> Three times since 2016, ultra-high-energy particles have blasted up through the ice of Antarctica, setting off detectors in the Antarctic Impulsive Transient Antenna (ANITA) experiment, along with several additional particles detected later at the buried Antarctic neutrino observatory IceCube. The particles look like ultra high-energy neutrinos. But ultra high-energy neutrinos shouldn’t be able to pass through the Earth.
“Pass through the Earth” is misleading. It’s not that matter of Earth that is the problem, it’s the matter of intergalactic space.
> A collection of hyperactive neutrino guns somewhere in our northern sky could have blasted enough neutrinos into Earth that we’d detect particles shooting out of the southern tip of our planet.
It’s aliens.
> ultra-high-energy cosmic neutrinos come from the interactions of cosmic rays with the cosmic microwave background (CMB), the faint afterglow of the Big Bang. Every once in a while, those cosmic rays interact with the CMB in just the right way to fire high-energy particles at Earth.
Yep. Is science reporting on the web getting better?
> If the events detected by ANITA belong to this diffuse neutrino component, ANITA should have measured many other events at other elevation angles. if the upward-flying particles were cosmic-accelerator-boosted neutrinos from the Standard Model — most likely tau neutrinos — then the beam should have come with a shower of lower-energy particles that would have tripped IceCube’s lower-energy detectors.
Didn’t know that. Interesting.
> in 2018, IceCube tracked a high-energy neutrino back to a blazar, an intense jet of particles coming from an active black hole at the center of a distant galaxy.
Yippee. It’s all explained. Or not.
> https://arxiv.org/pdf/2001.01737.pdf
Some other time. It’s a bit like trying to determine the statistics of a probability distribution from six random points. Insufficient data.
transition said:
nothing shall go defiantly undiscovered, let there be no secrecy about the universe, it will yield to the democracy of curiosities, and dare not go unexplained
Except for the interstellar medium, ball lightning and dark matter.