Here’s a link to the paper:
https://arxiv.org/abs/1801.08160
It says the dimensions considered are non-compact, so perhaps this isn’t a blow for string theory.
We stress that our results do not hold for extradimensional theories with compact extra dimensions (e.g. string theory or the ADD model). The extra dimensions need to be at least on the order of the wavelength of the gravitational waves (∼ 100 km) in orderto have a damping effect. In addition, there may be complications for theories with larger extra dimensions.
Read it, thanks.
Good point about the dimensions. Completely missed it in my reading.
Do you get run-on text in arXiv papers and abstracts, particularly where they change fonts? I get that no matter which device I’m on: PC, Mac, Kindle, smart phone, doesn’t matter.