Eur. Phys. J. A 10, 101-107
Probing meson spectral functions with double differential dilepton spectra in heavy-ion collisionsB. Kämpfer1 and O.P. Pavlenko1, 2
1 Forschungszentrum Rossendorf, PF 510119, 01314 Dresden, Germany
2 Institute for Theoretical Physics, 252143 Kiev - 143, Ukraine
(Received: 16 November 2000 / Revised version: 8 January 2001 Communicated by A. Schäfer)
The double differential dilepton spectrum at fixed transverse mass allows a direct access to the vector meson spectral functions. Within a fireball model the sensitivity of against variations of both the in-medium properties of mesons and the dynamics of the fireball is investigated. In contrast to the integrated invariant-mass spectrum dN/dM2, in the spectrum with fixed the signal is clearly seen as bump riding on the background even in case of strong in-medium modifications.
25.75.-q - Relativistic heavy-ion collisions.
25.75.Dw - Particle and resonance production.
24.10.Cn - Hydrodynamic models.
© Società Italiana di Fisica, Springer-Verlag 2001