samedi 5 mars 2022

The Problem with Higgs

I see that the most recent prior thread on the Higgs particle dates from 2018 so maybe it is time to see what's been going on recently.

I've read this article twice and am just about following it but I gather it appears that there is a problem with Higgs. It's just too light.

Crisis in Particle Physics Forces a Rethink of What Is ‘Natural’
https://www.quantamagazine.org/crisi...ural-20220301/

Quote:

At first, the community despaired. “You could feel the pessimism,” said Isabel Garcia Garcia, a particle theorist at the Kavli Institute for Theoretical Physics at the University of California, Santa Barbara, who was a graduate student at the time. Not only had the $10 billion proton smasher failed to answer a 40-year-old question, but the very beliefs and strategies that had long guided particle physics could no longer be trusted. People wondered more loudly than before whether the universe is simply unnatural, the product of fine-tuned mathematical cancellations. Perhaps there’s a multiverse of universes, all with randomly dialed Higgs masses and other parameters, and we find ourselves here only because our universe’s peculiar properties foster the formation of atoms, stars and planets and therefore life. This “anthropic argument,” though possibly right, is frustratingly untestable.
Progress is being made (maybe) but

Quote:

A candidate for the fundamental theory of gravity and everything else, string theory holds that all particles are, close up, little vibrating strings. Standard Model particles like photons and electrons are low-energy vibration modes of the fundamental string. But the string can wiggle more energetically as well, giving rise to an infinite spectrum of string states with ever-higher energies. The hierarchy problem, in this context, asks why corrections from these string states don’t inflate the Higgs, if there’s nothing like supersymmetry to protect it.

Any inspired guesses as to where the current research is leading? Is there a breakthrough coming or are we all completely lost? Maybe it really is turtles all the way down and there is no resolution?

Be prepared to step into the world of IR and UV scale decoupling, Nnaturalness, and EFT.

I guess TOE is still a dream. :(


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