Search for narrow resonances lighter than ϒ mesons CDF Collaboration, T. Aaltonen, J. Adelman, T. Akimoto, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos et al. (590 more) Eur. Phys. J. C, 62 2 (2009) 319-326 Published online: 28 May 2009 DOI: 10.1140/epjc/s10052-009-1057-4