Solar System constraints and signatures for dark-matter candidates
We show that if our galactic halo were to consist of scalar or Dirac neutrinos with mass greater than approx.12 GeV, capture by the Earth and subsequent annihilation would yield a large flux of neutrinos at the surface which could be seen in proton-decay detectors. The luminosity of Uranus provides comparable constraints. Capture in the Sun can yield supplementary information, with detectable signals possible for masses as low as 6 GeV for both Dirac and Majorana neutrinos, scalar neutrinos, and photinos. We discuss in detail the question of evaporation, on which our results and others depend sensitively. We suggest one method of approximating evaporation rates from the Earth and Sun and discuss potential problems with earlier estimates. Finally, we describe how particles which avoid these constraints may still be detectable by bolometric neutrino detectors and isolate a new method to remove backgrounds to this signal in such detectors.
- Research Organization:
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138
- OSTI ID:
- 5976465
- Journal Information:
- Phys. Rev. D; (United States), Vol. 33:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GALAXIES
NEUTRINOS
SOLAR NEUTRINOS
ANNIHILATION
MASS
CROSS SECTIONS
DECAY
DIRAC EQUATION
ELASTIC SCATTERING
EVAPORATION MODEL
MONTE CARLO METHOD
PROTONS
WEAK INTERACTIONS
BARYONS
BASIC INTERACTIONS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
HADRONS
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEONS
PARTIAL DIFFERENTIAL EQUATIONS
RADIATIONS
SCATTERING
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
WAVE EQUATIONS
640101* - Astrophysics & Cosmology- Cosmic Radiation
645203 - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties