Experimental signature of medium modifications for ρ and ω mesons in the 12 GeV p+A reactions

M. Naruki, 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, H. En'yo, R. Muto, T. Tabaru, S. Yokkaichi, J. ChibaM. Ieiri, O. Sasaki, M. Sekimoto, K. H. Tanaka, H. Hamagaki, K. Ozawa

研究成果: Article査読

195 被引用数 (Scopus)

抄録

The invariant mass spectra of e+e- pairs produced in 12 GeV proton-induced nuclear reactions are measured at the KEK Proton Synchrotron. On the low-mass side of the ω meson peak, a significant enhancement over the known hadronic sources has been observed. The mass spectra, including the excess, are well reproduced by a model that takes into account the density dependence of the vector meson mass modification, as theoretically predicted.

本文言語English
論文番号092301
ジャーナルPhysical review letters
96
9
DOI
出版ステータスPublished - 2006
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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