Medium modification of vector mesons observed in 12 GeV p+A reactions

M. Naruki; H. En'Yo; R. Muto; T. Tabaru; S. Yokkaichi; Y. Fukao; H. Funahashi; M. Ishino; H. Kanda; M. Kitaguchi; S. Mihara; K. Miwa; T. Miyashita; T. Murakami; T. Nakura; F. Sakuma; M. Togawa; S. Yamada; Y. Yoshimura; J. Chiba; M. Ieiri; O. Sasaki; M. Sekimoto; K. H. Tanaka; H. Hamagaki; K. Ozawa

doi:10.1088/0954-3899/34/8/S156

Medium modification of vector mesons observed in 12 GeV p+A reactions

M. Naruki, H. En'Yo, R. Muto, T. Tabaru, S. Yokkaichi, Y. Fukao, H. Funahashi, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, F. Sakuma, M. Togawa, S. Yamada, Y. Yoshimura, J. ChibaM. Ieiri, O. Sasaki, M. Sekimoto, K. H. Tanaka, H. Hamagaki, K. Ozawa

SCI - Physics

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

3 Citations (Scopus)

Abstract

The invariant mass spectra of e⁺e^- pairs produced in 12 GeV p+A reactions are measured at the KEK Proton Synchrotron. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak for C and Cu data. The 95% CL allowed parameter regions for ρ/ω ratio are obtained as ρ/ω< 0.15 and ρ/ω< 0.31 for C and Cu targets, respectively. As for the meson, the data obtained with a Cu target revealed a significant excess on the low-mass side of the meson peak mainly in the βγ < 1.25 region.

Original language	English
Article number	S156
Pages (from-to)	S1059-S1063
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	34
Issue number	8
DOIs	https://doi.org/10.1088/0954-3899/34/8/S156
Publication status	Published - 2007 Aug 1

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Naruki, M., En'Yo, H., Muto, R., Tabaru, T., Yokkaichi, S., Fukao, Y., Funahashi, H., Ishino, M., Kanda, H., Kitaguchi, M., Mihara, S., Miwa, K., Miyashita, T., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., ... Ozawa, K. (2007). Medium modification of vector mesons observed in 12 GeV p+A reactions. Journal of Physics G: Nuclear and Particle Physics, 34(8), S1059-S1063. Article S156. https://doi.org/10.1088/0954-3899/34/8/S156

@article{cbb1682bae7e4a2690dd14fd5830502e,

title = "Medium modification of vector mesons observed in 12 GeV p+A reactions",

abstract = "The invariant mass spectra of e+e- pairs produced in 12 GeV p+A reactions are measured at the KEK Proton Synchrotron. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak for C and Cu data. The 95% CL allowed parameter regions for ρ/ω ratio are obtained as ρ/ω< 0.15 and ρ/ω< 0.31 for C and Cu targets, respectively. As for the meson, the data obtained with a Cu target revealed a significant excess on the low-mass side of the meson peak mainly in the βγ < 1.25 region.",

author = "M. Naruki and H. En'Yo and R. Muto and T. Tabaru and S. Yokkaichi and Y. Fukao and H. Funahashi and M. Ishino and H. Kanda and M. Kitaguchi and S. Mihara and K. Miwa and T. Miyashita and T. Murakami and T. Nakura and F. Sakuma and M. Togawa and S. Yamada and Y. Yoshimura and J. Chiba and M. Ieiri and O. Sasaki and M. Sekimoto and Tanaka, {K. H.} and H. Hamagaki and K. Ozawa",

year = "2007",

month = aug,

day = "1",

doi = "10.1088/0954-3899/34/8/S156",

language = "English",

volume = "34",

pages = "S1059--S1063",

journal = "Journal of Physics G: Nuclear and Particle Physics",

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Naruki, M, En'Yo, H, Muto, R, Tabaru, T, Yokkaichi, S, Fukao, Y, Funahashi, H, Ishino, M, Kanda, H, Kitaguchi, M, Mihara, S, Miwa, K, Miyashita, T, Murakami, T, Nakura, T, Sakuma, F, Togawa, M, Yamada, S, Yoshimura, Y, Chiba, J, Ieiri, M, Sasaki, O, Sekimoto, M, Tanaka, KH, Hamagaki, H & Ozawa, K 2007, 'Medium modification of vector mesons observed in 12 GeV p+A reactions', Journal of Physics G: Nuclear and Particle Physics, vol. 34, no. 8, S156, pp. S1059-S1063. https://doi.org/10.1088/0954-3899/34/8/S156

TY - JOUR

T1 - Medium modification of vector mesons observed in 12 GeV p+A reactions

AU - Naruki, M.

AU - En'Yo, H.

AU - Muto, R.

AU - Tabaru, T.

AU - Yokkaichi, S.

AU - Fukao, Y.

AU - Funahashi, H.

AU - Ishino, M.

AU - Kanda, H.

AU - Kitaguchi, M.

AU - Mihara, S.

AU - Miwa, K.

AU - Miyashita, T.

AU - Murakami, T.

AU - Nakura, T.

AU - Sakuma, F.

AU - Togawa, M.

AU - Yamada, S.

AU - Yoshimura, Y.

AU - Chiba, J.

AU - Ieiri, M.

AU - Sasaki, O.

AU - Sekimoto, M.

AU - Tanaka, K. H.

AU - Hamagaki, H.

AU - Ozawa, K.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - The invariant mass spectra of e+e- pairs produced in 12 GeV p+A reactions are measured at the KEK Proton Synchrotron. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak for C and Cu data. The 95% CL allowed parameter regions for ρ/ω ratio are obtained as ρ/ω< 0.15 and ρ/ω< 0.31 for C and Cu targets, respectively. As for the meson, the data obtained with a Cu target revealed a significant excess on the low-mass side of the meson peak mainly in the βγ < 1.25 region.

AB - The invariant mass spectra of e+e- pairs produced in 12 GeV p+A reactions are measured at the KEK Proton Synchrotron. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak for C and Cu data. The 95% CL allowed parameter regions for ρ/ω ratio are obtained as ρ/ω< 0.15 and ρ/ω< 0.31 for C and Cu targets, respectively. As for the meson, the data obtained with a Cu target revealed a significant excess on the low-mass side of the meson peak mainly in the βγ < 1.25 region.

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DO - 10.1088/0954-3899/34/8/S156

M3 - Article

AN - SCOPUS:34547449251

SN - 0954-3899

VL - 34

SP - S1059-S1063

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 8

M1 - S156

ER -

Medium modification of vector mesons observed in 12 GeV p+A reactions

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