Constraints on neutrino-dark matter interactions from cosmic microwave background and large scale structure data

Paolo Serra, Federico Zalamea, Asantha Cooray, Gianpiero Mangano, and Alessandro Melchiorri
Phys. Rev. D 81, 043507 – Published 2 February 2010

Abstract

We update a previous investigation of cosmological effects of a nonstandard interaction between neutrinos and dark matter. Parametrizing the elastic-scattering cross section between the two species as a function of the temperature of the Universe, the resulting neutrino-dark matter fluid has a nonzero pressure, which determines diffusion-damped oscillations in the matter power spectrum similar to the acoustic oscillations generated by the photon-baryon fluid. Using cosmic microwave background data in combination with large scale structure experiment results, we then put constraints on the fraction of the interacting dark matter component as well as on the corresponding opacity.

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  • Received 1 December 2009

DOI:https://doi.org/10.1103/PhysRevD.81.043507

©2010 American Physical Society

Authors & Affiliations

Paolo Serra1, Federico Zalamea1,2, Asantha Cooray1, Gianpiero Mangano3, and Alessandro Melchiorri4

  • 1Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
  • 2Paris Diderot Physics Department, 10, rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13
  • 3Istituto Nazionale di Fisica Nucleare-Sezione di Napoli, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, Italy
  • 4Physics Department and INFN, University of Rome “La Sapienza”, P.le Aldo Moro 2, 00185 Rome, Italy

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Vol. 81, Iss. 4 — 15 February 2010

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