Feasibility study of a 2 GeV lepton collider at DAFNE

While the main advances in the standard model probing require the construction of very high-energy colliders, many open questions still remain which can be answered by exploring low and medium energy regions. In this framework we are investigating the possibility of upgrading the /spl phi/-factory DA/spl phi/NE from the energy of 1.02 GeV c.m. up to the neutron-antineutron threshold (about 2 GeV c.m.) using the existing systems and structures. The luminosity required by the experiments for a light quark factory is of the order of few 10/sup 31/ cm/sup -2/ s/sup -1/, easily achievable in the particle factory era. The very first results of the feasibility study are presented.