mitchell porter's latest activity

It turns out that the 500-page paper had a forerunner in 2000 that's just 100 pages, so it might be easier to read. :-) "de Sitter...

Indeed. The idea that the Yukawa couplings of the Standard Model arise from a dynamical process which @arivero's Koide's waterfall...

An anonymous string theorist ("Stringmaster") showed up at Peter Woit's blog to state an abbreviated version of what they think this...

Do you remember what prompt you used to generate that image? Gizmodo recently ran an article asking "whatever happened to string...

I don't know about Manin, but complex gauge theory has seen use in pure math, e.g. in the Hitchin fibration (also known as the theory of...

I thought of posting this under Particle Physics, but it does go slightly beyond standard model, and in a way that could point to some...

Just to be clear, I claimed the problem was that chiral gravi-GUTs want to use SU(2)R as the gravitational gauge group, but in...

I think the summary in Sabine Hossenfelder's new video is excellent. Many important points made, I have bolded two at the end that...

Formally you could do it but that's not really a gravi-GUT any more, or at least the gravitational SU(2)R is no longer united with the...

If you're asking about vacuum selection, no one's even thinking about it. The focus in string phenomenology is still just to find vacua...

I do not see anything in their argument that actually relies on the topic being quantum gravity. They could have written a paper...

The standard model gauge group is SU(3) x SU(2)L x U(1)Y. Before the Higgs mechanism comes into play, the latter two subgroups give rise...

Gravi-GUT theories turn out to play a major role in the alternative physics of the past several decades. E8 theory by Garrett Lisi...

That's not the problem, the problem is that the existence of negative energy particles allows endless materialization without violation...

I report two paper which provide examples of ingredients one might expect in a field-theoretic treatment of the sbootstrap. "Color...