Published December 15, 1992
| Version v1
Journal article
Nonequilibrium effect of the neutrino distribution on primordial helium synthesis
Creators
- 1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606 (Japan)
- 2. Center for Particle Astrophysics, University of California, Berkeley, California 94720 (United States)
- 3. Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
Description
We study the effect of the deviation of the electron-neutrino spectrum from the thermal equilibirum distribution, originating from residual interactions between neutrinos and electrons which have different temperatures after decoupling. It is found that this effect causes an appreciable spectral distortion of the order of 1% or more in the higher-energy side of the distribution, when the temperature drops below 1 MeV. The resulting modification in the helium abundance, however, is small, and only of the order of ΔY∼1.3x10-4
Additional details
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 46
- Journal Issue
- 12
- Journal Page Range
- p. 5378-5382.
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24028141
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ABUNDANCE; FERMI STATISTICS; HELIUM; NEUTRINO-ELECTRON INTERACTIONS; NEUTRONS; NUCLEOSYNTHESIS; PHASE SPACE; PHASE TRANSFORMATIONS; PROTONS; STANDARD MODEL; THERMAL EQUILIBRIUM; UNIVERSE
- Descriptors DEC
- BARYONS; CATIONS; CHARGED PARTICLES; ELEMENTARY PARTICLES; ELEMENTS; EQUILIBRIUM; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INTERACTIONS; IONS; LEPTON-LEPTON INTERACTIONS; MATHEMATICAL MODELS; MATHEMATICAL SPACE; NONMETALS; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE MODELS; QUANTUM FIELD THEORY; RARE GASES; SPACE; SYNTHESIS; UNIFIED GAUGE MODELS