Medium modification on 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:10.1063/1.2402687

Medium modification on 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

研究成果: Conference contribution

抄録

The invariant mass spectra of e⁺e^- pairs produced in 12 GeV p+A reactions are measured at the KEK-PS. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak. The 95 % C.L. 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.

本文言語	English
ホスト出版物のタイトル	INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS
ホスト出版物のサブタイトル	9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006
ページ	503-505
ページ数	3
DOI	https://doi.org/10.1063/1.2402687
出版ステータス	Published - 2006
外部発表	はい
イベント	INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 - Rio Grande, Puerto Rico 継続期間: 2006 5月 30 → 2006 6月 3

出版物シリーズ

名前	AIP Conference Proceedings
巻	870
ISSN（印刷版）	0094-243X
ISSN（電子版）	1551-7616

Other

Other	INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006
国/地域	Puerto Rico
City	Rio Grande
Period	06/5/30 → 06/6/3

ASJC Scopus subject areas

物理学および天文学（全般）

文献へのアクセス

10.1063/1.2402687

他のファイルとリンク

引用スタイル

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. (2006). Medium modification on vector mesons observed in 12 GeV p + A reactions. In INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 (pp. 503-505). (AIP Conference Proceedings; Vol. 870). https://doi.org/10.1063/1.2402687

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 2006, Medium modification on vector mesons observed in 12 GeV p + A reactions. in INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006. AIP Conference Proceedings, vol. 870, pp. 503-505, INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006, Rio Grande, Puerto Rico, 06/5/30. https://doi.org/10.1063/1.2402687

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title = "Medium modification on 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-PS. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak. The 95 % C.L. 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.",

keywords = "Mass, Meson, Modification, Omega, Phi, Rho",

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 = "2006",

doi = "10.1063/1.2402687",

language = "English",

isbn = "0735403686",

series = "AIP Conference Proceedings",

pages = "503--505",

booktitle = "INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS",

note = "INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 ; Conference date: 30-05-2006 Through 03-06-2006",

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TY - GEN

T1 - Medium modification on 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 - 2006

Y1 - 2006

N2 - The invariant mass spectra of e+e- pairs produced in 12 GeV p+A reactions are measured at the KEK-PS. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak. The 95 % C.L. 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-PS. We observed a significant enhancement over the known hadronic sources on the low-mass side of the ω meson peak. The 95 % C.L. 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.

KW - Mass

KW - Meson

KW - Modification

KW - Omega

KW - Phi

KW - Rho

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U2 - 10.1063/1.2402687

DO - 10.1063/1.2402687

M3 - Conference contribution

AN - SCOPUS:33846951489

SN - 0735403686

SN - 9780735403680

T3 - AIP Conference Proceedings

SP - 503

EP - 505

BT - INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS

T2 - INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006

Y2 - 30 May 2006 through 3 June 2006

ER -

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

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