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Title: Light W-ino dark matter in brane world cosmology

Abstract

The thermal relic density of W-ino-like neutralino dark matter in brane world cosmology is studied. The expansion law at a high energy regime in brane world cosmology is modified from the one in standard cosmology, and the resultant relic density can be enhanced if the five-dimensional Planck mass M{sub 5} is low enough. We calculate the W-ino-like neutralino relic density in the anomaly mediated supersymmetry breaking scenario and show that the allowed region is dramatically modified from the one in standard cosmology and the W-ino-like neutralino with mass of order 100 GeV can be a good candidate for dark matter. Since the allowed region disappears eventually as M{sub 5} decreases, we can find a lower bound on M{sub 5} > or approx. 100 TeV according to the neutralino dark matter hypothesis, namely, the lower bound in order for the allowed region of neutralino dark matter to exist.

Authors:
; ;  [1];  [2];  [3]
  1. Department of Physics, College of Science and Technology, Nihon University, 1-8-14, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308 (Japan)
  2. (Sokendai), Oho 1-1, Tsukuba, Ibaraki 305-0801 (Japan)
  3. (United Kingdom)
Publication Date:
OSTI Identifier:
20782622
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.73.063518; (c) 2006 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; COSMOLOGY; DENSITY; GEV RANGE; MASS; MEMBRANES; NONLUMINOUS MATTER; PARTICLE IDENTIFICATION; SPARTICLES; SYMMETRY BREAKING; TEV RANGE

Citation Formats

Nihei, Takeshi, Okada, Nobuchika, Seto, Osamu, Theory Division, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan and Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies, and Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ. Light W-ino dark matter in brane world cosmology. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.73.063518.
Nihei, Takeshi, Okada, Nobuchika, Seto, Osamu, Theory Division, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan and Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies, & Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ. Light W-ino dark matter in brane world cosmology. United States. doi:10.1103/PHYSREVD.73.063518.
Nihei, Takeshi, Okada, Nobuchika, Seto, Osamu, Theory Division, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan and Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies, and Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ. Wed . "Light W-ino dark matter in brane world cosmology". United States. doi:10.1103/PHYSREVD.73.063518.
@article{osti_20782622,
title = {Light W-ino dark matter in brane world cosmology},
author = {Nihei, Takeshi and Okada, Nobuchika and Seto, Osamu and Theory Division, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan and Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies and Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ},
abstractNote = {The thermal relic density of W-ino-like neutralino dark matter in brane world cosmology is studied. The expansion law at a high energy regime in brane world cosmology is modified from the one in standard cosmology, and the resultant relic density can be enhanced if the five-dimensional Planck mass M{sub 5} is low enough. We calculate the W-ino-like neutralino relic density in the anomaly mediated supersymmetry breaking scenario and show that the allowed region is dramatically modified from the one in standard cosmology and the W-ino-like neutralino with mass of order 100 GeV can be a good candidate for dark matter. Since the allowed region disappears eventually as M{sub 5} decreases, we can find a lower bound on M{sub 5} > or approx. 100 TeV according to the neutralino dark matter hypothesis, namely, the lower bound in order for the allowed region of neutralino dark matter to exist.},
doi = {10.1103/PHYSREVD.73.063518},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}