Experimental Signature of Medium Modifications for rho and omega Mesons
  in the 12 GeV p + A Reactions

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

research

Experimental Signature of Medium Modifications for rho and omega Mesons in the 12 GeV p + A Reactions

Authors: J. Chiba
H. En'yo
Y. Fukao
H. Funahashi
H. Hamagaki
M. Ieiri
M. Ishino
H. Kanda
M. Kitaguchi
S. Mihara
K. Miwa
T. Miyashita
T. Murakami
R. Muto
T. Nakura
M. Naruki
K. Ozawa
F. Sakuma
O. Sasaki
M. Sekimoto
T. Tabaru
K. H. Tanaka
M. Togawa
S. Yamada
S. Yokkaichi
Y. Yoshimura
Publication date: 15 March 2006
Publisher: 'American Physical Society (APS)'
Doi

Abstract

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 omega 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.Comment: 4 pages, 3 figures, Version accepted for Physical Review Lette

Similar works

Full text

Available Versions

Crossref

Last time updated on 03/01/2020