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Title: Direct WIMP detection in directional experiments

Abstract

The recent WMAP data have confirmed that exotic dark matter together with the vacuum energy (cosmological constant) dominate in the flat Universe. Thus the direct dark matter search, consisting of detecting the recoiling nucleus, is central to particle physics and cosmology. Modern particle theories naturally provide viable cold dark matter candidates with masses in the GeV-TeV region. Supersymmetry provides the lightest supersymmetric particle (LSP), theories in extra dimensions the lightest Kaluza-Klein particle (LKP) etc. Unfortunately, however, in nuclear recoil measurements the interesting signal cannot be easily distinguished from the background. So, to minimize the background problems, one should exploit characteristic signatures of the reaction, such as the modulation effect and, in directional experiments, the correlation of the event rates with the sun's motion. In standard nondirectional experiments the modulation is small, less than two per cent and the location of the maximum depends on the unknown particle's mass. In directional experiments, in addition to the forward-backward asymmetry due to the sun's motion, one expects a larger modulation, which depends on the direction of observation. We study such effects both in the case of a light and a heavy target. Furthermore, since it now appears that the planned experiments may bemore » only partly directional, in the sense that they can only detect the line of the recoiling nucleus, but not the sense of direction on it, we study which of the above mentioned interesting features, if any, will persist in these less ambitious experiments.« less

Authors:
 [1];  [2];  [3]
  1. Theoretical Physics Division, University of Ioannina, Ioannina, Gr 451 10 (Greece)
  2. (Germany)
  3. Institute of Theoretical Physics, University of Tuebingen, Tuebingen (Germany)
Publication Date:
OSTI Identifier:
21020092
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.055007; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CORRELATIONS; COSMOLOGICAL CONSTANT; COSMOLOGY; GEV RANGE; KALUZA-KLEIN THEORY; MODULATION; NONLUMINOUS MATTER; PARTICLE IDENTIFICATION; SPARTICLES; SUPERSYMMETRY; TEV RANGE; UNIVERSE

Citation Formats

Vergados, J. D., Institute of Theoretical Physics, University of Tuebingen, Tuebingen, and Faessler, Amand. Direct WIMP detection in directional experiments. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.055007.
Vergados, J. D., Institute of Theoretical Physics, University of Tuebingen, Tuebingen, & Faessler, Amand. Direct WIMP detection in directional experiments. United States. doi:10.1103/PHYSREVD.75.055007.
Vergados, J. D., Institute of Theoretical Physics, University of Tuebingen, Tuebingen, and Faessler, Amand. Thu . "Direct WIMP detection in directional experiments". United States. doi:10.1103/PHYSREVD.75.055007.
@article{osti_21020092,
title = {Direct WIMP detection in directional experiments},
author = {Vergados, J. D. and Institute of Theoretical Physics, University of Tuebingen, Tuebingen and Faessler, Amand},
abstractNote = {The recent WMAP data have confirmed that exotic dark matter together with the vacuum energy (cosmological constant) dominate in the flat Universe. Thus the direct dark matter search, consisting of detecting the recoiling nucleus, is central to particle physics and cosmology. Modern particle theories naturally provide viable cold dark matter candidates with masses in the GeV-TeV region. Supersymmetry provides the lightest supersymmetric particle (LSP), theories in extra dimensions the lightest Kaluza-Klein particle (LKP) etc. Unfortunately, however, in nuclear recoil measurements the interesting signal cannot be easily distinguished from the background. So, to minimize the background problems, one should exploit characteristic signatures of the reaction, such as the modulation effect and, in directional experiments, the correlation of the event rates with the sun's motion. In standard nondirectional experiments the modulation is small, less than two per cent and the location of the maximum depends on the unknown particle's mass. In directional experiments, in addition to the forward-backward asymmetry due to the sun's motion, one expects a larger modulation, which depends on the direction of observation. We study such effects both in the case of a light and a heavy target. Furthermore, since it now appears that the planned experiments may be only partly directional, in the sense that they can only detect the line of the recoiling nucleus, but not the sense of direction on it, we study which of the above mentioned interesting features, if any, will persist in these less ambitious experiments.},
doi = {10.1103/PHYSREVD.75.055007},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}