The DOI matches its Crossref record; 49 of the 49 references it cites were found in a registry or an index.
Particle decays during the cosmic dark ages
Open accessAbstract
We consider particle decays during the cosmic dark ages with two aims: (1) to explain the high optical depth reported by the Wilkinson Microwave Anisotropy Probe (WMAP), and (2) to provide new constraints to the parameter space for decaying particles. We delineate the decay channels in which most of the decay energy ionizes and heats the intergalactic medium gas [and thus affects the cosmic microwave background (CMB)], and those in which most of the energy is carried away---e.g. photons with energies $100\mathrm{keV}\ensuremath{\lesssim}E\ensuremath{\lesssim}1\mathrm{TeV}$---and thus appears as a contribution to diffuse x-ray and gamma-ray backgrounds. The new constraints to the decay-particle parameters from the CMB power spectrum thus complement those from the cosmic x-ray and \ensuremath{\gamma}-ray backgrounds. Although decaying particles can indeed produce an optical depth consistent with that reported by WMAP, in so doing they produce new fluctuations in the CMB temperature and polarization power spectra. For decay lifetimes less than the age of the Universe, the induced power spectra generally violate current constraints, while the power spectra are usually consistent if the lifetime is longer than the age of the Universe.
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Metadata
- Authors
- Chen, X., & Kamionkowski, M.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2004-08-04
- Volume
- 70
- Issue
- 4
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W2148711716
- Cited by
- 420
- References
- 49
- FWCI
- 4.63
- Type
- journal article
- Language
- en
- Open access
- green
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