Cold dark matter Dark matter

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cold dark matter offers simplest explanation cosmological observations. dark matter composed of constituents fsl smaller protogalaxy. focus dark matter research, hot dark matter not seem capable of supporting galaxy or galaxy cluster formation, , particle candidates slowed early.


the constituents of cold dark matter unknown. possibilities range large objects machos (such black holes) or rambos (such clusters of brown dwarfs), new particles such wimps , axions.


studies of big bang nucleosynthesis , gravitational lensing convinced cosmologists machos cannot make more small fraction of dark matter. according a. peter: ... plausible dark-matter candidates new particles.


the 1997 dama/nai experiment , successor dama/libra in 2013, claimed directly detect dark matter particles passing through earth, many researchers remain skeptical, negative results similar experiments seem incompatible dama results.


many supersymmetric models offer dark matter candidates in form of wimpy lightest supersymmetric particle (lsp). separately, heavy sterile neutrinos exist in non-supersymmetric extensions standard model explain small neutrino mass through seesaw mechanism.








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