1. General Seminars

Subthreshold studies: AMADEUS and other methods

by Prof. Slawomir Wycech (NCBJ)

Abstract Several interesting hadronic states H are believed to be quasi-bound states of two hadrons. Typical examples are : baryonium and Λ(1405). These are localized below thresholds of these two hadrons and an experimental access is difficult. Frequently it is also complicated by many decay channels. To reach below threshold one needs bound nucleons, that is few nucleon systems, or final state interactions. These usually allow to study H in inelastic processes but the description is technically involved . Extraction of elastic amplitude related to H is more difficult. I will try to present briefly some possibilities and, next concentrate on few results from AMADEUS Step0