Charge asymmetry in alignment of atoms excited by protons and antiprotons V. V. Balashov, A. A. Sokolik and A. V. Stysin Eur. Phys. J. D, 41 2 (2007) 237-239 Published online: 25 October 2006 DOI: 10.1140/epjd/e2006-00237-5