Study of in-medium meson modification in 12 GeV p+A reactions

被引：2

作者：

Yokkaichi, S.

En'yo, H.

Naruki, M.

Muto, R.

Tabaru, T.

Chiba, J.

Ieiri, M.

Sekimoto, M.

Sasaki, O.

Tanaka, K. H.

Funahashi, H.

Fukao, Y.

Kitaguchi, M.

Ishino, M.

Kanda, H.

Mihara, S.

Miyashita, T.

Miwa, K.

Murakami, T.

Nakura, T.

Sakuma, F.

Togawa, M.

Yamada, S.

Yoshimura, Y.

Hamagaki, H.

Ozawa, K.

机构：

[1] RIKEN, Wako, Saitama 3510198, Japan

[2] KEK, IPNS, Tsukuba, Ibaraki 3050801, Japan

[3] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[4] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Tokyo 1130033, Japan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2007年 / 22卷 / 2-3期

关键词：

vector meson; mass modification; nuclear matter;

D O I：

10.1142/S0217751X07035586

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Invariant mass spectra of low- mass vector mesons in the e(+) e(-) channel are measured in 12 GeV p + C and p + Cu reactions (root s = 5.1 GeV) at the KEK Proton Synchrotron. Significant excess is observed at the low- mass side of omega meson peak over the known hadronic sources both in the C and Cu target data. Also below the phi meson peak, an excess is found in the Cu target data for slowly moving mesons whose beta gamma is less than 1.25. They can be interpreted as signatures of the spectral modi. cation of vector mesons in cold nuclear matter.

引用

页码：397 / 405

页数：9

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