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Journal ArticleDOI

Limits on New Superweakly Interacting Particles from Primordial Nucleosynthesis

TLDR
In this paper, it was shown that the maximum number of superweakly interacting, light (< 1 MeV) particles is between ∼1 and ∼20, depending on the strength of their interaction.
About
This article is published in Nuclear Physics.The article was published on 1981-05-25. It has received 106 citations till now. The article focuses on the topics: Big Bang nucleosynthesis & Massless particle.

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Review of Particle Physics

Claude Amsler, +176 more
- 01 Jul 1996 - 
TL;DR: This biennial Review summarizes much of particle physics, using data from previous editions.
Journal ArticleDOI

Cosmic abundances of stable particles: Improved analysis

TL;DR: An exact relativistic single-integral formula for the thermal average of the annihilation cross section times velocity, the key quantity in the determination of the cosmic relic abundance of a species, is obtained in this paper.
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micrOMEGAs_3: A program for calculating dark matter observables

TL;DR: This new version of micrOMEGAs is a major update which includes a generalization of the Boltzmann equations to accommodate models with asymmetric dark matter or with semi-annihilation and a first approach to a generalizations of the thermodynamics of the Universe in the relic density computation.
Journal ArticleDOI

micrOMEGAs : A program for calculating the relic density in the MSSM

TL;DR: In this article, a code that calculates the relic density of the lightest supersymmetric particle (LSP) in the minimal supersymmymmetric standard model is presented, where all tree level processes for the annihilation of the LSP are included as well as all possible coannihilation processes with neutralinos, charginos, sleptons, squarks and gluinos.
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Superdense Matter: Neutrons Or Asymptotically Free Quarks?

TL;DR: The quark model implies that superdense matter (found in neutron star cores, exploding black holes, and the early big-bang universe) consists of quarks rather than of hadrons as discussed by the authors.
Journal ArticleDOI

Cosmological Limits to the Number of Massive Leptons

TL;DR: In this article, it was shown that observational limits to the primordial abundance of 4He lead to the constraint that the total number of types of heavy lepton must be less than or equal to 5.
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