The grand-unification tag has no wiki summary.
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Plot of gauge coupling unification [closed]
About the result of plotting running of 3 coupling constant, we think that we should get the correct one(MSSM).
But we get discontinuity at $ M_{susy}$.
If there something wrong in our formulae?
If ...
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Is the 125 GeV Higgs boson some kind of a “almost-commutative graviton” at the electroweak scale?
The clumsy "almost-commutative graviton" is provocative. I use it on purpose, to ask two questions in one :
The observation of only one Higgs and no supersymmetric particle below 7 TeV (up to now) : ...
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Why is E6 favored over E8 for GUT building?
What is the simplest explanation on why is E6 gauge group more favored as a group for Grand unified theory builders, while E8 is not? What about other exceptional groups? Which of them originate from ...
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status of +4/3 scalar as explanation of $t\bar t$ asymmetry
One of the early proposals for the Tevatron asymmetry on $t \bar t$ was a "fundamental diquark" with a charge (and hypercharge) +4/3, either in a triplet or a sextet colour. I am interested on the ...
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Is there some sort of Pati-Salam model with mixed generations?
The evidence for an approximate "lepton as fourth colour" symmetry is so overhelming in the particle spectrum that Hanlon's razor does not seem to apply. Still, my own incompetence fails to recognise ...
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What's the deepest reason why QCD bound states have integer charge?
What's the deepest reason why QCD bound states have integer electric charge, i.e. equal to an integer times the electron charge?
Given that the quarks have the fractional electric charges they do, ...
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Simple PDE vs String Theory
For the sake of simplicity, I’d like to believe that there is one master non-linear partial differential equation
governing physics. In particular, consider a Klein-Gordon form:
$$
\frac{\partial^2 ...
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Non-renormalizable corrections to GUT unification
While writing these answers: Hypercharge for U(1) in SU(2)xU(1) model and Is there a concise-but-thorough statement of the Standard Model? , it occured to me that the unification prediction for ...
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Introduction to Physical Content from Adjoint Representations
In particle Physics it's usual to write the physical content of a Theory in adjoint representations of the Gauge group. For example:
$24\rightarrow (8,1)_0\oplus (1,3)_0\oplus (1,1)_0\oplus ...
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What is the relation between extra dimensions and unification of theories?
One of the most used methods in unification of theories is the use of higher dimensions. How does it actually work? If these dimensions are extremely small curled up, how does it affect the universe. ...
