2007-01-29 19:49:33 · 4 answers · asked by Yukon Cornelius 2 in Science & Mathematics ➔ Physics
Possibly.
Neutrinos are very weakly interacting particles (they come in matter and antimatter flavours, by the way, like other particles). A neutrino could pass through 35 light years of water before hitting a nucleus, so they are hard to detect.
And though they have been detected, their mass is not known. They are generally assumed massless, but even a very small rest mass could do a lot to account for dark matter because there are so many of them in the universe.
2007-01-29 20:16:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
No, not anymore. It use to a candidate before its rest mass, or even that it had a rest mass, was determined. It does have mass, but not enough to explain dark matter. The axion, which may well have been observed for the first time recently, is probably the best candidate at present.
2007-01-30 14:15:46 · answer #2 · answered by Dr. R 7 · 0⤊ 0⤋
No, the candidates for dark matter are MACHOS (massive compact halo objects) and WIMPS (weakly interactrive massive particles). They constitute about 23% of the universe's content.
2007-01-29 20:05:14 · answer #3 · answered by Mr. X 2 · 0⤊ 0⤋
No, it's a particle of anti-matter
2007-01-29 19:54:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋