Journal article

Publication year: 2001

Pages: 237-245

Journal: The European Physical Journal A

Volume number: 11

Issue number: 2

ISSN: 1434-6001

eISSN: 1434-601X

DOI Link: https://doi.org/10.1007/s100500170088

Publisher: Springer

Abstract: 
The omega resonance production and its pi (o)gamma decay in pA reactions close to threshold is considered within the Intranuclear Cascade (INC) model. The pi (o)gamma invariant-mass distribution shows two components which correspond to the w decay "inside" and "outside" the nucleus, respectively. The "inside" component is distorted by medium effects, which introduce a mass shift as well as collisional broadening for the omega -meson and its decaying pion. The relative contribution of the "inside" component is analyzed in detail for different kinematical conditions and nuclear targets. It is demonstrated that a measurement of the correlation in azimuthal angle between the pi (o) and gamma momenta allows to separate events related to the "inside" omega decay from different sources of background when uncorrelated pi (o)'s and gamma 's are produced.

Harvard Citation style: Golubeva, Y., Kondratyuk, L., Büscher, M., Cassing, W., Hejny, V. and Ströher, H. (2001) Medium effects in the production and π⁰γ decay of ω-mesons in pA collisions in the GeV region, The European Physical Journal A, 11(2), pp. 237-245. https://doi.org/10.1007/s100500170088

APA Citation style: Golubeva, Y., Kondratyuk, L., Büscher, M., Cassing, W., Hejny, V., & Ströher, H. (2001). Medium effects in the production and π⁰γ decay of ω-mesons in pA collisions in the GeV region. The European Physical Journal A. 11(2), 237-245. https://doi.org/10.1007/s100500170088