Details

Autor(en) / Beteiligte

• Kotulla, M
• Trnka, D
• Mühlich, P
• Anton, G
• Bacelar, J C S
• Bartholomy, O
• Bayadilov, D
• Beloglazov, Y A
• Bogendörfer, R
• Castelijns, R
• Crede, V
• Dutz, H
• Ehmanns, A
• Elsner, D
• Ewald, R
• Fabry, I
• Fuchs, M
• Essig, K
• Funke, Ch
• Gothe, R
• Gregor, R
• Gridnev, A B
• Gutz, E
• Höffgen, S
• Hoffmeister, P
• Horn, I
• Hössl, J
• Jaegle, I
• Junkersfeld, J
• Kalinowsky, H
• Klein, Frank
• Klein, Fritz
• Klempt, E
• Konrad, M
• Kopf, B
• Krusche, B
• Langheinrich, J
• Löhner, H
• Lopatin, I V
• Lotz, J
• Lugert, S
• Menze, D
• Messchendorp, J G
• Mertens, T
• Metag, V
• Mosel, U
• Nanova, M
• Novotny, R
• Ostrick, M
• Pant, L M
• van Pee, H
• Pfeiffer, M
• Roy, A
• Radkov, A
• Schadmand, S
• Schmidt, Ch
• Schmieden, H
• Schoch, B
• Shende, S
• Suft, G
• Sumachev, V V
• Szczepanek, T
• Süle, A
• Thoma, U
• Varma, R
• Walther, D
• Weinheimer, Ch
• Wendel, Ch

Titel

Modification of the omega-meson lifetime in nuclear matter

Ist Teil von

• Physical review letters, 2008-05, Vol.100 (19), p.192302-192302, Article 192302

Ort / Verlag

United States

Erscheinungsjahr

2008

Quelle

American Physical Society

Beschreibungen/Notizen

• Information on hadron properties in the nuclear medium has been derived from the photoproduction of omega mesons on the nuclei C, Ca, Nb, and Pb using the Crystal Barrel/TAPS detector at the ELSA tagged photon facility in Bonn. The dependence of the omega-meson cross section on the nuclear mass number has been compared with three different types of models: a Glauber analysis, a Boltzmann-Uehling-Uhlenbeck analysis of the Giessen theory group, and a calculation by the Valencia theory group. In all three cases, the inelastic omega width is found to be 130-150 MeV/c(2) at normal nuclear matter density for an average 3-momentum of 1.1 GeV/c. In the rest frame of the omega meson, this inelastic omega width corresponds to a reduction of the omega lifetime by a factor approximately 30. For the first time, the momentum dependent omegaN cross section has been extracted from the experiment and is in the range of 70 mb.