Modification of the omega-meson lifetime in nuclear matter

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

doi:10.1103/PhysRevLett.100.192302

Modification of the omega-meson lifetime in nuclear matter

Phys Rev Lett. 2008 May 16;100(19):192302. doi: 10.1103/PhysRevLett.100.192302. Epub 2008 May 13.

Authors

M Kotulla¹, D Trnka, P Mühlich, G Anton, J C S Bacelar, O Bartholomy, D Bayadilov, Y A Beloglazov, R Bogendörfer, R Castelijns, V Crede, H Dutz, A Ehmanns, D Elsner, R Ewald, I Fabry, M Fuchs, K Essig, Ch Funke, R Gothe, R Gregor, A B Gridnev, E Gutz, S Höffgen, P Hoffmeister, I Horn, J Hössl, I Jaegle, J Junkersfeld, H Kalinowsky, Frank Klein, Fritz Klein, E Klempt, M Konrad, B Kopf, B Krusche, J Langheinrich, H Löhner, I V Lopatin, J Lotz, S Lugert, D Menze, J G Messchendorp, T Mertens, V Metag, U Mosel, M Nanova, R Novotny, M Ostrick, L M Pant, H van Pee, M Pfeiffer, A Roy, A Radkov, S Schadmand, Ch Schmidt, H Schmieden, B Schoch, S Shende, G Suft, V V Sumachev, T Szczepanek, A Süle, U Thoma, R Varma, D Walther, Ch Weinheimer, Ch Wendel

Affiliation

¹ II Physikalisches Institut, Universität Giessen, Giessen, Germany.

PMID: 18518443
DOI: 10.1103/PhysRevLett.100.192302

Abstract

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.