First measurement of the ϱ spectral function in nuclear collisions R. Arnaldi, R. Averbeck, K. Banicz, J. Castor, B. Chaurand, C. Cicalo, A. Colla, P. Cortese, S. Damjanovic, A. David et al. (40 more) Eur. Phys. J. C, 49 1 (2007) 235-241 Published online: 02 December 2006 DOI: 10.1140/epjc/s10052-006-0060-2