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Positron propagation and fluxes from neutralino annihilation in the halo
Open accessAbstract
Supersymmetric neutralinos are one of the most promising candidates for the dark matter in the Universe. If they exist, they should make up some fraction of the Milky Way halo. We investigate the fluxes of positrons expected at the Earth from neutralino annihilation in the halo. Positron propagation is treated in a diffusion model including energy loss. The positron source function includes contributions from both continuum and monochromatic positrons. We find that, for a ``canonical'' halo model and propagation parameters, the fluxes are generally too low to be visible. Given the large uncertainties in both propagation and halo structure, it is however possible to obtain observable fluxes. We also investigate the shapes of the positron spectra, including fits to a feature indicated by the results of the HEAT experiment.
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Cites
The Structure of Cold Dark Matter Halos
Navarro, J. F., Frenk, C. S., & White, S. D. M. (1996) · The Astrophysical Journal · doi:10.1086/177173 · Cited by 8,544
Big-bang nucleosynthesis enters the precision era
Schramm, D. N., & Turner, M. S. (1998) · Reviews of Modern Physics · doi:10.1103/revmodphys.70.303 · Cited by 353
Cited by
Particle dark matter: evidence, candidates and constraints
Bertone, G., Hooper, D., & Silk, J. (2005) · Physics Reports · doi:10.1016/j.physrep.2004.08.031 · Cited by 4,979
Cosmic-Ray Propagation and Interactions in the Galaxy
Strong, A. W., Moskalenko, I. V., & Ptuskin, V. S. (2007) · Annual Review of Nuclear and Particle Science · doi:10.1146/annurev.nucl.57.090506.123011 · Cited by 1,161
Dark matter and collider phenomenology of universal extra dimensions
Hooper, D., & Profumo, S. (2007) · Physics Reports · doi:10.1016/j.physrep.2007.09.003 · Cited by 358
Metadata
- Authors
- Baltz, E. A., & Edsjö, J.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 1998-12-16
- Volume
- 59
- Issue
- 2
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W2115528245
- Cited by
- 372
- References
- 2
- FWCI
- 4.64
- Type
- journal article
- Language
- en
- Open access
- green
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- Baltz, E. A., & Edsjö, J. (1998). Positron propagation and fluxes from neutralino annihilation in the halo. Physical Review D. https://doi.org/10.1103/physrevd.59.023511
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