Mass bounds on a very light neutralino Herbi K. Dreiner, Sven Heinemeyer, Olaf Kittel, Ulrich Langenfeld, Arne M. Weber and Georg Weiglein Eur. Phys. J. C, 62 3 (2009) 547-572 Published online: 27 May 2009 DOI: 10.1140/epjc/s10052-009-1042-y