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Title: Neutralino Dark Matter: Update on Direct and Indirect Detection

Abstract

Neutralinos represent a viable solution to the Dark Matter problem. In particular, while I discuss here a wide range for their masses, I will deserve a special attention to light neutralinos, which arise in supersymmetric models without unifications conditions of gaugino masses at the GUT scale. They have sizeable direct and indirect detection signals, which are bounded from below by the cosmological constraint on their relic abundance, but are not yet excluded by present direct and indirect searches, including limits coming from the BR(Bs {yields} {mu}+ + {mu}-) decay rate. They represent so an interesting experimental challenge. An intriguing aspect of light neutralinos is also that they could explain the DAMA modulation effect in a still existing compatibility window with other direct search experiments. I also discuss the gamma-ray signal from dark matter annihilation in our Galaxy and give some examples of external objects, namely the Andromeda Galaxy (M31) and M87. Predictions for the fluxes turn out to be below the level required to explain the possible indications of a {gamma}-ray excess shown by EGRET, CANGAROO-II and HESS (toward the Galactic Center) and HEGRA (from M87). As far as future experiments are concerned, only the signal from the galactic centermore » could be accessible to both satellite-borne experiments and to ACTs, even though this requires very steep dark matter density profiles.« less

Authors:
 [1]
  1. Korea Institute for Advanced Study 207-43 Cheongnyangni 2-dong, Dongdaemun-gu Seoul 130-722 (Korea, Republic of)
Publication Date:
OSTI Identifier:
20729206
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 805; Journal Issue: 1; Conference: PASCOS 2005: 11. international symposium on particles, strings, and cosmology, Gyeongju (Korea, Republic of), 30 May - 4 Jun 2005; Other Information: DOI: 10.1063/1.2149745; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABUNDANCE; ANNIHILATION; DENSITY; GAMMA RADIATION; MODULATION; NONLUMINOUS MATTER; PARTICLE DECAY; PARTICLE IDENTIFICATION; QUANTUM FIELD THEORY; REST MASS; SUPERSYMMETRY

Citation Formats

Scopel, S. Neutralino Dark Matter: Update on Direct and Indirect Detection. United States: N. p., 2005. Web. doi:10.1063/1.2149745.
Scopel, S. Neutralino Dark Matter: Update on Direct and Indirect Detection. United States. doi:10.1063/1.2149745.
Scopel, S. Fri . "Neutralino Dark Matter: Update on Direct and Indirect Detection". United States. doi:10.1063/1.2149745.
@article{osti_20729206,
title = {Neutralino Dark Matter: Update on Direct and Indirect Detection},
author = {Scopel, S.},
abstractNote = {Neutralinos represent a viable solution to the Dark Matter problem. In particular, while I discuss here a wide range for their masses, I will deserve a special attention to light neutralinos, which arise in supersymmetric models without unifications conditions of gaugino masses at the GUT scale. They have sizeable direct and indirect detection signals, which are bounded from below by the cosmological constraint on their relic abundance, but are not yet excluded by present direct and indirect searches, including limits coming from the BR(Bs {yields} {mu}+ + {mu}-) decay rate. They represent so an interesting experimental challenge. An intriguing aspect of light neutralinos is also that they could explain the DAMA modulation effect in a still existing compatibility window with other direct search experiments. I also discuss the gamma-ray signal from dark matter annihilation in our Galaxy and give some examples of external objects, namely the Andromeda Galaxy (M31) and M87. Predictions for the fluxes turn out to be below the level required to explain the possible indications of a {gamma}-ray excess shown by EGRET, CANGAROO-II and HESS (toward the Galactic Center) and HEGRA (from M87). As far as future experiments are concerned, only the signal from the galactic center could be accessible to both satellite-borne experiments and to ACTs, even though this requires very steep dark matter density profiles.},
doi = {10.1063/1.2149745},
journal = {AIP Conference Proceedings},
number = 1,
volume = 805,
place = {United States},
year = {Fri Dec 02 00:00:00 EST 2005},
month = {Fri Dec 02 00:00:00 EST 2005}
}