Journalartikel

Jahr der Veröffentlichung: 1999

Seiten: 919-927

Zeitschrift: Physical Review C

Bandnummer: 59

Heftnummer: 2

ISSN: 0556-2813

eISSN: 1089-490X

Open Access Status: Green

DOI Link: https://doi.org/10.1103/PhysRevC.59.919

Verlag: American Physical Society

Abstract: 
We present a dynamical study of e(+)e(-) production in pi(-)A reactions at 1.3 and 1.7 GeV on the basis of the coupled-channel-BUU approach. The contributions from vector mesons (rho,omega) are calculated taking into account the collisional broadening effect and are compared to background sources in the dilepton spectrum from the Dalitz decays of omega and eta mesons produced in the reaction. Two possible scenarios for the medium modifications of the vector mesons are investigated, i.e., the "dropping mass" scheme for the rho and omega and a momentum-dependent rho-meson spectral function that includes the polarization of the rho-meson due to resonant rho-N scattering. [S0556-2813(99)04502-1].

Harvard-Zitierstil: Weidmann, T., Bratkovskaya, E., Cassing, W. and Mosel, U. (1999) e+e- pairs from π-A reactions, Physical Review C, 59(2), pp. 919-927. https://doi.org/10.1103/PhysRevC.59.919

APA-Zitierstil: Weidmann, T., Bratkovskaya, E., Cassing, W., & Mosel, U. (1999). e+e- pairs from π-A reactions. Physical Review C. 59(2), 919-927. https://doi.org/10.1103/PhysRevC.59.919