Physics beyond the Standard model: experiments at the Gran Sasso Laboratory

Underground laboratory experiments have yielded convincing evidence for physics beyond the standard model. The anomalies observed in solar electron neutrino fluxes and atmospheric muon neutrino data can be explained if neutrinos have mass and oscillate. The physics research program we are currently planning at the Gran Sasso Laboratory ushers neutrino studies into a new stage, in which experiments on CERN-s muon-neutrino beam (CNGS project) as well as on solar, atmospheric, and supernova-produced neutrinos will be involved.The relevant thermonuclear cross section will be measured. The Majorana vs. Dirac nature of electron neutrinos will be explored be searching for neutrino-less double beta decays in different isotopes. In the coming years, efforts at increasing sensitivity by orders of magnitude through the use of additional techniques will be undertaken as part of the program