Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects

Simple item page
dc.creatorPadmanabhan, Nikhil
dc.creatorFinkbeiner, Douglas P.
dc.date2005-03-23
dc.date.accessioned2026-07-07T11:57:09Z
dc.date.available2026-07-07T11:57:09Z
dc.descriptionDark matter (DM) annihilation during hydrogen recombination (z ~ 1000) will alter the recombination history of the Universe, and affect the observed CMB temperature and polarization fluctuations. Unlike other astrophysical probes of DM, this is free of the significant uncertainties in modelling galactic physics, and provides a method to detect and constrain the cosmological abundances of these particles. We parametrize the effect of DM annihilation as an injection of ionizing energy at a rate e_{dm}, and argue that this simple "on the spot'' modification is a good approximation to the complicated interaction of the annihilation products with the photon-electron plasma. Generic models of DM do not change the redshift of recombination, but change the residual ionization after recombination. This broadens the surface of last scattering, suppressing the temperature fluctuations and enhancing the polarization fluctuations. We use the temperature and polarization angular power spectra to measure these deviations from the standard recombination history, and therefore, indirectly probe DM annihilation. (abridged)
dc.description13 pages, 8 figures, submitted to PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0503486
dc.identifierhttp://arxiv.org/abs/astro-ph/0503486
dc.identifierPhys.Rev.D72:023508,2005
dc.identifierdoi:10.1103/PhysRevD.72.023508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205785
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleDetecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects
dc.typetext

Files

Collections

arXiv