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Modification of the omega-meson lifetime in nuclear matter.
- Source :
-
Physical review letters [Phys Rev Lett] 2008 May 16; Vol. 100 (19), pp. 192302. Date of Electronic Publication: 2008 May 13. - Publication Year :
- 2008
-
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.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 100
- Issue :
- 19
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 18518443
- Full Text :
- https://doi.org/10.1103/PhysRevLett.100.192302