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Results tagged with beyond-the-standard-model
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user 1486
Use this tag for questions beyond the standard laws of physics (General Relativity and the Standard Model) if a more specific tag, like "string-theory", "loop-quantum-gravity", "supersymmetry", etc. do not apply.
2
votes
Accepted
Would observed limit on resonant double Higgs production the same if the scenario considered...
Since no-one else is tackling this...
The report from CMS at CERN is about looking for production of pairs of Higgs bosons. In the introduction, they say this could be enhanced beyond what occurs in t …
- 13.4k
3
votes
Accepted
GUT that includes all 3 particle families into a large group?
Jacob Bourjaily derives three Standard Model generations from an E8 singularity here and here. (See comments by Lubos, 1 2 3.)
- 13.4k
4
votes
Do we think we know how to match the Standard Model from String Theory?
Almost always in string theory papers, a "standard model vacuum" means a "supersymmetric standard model vacuum", meaning a scenario in which, at low energies, you have the superfield counterparts of t …
- 13.4k
1
vote
Emergent physics in the gap between the Planck scale and the "size" of quarks
I will let someone else answer this properly. But briefly: the existence of different characteristic phenomena at different scales - different length scales, or equivalently, different energy scales - …
- 13.4k
1
vote
Accepted
Is it possible that rescuing the Idea of a Baryo/lepto-dynamic Field had some Relevance in t...
Gauging baryon number, lepton number, or a combination thereof, is a well-known option in particle physics. In particular, the combination "B-L" is often gauged, e.g. in Pati-Salam unification.
Dozens …
- 13.4k
2
votes
Accepted
Who are the present 'superstars' pursuing significant breakthroughs toward a Theory of Every...
The current situation of physics is that we have a standard model of particle physics, which (if we ignore astronomical phenomena) accounts for most things, and which may easily (but a little arbitrar …
- 13.4k
3
votes
Is the Standard model an effective field theory (EFT)?
Before this question gets closed, let me point out that there is something called "Standard Model Effective Field Theory" (SMEFT) which is distinct from the Standard Model (SM) as you find it in textb …
- 13.4k
1
vote
Is there a clean mathematical way to deduce grand unification from string theory?
It's straightforward to implement grand unification in string theory, but it's not required.
- 13.4k
3
votes
Can $E_8 \times E_8$ contain the standard model?
This is just a quick informal answer; I skip details and may even miss important cases and loopholes...
The standard model has been obtained many times from E8xE8 heterotic string theory. But only on …
- 13.4k
10
votes
Accepted
How can the mass of Higgs give preference to SUSY vs multiverse?
I have not seen the film. But this was not "supersymmetry versus multiverse". It was "supersymmetry without multiverse" versus "supersymmetry with multiverse".
According to quantum field theory, a l …
- 13.4k
3
votes
Accepted
A Game Of The Number Of Space-Time Dimensions
Nielsen identifies a quantity, a ratio of "Casimirs", which he thinks is maximized by the particular gauge symmetry groups and space-time symmetry groups that we see.
He has previously had the idea …
- 13.4k
1
vote
What is the way to work out the running of lepton masses?
These particles acquire their masses via the yukawa coupling to the Higgs field. Above the electroweak phase transition, the Higgs vev is zero and so the mass is zero (ignoring any effective "thermal …
- 13.4k
3
votes
Is a QFT always an EFT coming from something deeper?
By my reading, Zinn-Justin is more emphatic than Weinberg. Zinn-Justin seems to think that the very presence of ultraviolet divergences in a local QFT means that it is necessarily incomplete; whereas …
- 13.4k
6
votes
Accepted
Does the sedenion algebra offer a grand unification theory?
Amateur would-be physicists (and quite a few professional physicists) have discovered many mathematical formulas for the unexplained constants of the standard model, such as for the fine structure con …
- 13.4k