ATLAS and CMS combined their results recently and it shows that higgs mass is ~125 GeV.

Theoretical physicists try to figure out the "low mass" of the Higgs which causes hierarchy problem at high energy scales. They support that we need to have a model beyond the SM to explain the issue.

I understand the mass correction of higgs getting bigger and bigger when you are getting close to high energy scales. What I do not understand is observables such as amplitude, cross section and physical mass not be effected of any cut-off scale. So, what makes us to think any model beyond SM? Why do we need it?

EDIT: I know Higgs mass has a quadratic diverge contribution and all articles I read so far say that quadratic divergence is much worse than the logarithmic divergence and it should be fine-tuned. I am looking more of a physical and intuitive explanation.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.