Journal article

Publication year: 1997

Pages: 119-126

Journal: Zeitschrift für Physik C Particles and Fields

Volume number: 75

Issue number: 1

ISSN: 0170-9739

Open access status: Green

DOI Link: https://doi.org/10.1007/s002880050453

Publisher: Springer Verlag

Abstract: 
We investigate the production of e(+)e(-) pairs from p + Be and nucleus-nucleus collisions from 2 GeV/A to 200 GeV/A within a covariant transport approach and focus on the dilepton angular anisotropies as a function of the dilepton invariant mass. Whereas the low mass regime yields information about the Dalitz decays of the Delta, eta and omega, above M approximate to 0.5 GeV the angular anisotropies provide additional information about pi(+)pi(-) --> rho(0) --> e(+)e(-) channel in the medium. The anisotropy coefficient is found to change its sign for M > 0.5 GeV in case of nucleus-nucleus reactions when increasing the bombarding energy from 2 GeV/A to 200 GeV/A which sheds some light on the pi pi --> rho dynamics.

Harvard Citation style: Bratkovskaya, E., Cassing, W. and Mosel, U. (1997) Probing hadronic polarizations with dilepton anisotropies, Zeitschrift für Physik C Particles and Fields, 75(1), pp. 119-126. https://doi.org/10.1007/s002880050453

APA Citation style: Bratkovskaya, E., Cassing, W., & Mosel, U. (1997). Probing hadronic polarizations with dilepton anisotropies. Zeitschrift für Physik C Particles and Fields. 75(1), 119-126. https://doi.org/10.1007/s002880050453