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

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

doi:10.1103/PhysRevLett.108.092001

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

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. KonH. 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

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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.

Original language	English
Article number	092001
Journal	Physical review letters
Volume	108
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.108.092001
Publication status	Published - 2012 Feb 27
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.108.092001

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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., ... Yosoi, M. (2012). Spin-density matrix elements for γp→K ^*0Σ ⁺ at E _γ=1.85-3.0GeV with evidence for the κ(800) meson exchange. Physical review letters, 108(9), Article 092001. 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 2012, 'Spin-density matrix elements for γp→K ^*0Σ ⁺ at E _γ=1.85-3.0GeV with evidence for the κ(800) meson exchange', Physical review letters, vol. 108, no. 9, 092001. https://doi.org/10.1103/PhysRevLett.108.092001

@article{706fc133d555421aa3bec9b7bc1259e1,

title = "Spin-density matrix elements for γp→K *0Σ + at E γ=1.85-3.0GeV with evidence for the κ(800) meson exchange",

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.",

author = "Hwang, {S. H.} and K. Hicks and Ahn, {J. K.} and T. Nakano and Ahn, {D. S.} and Chang, {W. C.} and Chen, {J. Y.} and S. Dat{\'e} and H. Ejiri and H. Fujimura and M. Fujiwara and S. Fukui and W. Gohn and T. Hotta and K. Imai and T. Ishikawa and K. Joo and Y. Kato and H. Kohri and Y. Kon and Lee, {H. S.} and Y. Maeda and M. Miyabe and T. Mibe and Y. Morino and N. Muramatsu and Y. Nakatsugawa and M. Niiyama and H. Noumi and Y. Oh and Y. Ohashi and T. Ohta and M. Oka and J. Parker and C. Rangacharyulu and Ryu, {S. Y.} and T. Sawada and Y. Sugaya and M. Sumihama and T. Tsunemi and M. Uchida and M. Ungaro and M. Yosoi",

year = "2012",

month = feb,

day = "27",

doi = "10.1103/PhysRevLett.108.092001",

language = "English",

volume = "108",

journal = "Physical review letters",

issn = "0031-9007",

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TY - JOUR

T1 - Spin-density matrix elements for γp→K *0Σ + at E γ=1.85-3.0GeV with evidence for the κ(800) meson exchange

AU - Hwang, S. H.

AU - Hicks, K.

AU - Ahn, J. K.

AU - Nakano, T.

AU - Ahn, D. S.

AU - Chang, W. C.

AU - Chen, J. Y.

AU - Daté, S.

AU - Ejiri, H.

AU - Fujimura, H.

AU - Fujiwara, M.

AU - Fukui, S.

AU - Gohn, W.

AU - Hotta, T.

AU - Imai, K.

AU - Ishikawa, T.

AU - Joo, K.

AU - Kato, Y.

AU - Kohri, H.

AU - Kon, Y.

AU - Lee, H. S.

AU - Maeda, Y.

AU - Miyabe, M.

AU - Mibe, T.

AU - Morino, Y.

AU - Muramatsu, N.

AU - Nakatsugawa, Y.

AU - Niiyama, M.

AU - Noumi, H.

AU - Oh, Y.

AU - Ohashi, Y.

AU - Ohta, T.

AU - Oka, M.

AU - Parker, J.

AU - Rangacharyulu, C.

AU - Ryu, S. Y.

AU - Sawada, T.

AU - Sugaya, Y.

AU - Sumihama, M.

AU - Tsunemi, T.

AU - Uchida, M.

AU - Ungaro, M.

AU - Yosoi, M.

PY - 2012/2/27

Y1 - 2012/2/27

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevLett.108.092001

DO - 10.1103/PhysRevLett.108.092001

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VL - 108

JO - Physical review letters

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M1 - 092001

ER -

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

Abstract

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