Limits on cold dark matter from the Gotthard Ge experiment

Reusser, D.; Treichel, M.; Boehm, F.; Broggini, C.; Fisher, P. H.; Fluri, L.; Gabathuler, K.; Henrikson, H.; Jörgens, V.; Mitchell, L.W.; Nussbaum, C.; Vuilleumier, J. L.

doi:10.1016/0370-2693(91)91155-o

Cited by 143 publications

(42 citation statements)

References 8 publications

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“…limit of the HDMS prototype with 9.9 kg d exposure. Solid thin line: limit of the Heidelberg-Moscow experiment [7], light dashed line: Ge limit from Neuchâtel [18], dashed-dotted line: DAMA limit [19], dotted line: CDMS 2000 limit [20]. The dark dashed curve is the expectation for HDMS with a background index of 0.07 events/kg d keV in the 2-30 keV energy region.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…This is mainly due to the lower energy threshold of 2 keV, compared to 9 keV in the Heidelberg-Moscow experiment. Also shown in the figure are limits from the Heidelberg-Moscow experiment [7], the Neuchâtel-experiment [18], the DAMA experiment [19] and the most recent limits from the CDMS experiment [20]. The filled contour represents the 2σ evidence region of the DAMA experiment [23].…”

Section: Dark Matter Limitsmentioning

confidence: 99%

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First results from the Heidelberg dark matter search experiment

et al. 2000

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The Heidelberg Dark Matter Search Experiment (HDMS) is a new ionization Germanium experiment in a special design. Two concentric Ge crystals are housed by one cryostat system, the outer detector acting as an effective shield against multiple scattered photons for the inner crystal, which is the actual dark matter target. We present first results after successfully running the prototype detector for a period of about 15 months in the Gran Sasso Underground Laboratory. We analyze the results in terms of limits on WIMP-nucleon cross sections and present the status of the full scale experiment, which will be installed in Gran Sasso in the course of this year.

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Section: Acknowledgmentsmentioning

confidence: 99%

Section: Dark Matter Limitsmentioning

confidence: 99%

First results from the Heidelberg dark matter search experiment

et al. 2000

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“…The thick dashed line shows the one from the previous running of the same detector [2] for comparison. Limits from a recent result of IGEX-DM experiment [10] (thin-dashed), from the Heidelberg-Moscow experiment [14] (dot-dashed) and from a combination of previous germanium experiments [2,12,13] (dots) are also shown. The closed region corresponds to the (3σ) annual modulation effect reported by the DAMA collaboration (including NaI-1,2,3,4 runnings) [15].…”

Section: Limit On Axion-photon Couplingmentioning

confidence: 99%

Particle dark matter and solar axion searches with a small germanium detector at the Canfranc Underground Laboratory

Morales

Avignone

Brodzinski

et al. 2002

Astroparticle Physics

102

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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 [1,2]. 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 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 axionphoton coupling obtained from the analysis of the data looking for a Primakoff axion-to-photon conversion and Bragg scattering inside the crystal. PACS: 95.35+d; 14.80.Mz

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“…A stable neutrino species with mass of the order of 100 GeV and asymmetry of the order of the baryon asymmetry could provide closure density. [Neither the precision measurements of the width of the ZO boson nor nucleosynthesis precludes such a fourth neutrino species; dark-matter searches employing ionization detectors do unless the mass exceeds a teraelectronvolt or so (79)(80)(81)(82)]. …”

Section: Dark-matter Relics: Originsmentioning

confidence: 99%

Dark matter: theoretical perspectives.

Turner

1993

Proc. Natl. Acad. Sci. U.S.A.

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I both review and make the case for the current theoretical prejudice: a flat Universe whose dominant constituent is nonbaryonic dark matter, emphasizing that this is still a prejudice and not yetfact. The theoretical motivation for nonbaryonic dark matter is discussed in the context of current elementary-particle theory, stressing that (i) there are no dark-matter candidates within the "standard model" of particle physics, (ii) there are several compelling candidates within attractive extensions of the standard model of particle physics, and (ii) the motivation for these compelling candidates comes first and foremost from particle physics. The dark-matter problem is now a pressing issue in both cosmology and particle physics, and the detection of particle dark matter would provide evidence for "new physics." The compelling candidates are a very light axion (10-6-10-4 eV), a light neutrino (20-90 eV), and a heavy neutralino (10 GeV-2 TeV). The production of these particles in the early Universe and the prospects for their detection are also discussed. I briefly mention more exotic possibilities for the dark matter, including a nonzero cosmological constant, superheavy magnetic monopoles, and decaying neutrinos. OverviewOne of the simplest yet most fundamental questions we can ask in cosmology concerns the quantity and composition of the matter in the Universe: What is mass density, QO, expressed as a fraction of the critical density, and what are the contributions of the various constituents-e.g., baryons, photons, and whatever else? [The critical density PCRIT = 3H0/8irG = 1.88h2 x 10-29 g-cm3 = 1.05 x 104 eV-cm3, where Ho = 100h km sec-1 Mpc-1; 1 eV = 1.602 x 10-19 J; 1 megaparsec (Mpc) = 3.09 x 1022 m.] The answer to this question bears upon almost every topic discussed at this colloquium: the expansion age and fate of the Universe; the origin of structure in the Universe and cosmic background radiation (CBR) anisotropies; galactic disks, rotation curves, and morphology; cluster dynamics; gravitational lensing; and the distribution of light and mass. The only thing we know with great precision is the contribution of photons, nZ = 2.49h-2 X 10-4 (assuming Tyo = 2.73 K), and neutrinos, Ql, = 1.70h-2 X 10-4 (assuming all three species are massless); and based on primordial nucleosynthesis, we know the contribution of baryons to within a factor of two, nBh2 = 0.01-0.02 (see, e.g., refs.

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Limits on cold dark matter from the Gotthard Ge experiment

Cited by 143 publications

References 8 publications

First results from the Heidelberg dark matter search experiment

First results from the Heidelberg dark matter search experiment

Particle dark matter and solar axion searches with a small germanium detector at the Canfranc Underground Laboratory

Dark matter: theoretical perspectives.

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