Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Implications for constrained supersymmetry of combined HESS observations of dwarf galaxies, the Galactic halo and the Galactic Centre
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
2011 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 11, 4- p.Article in journal (Refereed) Published
Abstract [en]

In order to place limits on dark matter (DM) properties using gamma-ray observations, previous analyses have often assumed a very simple parametrisation of the gamma-ray annihilation yield; typically, it has been assumed that annihilation proceeds through a single channel only. In realistic DM models, annihilation may occur into many different final states, making this quite a rough ansatz. With additional processes like virtual internal bremsstrahlung and final state radiation, this ansatz becomes even more incorrect, and the need for scans of explicit model parameter spaces becomes clear. Here we present scans of the parameter space of the Constrained Minimal Supersymmetric Standard Model (CMSSM), considering gamma-ray spectra from three dwarf galaxies, the Galactic Centre region and the broader Galactic halo, as obtained with the High-Energy Stereoscopic System (H.E.S.S.). We present a series of likelihood scans combining the H.E.S.S. data with other experimental results. We show that including combined observations of the Sagittarius. Carina and Sculptor dwarf galaxies strongly disfavour the coannihilation region of the CMSSM and models with large annihilation cross-sections. Without the Sagittarius dwarf, which admittedly has a rather uncertain dark matter profile, the results are similar, but weaker. The Galactic Centre search is complicated by a strong (unknown) gamma-ray source, and we see no significant effect on the CMSSM parameter space when assuming a realistic Galactic Centre DM density profile.

Place, publisher, year, edition, pages
2011. no 11, 4- p.
Keyword [en]
supersymmetry and cosmology, dark matter theory, gamma ray experiments, dwarfs galaxies
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-74047DOI: 10.1088/1475-7516/2011/11/004ISI: 000298141300004OAI: oai:DiVA.org:su-74047DiVA: diva2:506679
Note
authorCount :3Available from: 2012-02-29 Created: 2012-02-28 Last updated: 2017-12-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Ripken, JoachimConrad, Jan
By organisation
Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Journal of Cosmology and Astroparticle Physics
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 20 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf