How Neutrinos Test the Constancy of the Laws of Physics ⚡ экспресс
Scientists simulated the flux of cosmogenic neutrinos (born from cosmic rays) and calculated how their oscillations (transformations from one type to another) would be affected by a violation of Lorentz invariance — the principle that the laws of physics are the same for all observers. It turns out that future facilities GRAND and POEMMA, designed to detect ultra-high-energy tau neutrinos, can spot effects that are orders of magnitude more sensitive than current limits. It’s like checking a road’s smoothness in a Formula 1 car — the tiniest bump at enormous speed makes itself known immediately.
The speed of light in a vacuum is physics' metronome: it sets the rhythm for all processes. If it falters, the familiar harmony collapses. Neutrinos—ubiquitous but almost intangible particles from space—can check if this rhythm ever stumbles under extreme conditions. Future detectors like GRAND and POEMMA will catch neutrinos at the highest energies, where any deviation would appear brightest. If the constancy of the speed of light is violated, neutrino types will transform into each other differently: there will be an anomalously high number of tau neutrinos.
Calculations promise that the new facilities will catch a rhythm glitch tens of times fainter than any previous experiment. Astonishingly, even a microscopic violation of the law of Lorentz and Einstein would cause not just a slight off-key note but a true cacophony—detectors would be flooded by a shower of particles of a single kind. And then the music of the universe would sound entirely new. Or the rhythm will prove flawless, and we will once again confirm its harmony.
🎯 Neutrinos are so elusive that trillions of them pass through your fingernail every second, hardly noticing you.