Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection
Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2015-09-28Citation
10.1103/PhysRevD.92.065029
Physical Review D 92.6 (2015): 065029
ISSN
1550-7998 (print); 1550-2368 (online)DOI
10.1103/PhysRevD.92.065029Funded by
The work was supported partly by The Netherlands Organisation for Scientific Research (NWO) through Vidi grant (S. A.), by University of Amsterdam (R. D. and S. A.) and by Fundação de Amparo à Pesquisa do Estado de São Paulo (M. E. C. C.)Editor's Version
http://dx.doi.org/10.1103/PhysRevD.92.065029Subjects
FísicaRights
© 2015 American Physical SocietyAbstract
We study how the kinetic decoupling of dark matter within a minimal supersymmetric extension of the standard model, by adopting nine independent parameters (MSSM-9), could improve our knowledge of the properties of the dark matter protohalos. We show that the most probable neutralino mass regions, which satisfy the relic density and the Higgs mass constraints, are those with the lightest supersymmetric neutralino mass around 1 TeV and 3 TeV, corresponding to Higgsino-like and winolike neutralino, respectively. The kinetic decoupling temperature in the MSSM-9 scenario leads to a most probable protohalo mass in a range of Mph∼10-12-10-7M. The part of the region closer to ∼2TeV gives also important contributions from the neutralino-stau coannihilation, reducing the effective annihilation rate in the early Universe. We also study how the size of the smallest dark matter substructures correlates to experimental signatures, such as the spin-dependent and spin-independent scattering cross sections, relevant for direct detection of dark matter. Improvements on the spin-independent sensitivity might reduce the most probable range of the protohalo mass between ∼10-9M and ∼10-7M, while the expected spin-dependent sensitivity provides weaker constraints. We show how the boost of the luminosity due to dark matter annihilation increases, depending on the protohalo mass. In the Higgsino case, the protohalo mass is lower than the canonical value often used in the literature (∼10-6M), while (σv) does not deviate from (σv)∼10-26 cm3 s-1; there is no significant enhancement of the luminosity. On the contrary, in the wino case, the protohalo mass is even lighter, and (σv) is two orders of magnitude larger; as its consequence, we see a substantial enhancement of the luminosity
Files in this item
Google Scholar:Diamanti, R.
-
Catalan, M.E.C.
-
Ando, S.
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.
-
Fits to the Fermi-LAT GeV excess with right-handed sneutrino dark matter: Implications for direct and indirect dark matter searches and the LHC
Cerdeño, D. G.; Peiró, M.; Robles, S.
2015-06-22 -
Nuclear uncertainties in the spin-dependent structure functions for direct dark matter detection
Cerdeño, D. G.; Fornasa, Mattia; Huh, J. H.; Peiró, M.
2013-01-18