Reconciling Cold Dark Matter with COBE/IRAS Plus Solar and Atmospheric Neutrino Data

Abstract

We present a model where an unstable MeV Majorana tau \neu can naturally reconcile the cold dark matter model (CDM) with cosmological observations of large and small scale density fluctuations and, simultaneously, with data on solar and atmospheric neutrinos. The solar \neu deficit is explained through long wavelength, so-called {\sl just-so} oscillations involving conversions of \ne into both \nm and a sterile species \ns, while atmospheric \neu data are explained through \nm to \ne conversions. Future long baseline \neu oscillation experiments, as well as some reactor experiments will test this hypothesis. The model is based on the spontaneous violation of a global lepton number symmetry at the weak scale. This symmetry plays a key role in generating the cosmologically required decay of the \nt with lifetime ${\tau }_{{\nu }_{\tau }}\sim 10^2-10^4$ seconds, as well as the masses and oscillations of the three light \neus \ne, \nm and \ns required in order to account for solar and atmospheric \neu data. It also leads to the invisibly decaying higgs signature that can be searched at LEP and future particle colliders.

latex. This version includes the figure as a compressed fig.uu file, appended at the end. Moreover it adds a reference to the work of Chun, Kim and Kim

References in corpus (15)

• Reconciling Dark Matter, Solar and Atmospheric Neutrinos
• Signatures of an invisibly decaying Higgs particles at LHC
• Is Large Lepton Mixing Excluded?
• SO(10) grand unification model for degenerate neutrino masses
• The ${}^7$Be Solar Neutrino Line: A Reflection of the Central Temperature Distribution of the Sun
• Detecting an Invisibly Decaying Higgs Boson at a Hadron Supercollider
• Long-Wavelength Oscillations and the Gallex Solar Neutrino Signal
• New Higgs Signatures in Supersymmetry with Spontraneously Broken R Parity"
• Is a Massive Tau Neutrino Just What Cold Dark Matter Needs?
• Naturally Degenerate Neutrinos
• Planck scale effects in neutrino physics
• Model Independent Higgs Boson Mass Limits at LEP
• Searching for an Invisibly Decaying Higgs Boson in E^+E^-, E-Gamma, and Gamma-Gamma Collisions
• Mass Limits of Invisibly Decaying Higgs Particles from the LEP Data
• Detection of Intermediate Mass Higgs Bosons from Spontaneously Broken R Parity Supersymmetry

Cited by in corpus (15)

• Supernova Bounds on Majoron-emitting decays of light neutrinos
• The effect of random matter density perturbations on the MSW solution to the solar neutrino problem
• Primordial Nucleosynthesis, Majorons and Heavy Tau Neutrinos
• Unification of gauge couplings and the tau neutrino mass in Supergravity without R-parity
• An improved cosmological bound on the tau-neutrino mass
• Radiative neutrino decays in very strong magnetic fields
• Neutrino Properties
• Neutrinos in Cosmology
• Neutrino Physics at the Turn of the Millenium
• Neutrinos Properties Beyond the Standard Model
• Invisible Matter
• Dark matter in the universe
• Recent Results on Neutrino Masses
• Mass of tau neutrino in SO(10) GUT-s
• Neutrinos and Physics Beyond the Standard Model