Author/Authors :
Morales، نويسنده , , A. and Avignone III، نويسنده , , F.T. and Brodzinski، نويسنده , , R.L. and Cebri?n، نويسنده , , S. and Garc?́a، نويسنده , , E. and Gonz?lez، نويسنده , , D. and Irastorza، نويسنده , , I.G. and Miley، نويسنده , , H.S. and Morales، نويسنده , , J. and de Sol?rzano، نويسنده , , A.Ortiz and Puimed?n، نويسنده , , J. H. Reeves، نويسنده , , J.H. and Sarsa، نويسنده , , M.L. and Scopel، نويسنده , , S. and Villar، نويسنده , , J.A.، نويسنده ,
Abstract :
A small, natural abundance, germanium detector (COSME) has been operating recently at the Canfranc Underground Laboratory (Spanish Pyrenees) in improved conditions of shielding and overburden with respect to a previous operation of the same detector (Nucl. Instrum. Meth. A 321 (1992) 410; Phys. Rev. D 51 (1995) 1458). An exposure of 72.7 kg day in these conditions has at present a background improvement of about one order of magnitude compared to the former operation of the detector. These new data have been applied to a direct search for weakly interacting massive particles (WIMPs) and solar axions. New WIMP exclusion plots improving the current bounds for low masses are reported. The paper also presents a limit on the axion–photon coupling obtained from the analysis of the data looking for a Primakoff axion-to-photon conversion and Bragg scattering inside the crystal.
Keywords :
Dark matter , Underground detectors , Weakly interacting massive particles , Axions
