sugaya, Y., Sumihama, M., Tsunemi, T., Uchida, M., Ungaro, M., Yosoi, M. (2012). Spin-density matrix elements for γp→K*0Σ+ at Eγ=1.85-3.0 GeV with evidence for the κ(800) meson exchange. Physical review letters, 108(9), 092001. https://doi.org/10.1103/PhysRevLett.108.092001
Hwang, S H, et al. "Spin-density matrix elements for γp→K*0Σ+ at Eγ=1.85-3.0 GeV with evidence for the κ(800) meson exchange." Physical review letters vol. 108,9 (2012): 092001. doi: https://doi.org/10.1103/PhysRevLett.108.092001
Hwang SH, Hicks K, Ahn JK, Nakano T, Ahn DS, Chang WC, Chen JY, Daté S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Gohn W, Hotta T, Imai K, Ishikawa T, Joo K, Kato Y, Kohri H, Kon Y, Lee HS, Maeda Y, Miyabe M, Mibe T, Morino Y, Muramatsu N, Nakatsugawa Y, Niiyama M, Noumi H, Oh Y, Ohashi Y, Ohta T, Oka M, Parker J, Rangacharyulu C, Ryu SY, Sawada T, Sugaya Y, Sumihama M, Tsunemi T, Uchida M, Ungaro M, Yosoi M. Spin-density matrix elements for γp→K*0Σ+ at Eγ=1.85-3.0 GeV with evidence for the κ(800) meson exchange. Phys Rev Lett. 2012 Mar 02;108(9):092001. doi: 10.1103/PhysRevLett.108.092001. Epub 2012 Feb 27. PMID: 22463625.
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Phys Rev Lett. 2012 Mar 02;108(9):092001. doi: 10.1103/PhysRevLett.108.092001. Epub 2012 Feb 27.

Spin-density matrix elements for γp→K*0Σ+ at Eγ=1.85-3.0 GeV with evidence for the κ(800) meson exchange.

Physical review letters

S H Hwang, K Hicks, J K Ahn, T Nakano, D S Ahn, W C Chang, J Y Chen, S Daté, H Ejiri, H Fujimura, M Fujiwara, S Fukui, W Gohn, T Hotta, K Imai, T Ishikawa, K Joo, Y Kato, H Kohri, Y Kon, H S Lee, Y Maeda, M Miyabe, T Mibe, Y Morino, N Muramatsu, Y Nakatsugawa, M Niiyama, H Noumi, Y Oh, Y Ohashi, T Ohta, M Oka, J Parker, C Rangacharyulu, S Y Ryu, T Sawada, Y Sugaya, M Sumihama, T Tsunemi, M Uchida, M Ungaro, M Yosoi,

Affiliations

  1. Department of Physics, Pusan National University, Busan 609-735, Republic of Korea.

PMID: 22463625 DOI: 10.1103/PhysRevLett.108.092001

Abstract

The exclusive reaction γp→K(+)π(-)Σ(+) was measured for the first time using linearly polarized photons at beam energies from 1.85 to 2.96 GeV. Angular distributions in the rest frame of the K(+)π(-) system were fitted to extract spin-density matrix elements of the K(*0) decay. The measured parity spin asymmetry shows that natural-parity exchange is dominant in this reaction. This result clearly indicates the need for t-channel exchange of the κ(800) scalar meson.

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