Upper bounds on signals due to WIMP self-annihilation: Comments on the case of the synchrotron radiation from the galactic center and the WMAP haze
- Dipartimento di Fisica Teorica, Universita di Torino, Istituto Nazionale di Fisica Nucleare, Sezione di Torino via P. Giuria 1, I-10125 Torino (Italy)
- Korea Institute for Advanced Study Seoul 130-722 (Korea, Republic of)
Two recent papers reconsider the possibility that the WMAP haze is due to the synchrotron emission originated by neutralino self-annihilation; also upper bounds on the neutralino self-annihilation cross section are suggested. We show that for thermal weakly interacting massive particles (WIMPs) in a standard cosmological model, when the galactic WIMP density is duly rescaled for subdominant WIMPs, the upper bound applicable generically to any signal due to self-conjugate WIMPs is more stringent than the ones obtained from analysis of the WMAP haze. We also argue that an experimental upper bound, which can compete with our generic upper limit, can rather be derived from measurements of cosmic antiproton fluxes. Finally, we comment on the possible impact of our generic upper bound on the interpretation of the WMAP haze in terms of thermal neutralinos in a standard cosmological scheme.
- OSTI ID:
- 21205248
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 12; Other Information: DOI: 10.1103/PhysRevD.77.127301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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