Prof. Abner Soffer conducts experimental research in several areas of particle physics. He uses data collected by the ATLAS particle detector at the CERN laboratory in Switzerland to search for long-lived particles, such as heavy neutrinos or supersymmetric particles predicted by “new-physics” models. He also uses data collected by the recently constructed Belle-II detector in Japan to precisely measure properties of particles called bottom mesons, which are sensitive to effects of new physics. Until recently he also he used data from the older BABAR detector in California. For the past few years, Soffer has collaborated with Prof. Volansky at TAU and others on development of crystal-based detection of low-mass dark-matter detectors. Soffer also conducts phenomenology research, proposing new measurement methods that take advantage of existing or proposed capabilities of particle accelerators and detectors.