Observation of rho/omega meson modification in nuclear matter

Authors
Ozawa, K En'yo, H Funahashi, H Kitaguchi, M Ishino, M Kanda, H Mihara, S Miyashita, T Murakami, T Muto, R Naruki, M Sakuma, F Sato, HD Tabaru, T Yamada, S Yokkaichi, S Yoshimura, Y Chiba, J Ieiri, M Nomachi, M Sasaki, O Sekimoto, M Tanaka, KH Hamagaki, H
Citation
K. Ozawa et al., Observation of rho/omega meson modification in nuclear matter, PHYS REV L, 86(22), 2001, pp. 5019-5022
Citations number
13
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
22
Year of publication
2001
Pages
5019 - 5022
Database
ISI
SICI code
0031-9007(20010528)86:22<5019:OORMMI>2.0.ZU;2-H
Abstract
We measured the invariant mass spectra of electron-positron pairs in the ta rget rapidity region of 12-GeV p + A reactions. We have observed a signific ant difference in the mass spectra below the omega mason between p + C and p + Cu interactions. This difference indicates that the spectral shape of m asons is modified at normal nuclear-matter density.