Jean-Jacques Loeffel 1932-2013

摘要

Jean-Jacques Loeffel passed away from Alzheimer's disease on 22 April. He was 80 years old. Jean-Jacques was born in the "Jura bernois" in Bienne. He studied at ETH Zurich and began working on a PhD under Wolfgang Pauli. However, Pauli died at the end of 1958 so it was Res Jost who became his supervisor. In autumn 1962, Jost sent Jean-Jacques to CERN and it was then that we in the Theory Division discovered his immense talents. He played a major role in the collaboration that led to the KLM (Toichiro Kinoshita, Loeffel and André Martin) paper. This considerably improved the fixed-angle bound on the high-energy scattering amplitude compared with the previous result of Marcel Froissart, assuming the Mandelstam representation.