On a further search for a yearly modulation of the rate in particle Dark Matter direct search

摘要

The results achieved with a statistics of 14962 kg centre dot day, collected with the large mass highly radiopure DAMA NaI(T1) set-up, are described and investigated in terms of WIMP annual modulation signature. A maximum likelihood analysis of these data, combined with the statistics of 4549 kg centre dot day previously published (total statistics of 19511 kg centre dot day), favours the hypothesis of presence of an annual modulation at 99.6% C. L.