First observation of in-medium modifications of the omega meson
Abstract
The photoproduction of omega mesons on nuclei has been investigated using the Crystal Barrel/TAPS experiment at the ELSA tagged photon facility in Bonn. The aim is to study possible in-medium modifications of the omega meson via the reaction A(gamma, omega)X. Results obtained for Nb are compared to a reference measurement on a liquid hydrogen target. While for recoiling, long-lived mesons (pi, eta and etaprime), which decay outside of the nucleus, a difference in the lineshape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons with low momenta produced on the Nb target.
Cite
@article{arxiv.nucl-ex/0504010,
title = {First observation of in-medium modifications of the omega meson},
author = {D. Trnka},
journal= {arXiv preprint arXiv:nucl-ex/0504010},
year = {2019}
}
Comments
Latex, 4 pages, 4 figures, accepted by Phys. Rev. Lett; references re-arranged, now references in chronological order in first paragraph