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Trouble For Dark Energy Hypothesis?
In article , jacobnavia
writes: Le 23/01/2018 22:33, Steve Willner a écrit : In article , Gary Harnagel writes: The neutrino flux would be red-shifted by z ~ 1100 also, This ignores the part about the neutrinos having decoupled long before the photons. One source, which seems to be a textbook by Daniel Baumann at Cambridge: http://www.damtp.cam.ac.uk/user/db27...y/Chapter3.pdf gives a neutrino decoupling redshift of 6E9. That corresponds to an energy of about 1 Mev and a time about 1 s after the Big Bang. Cosmological neutrinos should therefore have a kinetic energy today of about 1/6 meV (i.e., milli-, not mega-). As the OP wrote, that's very far from detectable. It depends on your antena's neutrino sensitivity. I'm no expert here, but the energy of neutrinos in the cosmic neutrino background have energies orders of magnitude below that needed for the reactions used in conventional detectors. Why do neutrinos react with some Chlorate compounds? Isn't it a consequence of the geometry of the collision? I'm not sure what you mean here, but even if it were, the energies are too low. I'm sure some expert will weigh in on the "direction" stuff. |
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