Two pebbles drop into water, and the ripples on the surface intersect, blending their patterns. Neutrinos behave much the same way: light particles that pierce us by the billions every second. They can transform from one type to another, like an actor changing masks. Physicists call this dance oscillations.
But what if the very stage on which neutrinos move is not perfectly smooth? In the Einstein–Cartan theory, space can be not only curved but also slightly twisted, like a spiral staircase. This twist is called torsion. The authors of the study examined how torsion affects neutrino transformations. It turns out that the new oscillation formulas depend on the orientation of the particle's spin: its intrinsic rotation.
Practically, this means that by observing neutrino fluxes from the Sun or distant supernovae, one can search for traces of torsion fields. This approach turns the particles themselves into sensitive probes that feel the finest geometry of the universe. And then the ripples on the water will tell not only about the thrown stones, but also about what the water itself is made of.
Neutrinos interact with matter so weakly that they can pass through a light-year of lead without hitting a single atom.
In Stanisław Lem's novel "Solaris," the ocean affects the very fabric of space — much like a torsion field might influence particles passing through it.