Modification of the $\omega$-Meson Lifetime in Nuclear Matter
Abstract
The photo production of mesons on the nuclei C, Ca, Nb and Pb has been measured using the Crystal Barrel/TAPS detector at the ELSA tagged photon facility in Bonn. The dependence of the meson cross section on the nuclear mass number has been compared with three different types of models, a Glauber analysis, a BUU analysis of the Giessen theory group and a calculation by the Valencia theory group. In all three cases, the inelastic width is found to be at normal nuclear matter density for an average 3-momentum of 1.1 GeV/c. In the restframe of the meson, this inelastic width corresponds to a reduction of the lifetime by a factor . For the first time, the momentum dependent N cross section has been extracted from the experiment and is in the range of 70 mb.
Cite
@article{arxiv.0802.0989,
title = {Modification of the $\omega$-Meson Lifetime in Nuclear Matter},
author = {M. Kotulla and D. Trnka and P. Mühlich and G. Anton and J. C. S. Bacelar and O. Bartholomy and D. Bayadilov and Y. A. Beloglazov and R. Bogendörfer and R. Castelijns and V. Crede and H. Dutz and A. Ehmanns and D. Elsner and R. Ewald and I. Fabry and M. Fuchs and K. Essig and Ch. Funke and R. Gothe and R. Gregor and A. B. Gridnev and E. Gutz and S. Höffgen and P. Hoffmeister and I. Horn and J. Hössl and I. Jaegle and J. Junkersfeld and H. Kalinowsky and Frank Klein and Fritz Klein and E. Klempt and M. Konrad and B. Kopf and B. Krusche and J. Langheinrich and H. Löhner and I. V. Lopatin and J. Lotz and S. Lugert and D. Menze and J. G. Messchendorp and T. Mertens and V. Metag and U. Mosel and M. Nanova and R. Novotny and M. Ostrick and L. M. Pant and H. van Pee and M. Pfeiffer and A. Roy and A. Radkov and S. Schadmand and Ch. Schmidt and H. Schmieden and B. Schoch and S. Shende and G. Suft and V. V. Sumachev and T. Szczepanek and A. Süle and U. Thoma and R. Varma and D. Walther and Ch. Weinheimer and Ch. Wendel},
journal= {arXiv preprint arXiv:0802.0989},
year = {2008}
}
Comments
5 pages, 4 figures