DAMA: an observatory for rare processes @LNGS Roma2, Roma, LNGS, IHEP/Beijing DAMA site @ www.lngs.infn.it DAMA: an observatory for rare processes @LNGS low bckg Ge for sampling meas. LXe R&D NaI(Tl) LIBRA

DAMA/LXe experiment: results on rare processes NIMA482(2002)728 Recent DARK MATTER investigations ... Limits on recoils investigating the WIMP-129Xe elastic scattering by means of Pulse Shape Discrimination PLB436(1998)379 Limits on WIMP-129Xe inelastic scattering PLB387(1996)222, NJP2(2000)15.1 Neutron calibration PLB436(1998)379, EPJdirectC11(2001)1 129Xe vs 136Xe by using PSD  comparing SD vs SI signal to increase the sensitivity on the SD component data taking ... other rare processes Nuclear level excitation of 129Xe during CNC processes PLB465(1999)315 . Nucleon and di-nucleon decay into invisible channels PLB493(2000)12 Electron decay e-  neg PRD61(2000)117301 2b decay in 134Xe PLB527(2002)182 Improved results on 2b in 134Xe and 136Xe PLB546(2002)23

DAMA/R&D set-up: results on rare processes WIMPs: WIMP search with CaF2(Eu) Astrop.Phys.7(1999)73 Other rare process: 2b decay in 136Ce and in 142Ce Il Nuov.Cim.A110(1997)189 2EC2n 40Ca decay using CaF2(Eu) scintillator Astrop.Phys.7(1999)73 2b decay in 46Ca and in 40Ca NPB563(1999)97 2b+ decay in 106Cd Astrop.Phys.10(1999)115 2b and b decay in 48Ca NPA705(2002)29 2EC2n in 136Ce and in 138Ce and a decay in 142Ce NIMA498(2003)352 The R&D shield closed The R&D shield open Fulfilling the inner Cu box

~100 kg NaI(Tl) DAMA set-up: data taking completed on July 2002 Performances: N.Cim.A112(1999)545 Results on rare processes: Possible Pauli exclusion principle violation PLB408(1997)439 Nuclear level excitation of 127I and 23Na during CNC processes PRC60(1999)065501 Electron stability and non-paulian transitions in Iodine atoms (by L-shell) PLB460(1999)235 Exotic Dark Matter search PRL83(1999)4918 Search for solar axions by Primakoff effect in NaI(Tl) crystals PLB515(2001)6 Exotic Matter search EPJdirect C14(2002)1 NaI(Tl) detectors Results on WI MPS: PSD: PLB389(1996)757 Investigation on diurnal effect: N.Cim.A112(1999)1541 Annual Modulation Signature: PLB424(1998)195, PLB450(1999)448, PRD61(1999)023512, PLB480(2000)23, PLB509(2001)197, EPJ C18(2000)283, EPJ C23 (2002)61, PRD66(2002)043503 Model independent evidence for WIMPs in galactic halo by annual modulation signature 57986 kgd The several peculiar features of the signature satisfied; no systematics or side reactions able to mimic it (see e.g. EPJC18(2000)283)+ some of the many possible model frameworks investigated in the corollary quests for a candidate other 49745 kg d (3 cycles) will be presented in few days @LNGS for a total exposure of: 107731 kgd

The new LIBRA set-up ~250 kg NaI(Tl) (Large sodium Iodide Bulk for RAre processes) in the DAMA experiment running since March 2003 As a result of a new R&D for radiopurer NaI(Tl) by exploiting new chemical/physical radiopurification techniques (all operations involving crystals and PMTs - including photos - in HP Nitrogen atmosphere) PMT +HV divider storing new crystals Improving installation etching staff at work Installing LIBRA detectors

DAMA/LIBRA (~250 kg NaI(Tl)) running and looking forward: Summary Successfully running ~100kg NaI(Tl), 6.5 kg LXe and R&D set-ups over many years Many rare processes investigated with all the set-ups LXe alternatively running with 129Xe and 136Xe R&D set-up running with small scale expts 100 kg NaI(Tl): 4 annual cycles released (~60000 kg day)  Model independent analysis: presence of annual modulation with the proper features; neither systematics nor side reactions able to mimic the signature Model dependent analyses: pure SI coupling, pure SD, mixed SI/SD, WIMP with preferred inelastic scattering in some of the possible model frameworks + studies on the uncertainties of the parameters and on the assumptions + halo models + many other possibilities under study New data to be presented on July 21, 2003 @LNGS (~110000 kg day) -- set-up out of operation on July 2002 From an improved R&D for radiopurity DAMA/LIBRA (~250 kg NaI(Tl)) running and looking forward: a new R&D for further radiopurifications started, toward 1 ton set-up we proposed in 1996