Critical revision of the ZEPLIN-I sensitivity to WIMP interactions

A Benoit,G Gerbier,C Goldbach,G Chardin,W Seidel,G Nollez,M Chapellier,F Pröbst,L Dumoulin,K Eitel,J Jochum,J Gascon,A De Lesquen

doi:10.1016/j.physletb.2006.04.030

Critical revision of the ZEPLIN-I sensitivity to WIMP interactions

A Benoit, G Gerbier + Show 11 more

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https://doi.org/10.1016/j.physletb.2006.04.030

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Journal: Physics Letters B	Publication Date: Apr 25, 2006
Citations: 7

Affiliation: Direction des énergies, CEA Saclay, Atomic Energy and Alternative Energies Commission, University of Tübingen, Max Planck Institute for Physics, Institute of Nuclear Physics of Lyon, Institut National de Physique Nucléaire et de Physique des Particules, Claude Bernard University Lyon 1, French National Centre for Scientific Research, Institut d'Astrophysique de Paris

#Electron Recoil #Discrimination Method + Show 8 more

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Abstract

Abstract The ZEPLIN Collaboration has recently published its first result presenting a maximum sensitivity of 1.1 × 10 −6 picobarn for a WIMP mass of ≈ 60 GeV . The analysis is based on a discrimination method using the different time distribution of scintillation light generated in electron recoil and nuclear recoil interactions. We show that the methodology followed both for the calibration of the ZEPLIN-I detector response and for the estimation of the discrimination power is not reliable enough to claim any background discrimination at the present stage. The ZEPLIN-I sensitivity appears then to be in the order of 10−3 picobarn, three orders of magnitude above the claimed 1.1 × 10 −6 picobarn.

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