Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold

W. C. Chang; D. S. Ahn; J. K. 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; H. Kawai; K. Kino; H. Kohri; N. Kumagai; P. J. Lin; S. Makino; T. Matsuda; T. Matsumura; N. Matsuoka; T. Mibe; M. Miyabe; Y. Miyachi; N. Muramatsu; 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; M. Uchida; A. Wakai; C. W. Wang; S. C. Wang; K. Yonehara; T. Yorita; M. Yoshimura; M. Yosoi; R. G.T. Zegers

doi:10.1103/PhysRevC.82.015205

Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold

W. C. Chang, D. S. Ahn, J. K. 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, H. Kawai, K. KinoH. Kohri, N. Kumagai, P. J. Lin, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, Y. Miyachi, N. Muramatsu, 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, M. Uchida, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G.T. Zegers

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→p, γd→pn, and γd→d at forward production angles. A linearly polarized photon beam at Eγ=1.6-2.4 GeV was used for the production of mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed.

Original language	English
Article number	015205
Journal	Physical Review C - Nuclear Physics
Volume	82
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.82.015205
Publication status	Published - 2010 Jul 23
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevC.82.015205

Cite this

Chang, W. C., Ahn, D. S., Ahn, J. K., 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., ... Zegers, R. G. T. (2010). Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold. Physical Review C - Nuclear Physics, 82(1), Article 015205. https://doi.org/10.1103/PhysRevC.82.015205

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, Lin, PJ, Makino, S, Matsuda, T, Matsumura, T, Matsuoka, N, Mibe, T, Miyabe, M, Miyachi, Y, Muramatsu, N, 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, Uchida, M, Wakai, A, Wang, CW, Wang, SC, Yonehara, K, Yorita, T, Yoshimura, M, Yosoi, M & Zegers, RGT 2010, 'Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold', Physical Review C - Nuclear Physics, vol. 82, no. 1, 015205. https://doi.org/10.1103/PhysRevC.82.015205

@article{bf9c5eea01e74e0ab94ef21554bba5e8,

title = "Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold",

abstract = "The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→p, γd→pn, and γd→d at forward production angles. A linearly polarized photon beam at Eγ=1.6-2.4 GeV was used for the production of mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed.",

author = "Chang, {W. C.} and Ahn, {D. S.} and Ahn, {J. K.} and H. Akimune and Y. Asano and S. Dat{\'e} and H. Ejiri and H. Fujimura and M. Fujiwara and S. Fukui and S. Hasegawa and K. Hicks and K. Horie and T. Hotta and K. Imai and T. Ishikawa and T. Iwata and Y. Kato and H. Kawai and K. Kino and H. Kohri and N. Kumagai and Lin, {P. J.} and S. Makino and T. Matsuda and T. Matsumura and N. Matsuoka and T. Mibe and M. Miyabe and Y. Miyachi and N. Muramatsu and T. Nakano and M. Niiyama and M. Nomachi and Y. Ohashi and H. Ohkuma and T. Ooba and Oshuev, {D. S.} and C. Rangacharyulu and A. Sakaguchi and Shagin, {P. M.} and Y. Shiino and H. Shimizu and Y. Sugaya and M. Sumihama and Y. Toi and H. Toyokawa and M. Uchida and A. Wakai and Wang, {C. W.} and Wang, {S. C.} and K. Yonehara and T. Yorita and M. Yoshimura and M. Yosoi and Zegers, {R. G.T.}",

year = "2010",

month = jul,

day = "23",

doi = "10.1103/PhysRevC.82.015205",

language = "English",

volume = "82",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "1",

}

TY - JOUR

T1 - Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold

AU - Chang, W. C.

AU - Ahn, D. S.

AU - Ahn, J. K.

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 - Lin, P. J.

AU - Makino, S.

AU - Matsuda, T.

AU - Matsumura, T.

AU - Matsuoka, N.

AU - Mibe, T.

AU - Miyabe, M.

AU - Miyachi, Y.

AU - Muramatsu, N.

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 - Uchida, M.

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 - 2010/7/23

Y1 - 2010/7/23

N2 - The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→p, γd→pn, and γd→d at forward production angles. A linearly polarized photon beam at Eγ=1.6-2.4 GeV was used for the production of mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed.

AB - The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→p, γd→pn, and γd→d at forward production angles. A linearly polarized photon beam at Eγ=1.6-2.4 GeV was used for the production of mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed.

UR - http://www.scopus.com/inward/record.url?scp=77955570696&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.82.015205

DO - 10.1103/PhysRevC.82.015205

M3 - Article

AN - SCOPUS:77955570696

SN - 0556-2813

VL - 82

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 1

M1 - 015205

ER -

Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this