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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/116980
Título: 
Systematic uncertainties from halo asphericity in dark matter searches
Autor(es): 
Instituição: 
  • Universidade Estadual Paulista (UNESP)
  • Univ Los Andes
  • Univ Bonn
  • Univ Valencia
ISSN: 
1475-7516
Financiador: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • FAPA from the Vicerrectoria de Investigaciones at Universidad de los Andes in Bogota, Colombia
  • DFG
  • Helmholtz Alliance for Astroparticle Physics
  • Ramon y Cajal contract
  • Spanish MINECO
  • Portuguese FCT
  • CFTP-FCT Unit 777
  • POCTI (FEDER)
Número do financiamento: 
  • FAPESP: 11/11973-4
  • FAPESP: 13/01792-8
  • DFGTRR33
  • Spanish MINECOFPA2011-23596
  • Portuguese FCTCERN/FP/123580/2011
  • Portuguese FCTPTDC/FIS-NUC/0548/2012
  • CFTP-FCT Unit 777PEst-OE/FIS/UI0777/2013
  • PITN-GA-2011-289442-INVISIBLES
Resumo: 
Although commonly assumed to be spherical, dark matter halos are predicted to be non-spherical by N-body simulations and their asphericity has a potential impact on the systematic uncertainties in dark matter searches. The evaluation of these uncertainties is the main aim of this work, where we study the impact of aspherical dark matter density distributions in Milky-Way-like halos on direct and indirect searches. Using data from the large N-body cosmological simulation Bolshoi, we perform a statistical analysis and quantify the systematic uncertainties on the determination of local dark matter density and the so-called J factors for dark matter annihilations and decays from the galactic center. We find that, due to our ignorance about the extent of the non-sphericity of the Milky Way dark matter halo, systematic uncertainties can be as large as 35%, within the 95% most probable region, for a spherically averaged value for the local density of 0.3-0.4 GeV/cm(3). Similarly, systematic uncertainties on the J factors evaluated around the galactic center can be as large as 10% and 15%, within the 95% most probable region, for dark matter annihilations and decays, respectively.
Data de publicação: 
1-Set-2014
Citação: 
Journal Of Cosmology And Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 9, 30 p., 2014.
Duração: 
30
Publicador: 
Iop Publishing Ltd
Palavras-chaves: 
  • dark matter theory
  • dark matter simulations
Fonte: 
http://dx.doi.org/10.1088/1475-7516/2014/09/004
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/116980
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