Friction of the surface plasmon by high-energy particle-hole pairs - Are memory effects important? C. Seoanez, G. Weick, R. A. Jalabert and D. Weinmann Eur. Phys. J. D, 44 2 (2007) 351-358 Published online: 20 June 2007 DOI: 10.1140/epjd/e2007-00195-4