3 ms·
> They simply add a series of possible “corrections” to general relativity that might become important at short distances. Say you want to predict the chance th
by platz 5y ago
> They simply add a series of possible “corrections” to general relativity that might become important at short distances. Say you want to predict the chance that two gravitons will interact in a certain way. You start with the standard mathematical term from relativity, then add new terms (using any and all relevant variables as building blocks) that matter more as distances get smaller.
How do you know what the correct values/labels are.
- peteradio 5y agoYou can throw all sorts of interaction terms with unknown coefficients in there and the renormalization will pare down any inconsistent with large distance symmetries. The remaining unknown coefficients are equated to combinations of known and unknown physical constants, to find the unknown ones requires a new measurement (AKA massive international experiments or cosmological observation). edit: Weinberg explains: https://www.int.washington.edu/PROGRAMS/talent13/refs/weinberg_rg_good_thing.pdf https://www.int.washington.edu/PROGRAMS/talent13/refs/weinbe...