| Ragazzi Stefano | Universita di Milano-Bicocca | Italy |
| Rahatlou Shahram | University of California, San Diego | USA |
| Ramberg Erik | Fermi National Accelerator Laboratory | USA |
| Ramirez Eduardo | University of Puerto Rico, Mayaguez | USA |
| Rani K. Jyotshna | Tata Institute of Fundamental Research | India |
| Rapidis Petros | Fermi National Accelerator Laboratory | USA |
| Rapin Divic | University of Geneva | Switzerland |
| Ratoff Peter | Lancaster University | UK |
| Raven Gerhard | NIKHEF & VU Amsterdam | Netherlands |
| Ray Heather | University of Michigan | USA |
| Ray Rashmi | American Physical Society | USA |
| Ray Ron | Fermi National Acclerator Laboratory | USA |
| Recksiegel Stefan | Technische Universitaet Muenchen | Germany |
| Reed Daniel | University of Illinois, Urbana-Champaign | USA |
| Reidy James | U.S. Department of Energy | USA |
| Repko Wayne | Michigan State University | USA |
| Repond Jose | Argonne National Laboratory | USA |
| Reyna David | Argonne National Laboratory | USA |
| Riazuddin Riaz | National Center for Physics | Pakistan |
| Richard Francois | CNRS/IN2P3 | France |
| Riesselmann Kurt | Fermi National Accelerator Laboratory | USA |
| Ritchie Jack | University of Texas, Austin | USA |
| Riu Imma | University of Geneva | Switzerland |
| Roberts B. Lee | Boston University | USA |
| Rodriguez Lopez Jairo Alexis | Universidad Nacional de Colombia | Colombia |
| Rosen Jerome | Northwestern University | USA |
| Rosen Peter | U.S. Department of Energy | USA |
| Rosenfeld Rogerio | Universidade Estadual de Paulista -- UNESP | Brazil |
| Rosner Jonathan | University of Chicago | USA |
| Rott Carsten | Purdue University | USA |
| Roulet Esteban | CONICET (National Council of Scientific Research) | Argentina |
| Rovelli Tiziano | Bologna University & INFN | Italy |
| Roy Probir | Tata Institute of Fundamental Research | India |
| Rubinstein Roy | Fermi National Accelerator Laboratory | USA |
| Ruchti Randy | University of Notre Dame | USA |
| Rumerio Paolo | Northwestern University | USA |