New limits on dark--matter WIMPs from the Heidelberg--Moscow experiment

Authors :: Baudis, L.
Hellmig, J.
Heusser, G.
Klapdor--Kleingrothaus, H. V.
Kolb, S.
Majorovits, B.
Päs, H.
Ramachers, Y.
Strecker, H.
Alexeev, V.
Bakalyarov, A.
Balysh, A.
Belyaev, S. T.
Lebedev, V. I.
Zhukov, S.
Baudis, L.
Hellmig, J.
Heusser, G.
Klapdor--Kleingrothaus, H. V.
Kolb, S.
Majorovits, B.
Päs, H.
Ramachers, Y.
Strecker, H.
Alexeev, V.
Bakalyarov, A.
Balysh, A.
Belyaev, S. T.
Lebedev, V. I.
Zhukov, S.
Publication Year :: 1998
Abstract: New results after 0.69 kg yr of measurement with an enriched 76Ge detector of the Heidelberg--Moscow experiment with an active mass of 2.758 kg are presented. An energy threshold of 9 keV and a background level of 0.042 counts/(kg d keV) in the energy region between 15 keV and 40 keV was reached.The derived limits on the WIMP--nucleon cross section are the most stringent limits on spin--independent interactions obtained to date by using essentially raw data without background subtraction.<br />Comment: 8 pages (latex) including 5 postscript figures and 2 tables. To appear in Phys. Rev. D, 15. December 1998