Testing the radio halo-cluster merger scenario - The case of RXC J2003.5–2323 S. Giacintucci, T. Venturi, G. Brunetti, D. Dallacasa, P. Mazzotta, R. Cassano, S. Bardelli and E. Zucca A&A, 505 1 (2009) 45-53 Published online: 15 June 2009 DOI: 10.1051/0004-6361/200912301