skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Cold + hot dark matter cosmology with [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2. 4 eV

Abstract

Cold + hot dark matter (CHDM) [Omega]=1 cosmological models require a total neutrino mass [similar to]5 eV. Because recent data support the [nu][sub [mu]][r arrow][nu][sub [tau]] oscillation explanation of the cosmic ray [nu][sub [mu]] deficit, which requires that [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]]), this suggests that [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2.4 eV. The linear calculations and [ital N]-body simulation reported here indicate that an [Omega]=1 CHDM model with two 2.4 eV neutrinos (designated C[nu][sup 2]DM) agrees remarkably well with all available observations, but only if the Hubble parameter [ital h][approx]0.5. We also show that even one 2.4 eV neutrino raises serious difficulties for low-[Omega] flat CDM models.

Authors:
 [1];  [2];  [3];  [4]
  1. (Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California 95064 (United States))
  2. (Lowell Observatory, Mars Hill Road, Flagstaff, Arizona 86100 (United States))
  3. (Department of Astronomy, New Mexico State University, Las Cruces, New Mexico 88001 (United States))
  4. (Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States))
Publication Date:
OSTI Identifier:
6403818
Alternate Identifier(s):
OSTI ID: 6403818
Resource Type:
Journal Article
Journal Name:
Physical Review Letters; (United States)
Additional Journal Information:
Journal Volume: 74:12; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL MODELS; NEUTRINOS; MASS; COSMIC RADIATION; NEUTRINO OSCILLATION; SIMULATION; ELEMENTARY PARTICLES; FERMIONS; IONIZING RADIATIONS; LEPTONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; RADIATIONS 662430* -- Properties of Leptons-- (1992-); 662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)

Citation Formats

Primack, J.R., Holtzman, J., Klypin, A., and Caldwell, D.O. Cold + hot dark matter cosmology with [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2. 4 eV. United States: N. p., 1995. Web. doi:10.1103/PhysRevLett.74.2160.
Primack, J.R., Holtzman, J., Klypin, A., & Caldwell, D.O. Cold + hot dark matter cosmology with [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2. 4 eV. United States. doi:10.1103/PhysRevLett.74.2160.
Primack, J.R., Holtzman, J., Klypin, A., and Caldwell, D.O. Mon . "Cold + hot dark matter cosmology with [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2. 4 eV". United States. doi:10.1103/PhysRevLett.74.2160.
@article{osti_6403818,
title = {Cold + hot dark matter cosmology with [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2. 4 eV},
author = {Primack, J.R. and Holtzman, J. and Klypin, A. and Caldwell, D.O.},
abstractNote = {Cold + hot dark matter (CHDM) [Omega]=1 cosmological models require a total neutrino mass [similar to]5 eV. Because recent data support the [nu][sub [mu]][r arrow][nu][sub [tau]] oscillation explanation of the cosmic ray [nu][sub [mu]] deficit, which requires that [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]]), this suggests that [ital m]([nu][sub [mu]])[approx][ital m]([nu][sub [tau]])[approx]2.4 eV. The linear calculations and [ital N]-body simulation reported here indicate that an [Omega]=1 CHDM model with two 2.4 eV neutrinos (designated C[nu][sup 2]DM) agrees remarkably well with all available observations, but only if the Hubble parameter [ital h][approx]0.5. We also show that even one 2.4 eV neutrino raises serious difficulties for low-[Omega] flat CDM models.},
doi = {10.1103/PhysRevLett.74.2160},
journal = {Physical Review Letters; (United States)},
issn = {0031-9007},
number = ,
volume = 74:12,
place = {United States},
year = {1995},
month = {3}
}