Near-threshold photoproduction of Λ(1520) from protons and deuterons

N. Muramatsu, J. Y. Chen, W. C. Chang, D. S. Ahn, Jung Keun Ahn, H. Akimune, Y. Asano, S. Daté, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, K. Horie, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, Y. Kato & 35 others H. Kawai, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, M. Miyachi, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, P. M. Shagin, Y. Shiino, 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

Research output: Contribution to journalArticle

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Abstract

Photoproduction of Λ(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles.

Original languageEnglish
Article number012001
JournalPhysical Review Letters
Volume103
Issue number1
DOIs
Publication statusPublished - 2009 Aug 6
Externally publishedYes

Fingerprint

photoproduction
deuterons
asymmetry
thresholds
protons
deuterium
cross sections
liquid hydrogen
photon beams
gauge invariance
neutrons
energy
photons
decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Muramatsu, N., Chen, J. Y., Chang, W. C., Ahn, D. S., Ahn, J. K., Akimune, H., ... Zegers, R. G. T. (2009). Near-threshold photoproduction of Λ(1520) from protons and deuterons. Physical Review Letters, 103(1), [012001]. https://doi.org/10.1103/PhysRevLett.103.012001

Near-threshold photoproduction of Λ(1520) from protons and deuterons. / Muramatsu, N.; Chen, J. Y.; Chang, W. C.; Ahn, D. S.; Ahn, Jung Keun; Akimune, H.; Asano, Y.; Daté, S.; Ejiri, H.; Fujimura, H.; Fujiwara, M.; Fukui, S.; Hasegawa, S.; Hicks, K.; Horie, K.; Hotta, T.; Imai, K.; Ishikawa, T.; Iwata, T.; Kato, Y.; Kawai, H.; Kino, K.; Kohri, H.; Kumagai, N.; Makino, S.; Matsuda, T.; Matsumura, T.; Matsuoka, N.; Mibe, T.; Miyabe, M.; Miyachi, M.; Nakano, T.; Niiyama, M.; Nomachi, M.; Ohashi, Y.; Ohkuma, H.; Ooba, T.; Oshuev, D. S.; Rangacharyulu, C.; Sakaguchi, A.; Shagin, P. M.; Shiino, Y.; Shimizu, H.; Sugaya, Y.; Sumihama, M.; Toi, Y.; Toyokawa, H.; Wakai, A.; Wang, C. W.; Wang, S. C.; Yonehara, K.; Yorita, T.; Yoshimura, M.; Yosoi, M.; Zegers, R. G T.

In: Physical Review Letters, Vol. 103, No. 1, 012001, 06.08.2009.

Research output: Contribution to journalArticle

Muramatsu, N, Chen, JY, Chang, WC, Ahn, DS, Ahn, JK, Akimune, H, Asano, Y, Daté, S, Ejiri, H, Fujimura, H, Fujiwara, M, Fukui, S, Hasegawa, S, Hicks, K, Horie, K, Hotta, T, Imai, K, Ishikawa, T, Iwata, T, Kato, Y, Kawai, H, Kino, K, Kohri, H, Kumagai, N, Makino, S, Matsuda, T, Matsumura, T, Matsuoka, N, Mibe, T, Miyabe, M, Miyachi, M, Nakano, T, Niiyama, M, Nomachi, M, Ohashi, Y, Ohkuma, H, Ooba, T, Oshuev, DS, Rangacharyulu, C, Sakaguchi, A, Shagin, PM, Shiino, Y, Shimizu, H, Sugaya, Y, Sumihama, M, Toi, Y, Toyokawa, H, Wakai, A, Wang, CW, Wang, SC, Yonehara, K, Yorita, T, Yoshimura, M, Yosoi, M & Zegers, RGT 2009, 'Near-threshold photoproduction of Λ(1520) from protons and deuterons', Physical Review Letters, vol. 103, no. 1, 012001. https://doi.org/10.1103/PhysRevLett.103.012001
Muramatsu, N. ; Chen, J. Y. ; Chang, W. C. ; Ahn, D. S. ; Ahn, Jung Keun ; Akimune, H. ; Asano, Y. ; Daté, S. ; Ejiri, H. ; Fujimura, H. ; Fujiwara, M. ; Fukui, S. ; Hasegawa, S. ; Hicks, K. ; Horie, K. ; Hotta, T. ; Imai, K. ; Ishikawa, T. ; Iwata, T. ; Kato, Y. ; Kawai, H. ; Kino, K. ; Kohri, H. ; Kumagai, N. ; Makino, S. ; Matsuda, T. ; Matsumura, T. ; Matsuoka, N. ; Mibe, T. ; Miyabe, M. ; Miyachi, M. ; Nakano, T. ; Niiyama, M. ; Nomachi, M. ; Ohashi, Y. ; Ohkuma, H. ; Ooba, T. ; Oshuev, D. S. ; Rangacharyulu, C. ; Sakaguchi, A. ; Shagin, P. M. ; Shiino, Y. ; Shimizu, H. ; Sugaya, Y. ; Sumihama, M. ; Toi, Y. ; Toyokawa, H. ; Wakai, A. ; Wang, C. W. ; Wang, S. C. ; Yonehara, K. ; Yorita, T. ; Yoshimura, M. ; Yosoi, M. ; Zegers, R. G T. / Near-threshold photoproduction of Λ(1520) from protons and deuterons. In: Physical Review Letters. 2009 ; Vol. 103, No. 1.
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abstract = "Photoproduction of Λ(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles.",
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T1 - Near-threshold photoproduction of Λ(1520) from protons and deuterons

AU - Muramatsu, N.

AU - Chen, J. Y.

AU - Chang, W. C.

AU - Ahn, D. S.

AU - Ahn, Jung Keun

AU - Akimune, H.

AU - Asano, Y.

AU - Daté, S.

AU - Ejiri, H.

AU - Fujimura, H.

AU - Fujiwara, M.

AU - Fukui, S.

AU - Hasegawa, S.

AU - Hicks, K.

AU - Horie, K.

AU - Hotta, T.

AU - Imai, K.

AU - Ishikawa, T.

AU - Iwata, T.

AU - Kato, Y.

AU - Kawai, H.

AU - Kino, K.

AU - Kohri, H.

AU - Kumagai, N.

AU - Makino, S.

AU - Matsuda, T.

AU - Matsumura, T.

AU - Matsuoka, N.

AU - Mibe, T.

AU - Miyabe, M.

AU - Miyachi, M.

AU - Nakano, T.

AU - Niiyama, M.

AU - Nomachi, M.

AU - Ohashi, Y.

AU - Ohkuma, H.

AU - Ooba, T.

AU - Oshuev, D. S.

AU - Rangacharyulu, C.

AU - Sakaguchi, A.

AU - Shagin, P. M.

AU - Shiino, Y.

AU - Shimizu, H.

AU - Sugaya, Y.

AU - Sumihama, M.

AU - Toi, Y.

AU - Toyokawa, H.

AU - Wakai, A.

AU - Wang, C. W.

AU - Wang, S. C.

AU - Yonehara, K.

AU - Yorita, T.

AU - Yoshimura, M.

AU - Yosoi, M.

AU - Zegers, R. G T

PY - 2009/8/6

Y1 - 2009/8/6

N2 - Photoproduction of Λ(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles.

AB - Photoproduction of Λ(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles.

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DO - 10.1103/PhysRevLett.103.012001

M3 - Article

VL - 103

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 1

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