Measurement of the H/A cross sectionand possible constraints on tan R. Kinnunen, S. Lehti, F. Moortgat, A. Nikitenko and M. Spira Eur. Phys. J. C, 40 S1 (2005) 23-32 Published online: 15 May 2005 DOI: 10.1140/epjcd/s2005-02-003-3