Title of article
First results from a dark matter search with liquid argon at 87 K in the Gran Sasso underground laboratory
Author/Authors
Benetti، نويسنده , , P. and Acciarri، نويسنده , , R. and Adamo، نويسنده , , F. and Baibussinov، نويسنده , , B. and Baldo-Ceolin، نويسنده , , M. and Belluco، نويسنده , , M. and Calaprice، نويسنده , , F. and Calligarich، نويسنده , , E. and Cambiaghi، نويسنده , , M. and Carbonara، نويسنده , , F. and Cavanna، نويسنده , , F. and Centro، نويسنده , , S. and Cocco، نويسنده , , A.G. and Di Pompeo، نويسنده , , F. and Ferrari، نويسنده , , N. and Fiorillo، نويسنده , , G. and Galbiati، نويسنده , , C. and Gallo، نويسنده , , V. De Grandi، نويسنده , , L. and Ianni، نويسنده , , A. and Mangano، نويسنده , , G. and Meng، نويسنده , , G. and Montanari، نويسنده , , C. and Palamara، نويسنده , , O. and Pandola، نويسنده , , L. and Pietropaolo، نويسنده , , F. and Raselli، نويسنده , , G.L. and Rossella، نويسنده , , M. and Rubbia، نويسنده , , C. and Szelc، نويسنده , , A.M. and Ventura، نويسنده , , S. and Vignoli، نويسنده , , C.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
13
From page
495
To page
507
Abstract
A new method of searching for dark matter in the form of weakly interacting massive particles (WIMP) has been developed with the direct detection of the low energy nuclear recoils observed in a massive target (ultimately many tons) of ultra pure liquid argon at 87 K. A high selectivity for argon recoils is achieved by the simultaneous observation of both the VUV scintillation luminescence and of the electron signal surviving columnar recombination, extracted through the liquid–gas boundary by an electric field.
physics results from this method are reported, based on a small 2.3 l test chamber filled with natural argon and an accumulated fiducial exposure of about 100 kg day, supporting the future validity of this method with isotopically purified 40Ar and for a much larger unit presently under construction with correspondingly increased sensitivities.
Keywords
Dark matter , Liquid argon , WIMP
Journal title
Astroparticle Physics
Serial Year
2008
Journal title
Astroparticle Physics
Record number
1329483
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