A team of scientists has proposed a groundbreaking new theory on the Universe's origins, offering a fresh, radical take on the Big Bang's early moments. Unlike the widely accepted inflationary model, which involves speculative assumptions, the new model starts with the established concept of De Sitter space, aligning with dark energy observations. The scientists believe gravitational waves—ripples in space-time—were the key to seeding the formation of galaxies and cosmic structure, eliminating the need for unknown elements.
There’s nothing handwavy about renormalization, it’s just a way of describing the mathematics which is easier for a human brain to deal with, so we’ve standardised on it.
An unnormalised wave function can show you the relative probability of any given thing, but it makes like easier if you set the scale so that you can read an actual probably straight off it, rather than having to ask “relative to what?”