/sci/ - Science & Math

>>5060985
But a neutrino doesn't interact electromagnetically. This means it doesn't emit or absorb photons - it can only interact with W or Z bosons. See the pic. It still exchanges momentum/energy in these events, but you can't measure anything without a change in momentum or energy, is this what you mean?

>So to say it exists is a bit like saying God exists - more a matter of faith than demonstration.
Well, every theory has to make some sort of assumptions. If this weren't true we couldn't predict anything in science. Although we can't measure space-time directly (at least for now, until we can detect gravitons), there's lots of evidence for its existence with the predictions of special and general relativity - http://relativity.livingreviews.org/Articles/lrr-2006-3/

Really, it all boils down to a model which can reproduce all of our existing experiments in one theoretical framework and simultaneously make predictions. The Einsteinian concept of "space-time" has been the only thing so far that's able to do it in a competent manner.