Neutrinos are tiny, nearly massless particles that traverse long distances across the universe, interacting with matter only through the weak force. During their journey through the atmosphere and Earth, they can transform, or “oscillate” from one “flavor”—electron, muon, and tau—to another. This phenomenon has led scientists to conclude that neutrinos have nonzero masses, but despite […]
Neutrinos are chargeless, weakly interacting particles that are able to travel undeflected through the cosmos. The IceCube Neutrino Observatory at the South Pole searches for the sources of these astrophysical neutrinos in order to understand the origin of high-energy particles called cosmic rays and, therefore, how the universe works. IceCube has already shown that neutrinos […]
Cosmic rays are extremely energetic charged particles that zoom through space and bombard the Earth’s atmosphere. Since cosmic rays get diverted by magnetic fields on their way to Earth, tracing their origins is more difficult. However, tiny, nearly massless particles called neutrinos, and photons at similar energies, can be used to trace cosmic rays back […]
Since high-energy astrophysical neutrinos were first observed in 2013, the IceCube Neutrino Observatory at the South Pole has continued searching for their elusive sources. So far, evidence of high-energy neutrino emission has been found from the blazar TXS 0506+056, the active galaxy NGC 1068, and most recently, the Milky Way. Still, neutrino emission from these […]
The nature of dark matter—roughly 85% of all matter in the universe—is one of the most important unresolved questions in modern physics. Thus far, no experiment has been able to determine what dark matter is made of. A possible candidate for dark matter are the hypothesized weakly interacting massive particles (WIMPs), which hardly interact with […]