Constraints for New Fundamental Force

[czes]

In the Holographic Universe hypothesis there aren't the forces at all. The effect of the force appeares according to the entropy due to the relation between the quantum information. Each relation causes a Planck time dilation and it causes the inertia and time flow. The sum of the relation creates the Dark Energy and te relative distribution causes an effect of the Dark Matter.
There aren't particles in the fundamental level.
http://en.wikipedia.org/wiki/Quantum_decoherence

 

[Rodsw]

Certainly, if a different symmetry is observed which can be described by a group action of U(1), SU(2), etc. The point is that we'll now have two different classes of gauge fields, accounting for two different local transformations.

Let's go back to this before we totally forgot about it.

So gauge field 1 Electroweak is described by U(1) x SU(2)

And gauge field 2 Dark Matter coupling (just example) is described also by U(1) x SU(2)

But how can two similar gauge symmetry group produce two different local transformations. Can you give an example of how it do it (if this is valid at all)?

 

[fzero]

Let's go back to this before we totally forgot about it.

So gauge field 1 Electroweak is described by U(1) x SU(2)

And gauge field 2 Dark Matter coupling (just example) is described also by U(1) x SU(2)

But how can two similar gauge symmetry group produce two different local transformations. Can you give an example of how it do it (if this is valid at all)?

The idea is that the new group can be of the same type, but it is a different copy. To be clear, we have the Standard Model group, G_{\textrm{SM}}=SU(3)\times SU(2)\times U(1), while the hypothetical new force is associated with some new group G_{\mathrm{new}}. The group G_{\mathrm{new}} can be U(1), SU(2), or something more complicated, but it is a completely different group, with its own transformation and associated gauge fields. The total gauge group of the model for new physics would be G_{\textrm{SM}}\times G_{\mathrm{new}}.

 

[nazarbaz]

What would be the effects of this hypothetical discovery on the quantum gravity approach ? Something that could ruin the attempt ?
The underlying idea is the "possibility" that the fundamental forces of our known physics are the proprieties of our actual universe, not of the targeted epochs or phenomena of quantum gravity...
Please correct me if you think this is silly...

 

[ohwilleke]

"two similar gauge symmetry group produce two different local transformations. Can you give an example of how it do it (if this is valid at all)?"

Imagine that there is regular matter that has regular electromagnetic charge and weak isospin.

Imagine that dark matter is composed of something called "mirror matter" and that mirror matter has mirror charge and mirror isospin that is mediated by the futon, the V boson and the Y boson, which follow precisely the same laws as and have the same properties as the photon, W boson and Z boson respectively do with respect to the corresponding properties of mirror matter. Imagine further that futons, V bosons and Y bosons never couple to regular matter, while photons, W bosons and Z bosons never couple to mirror matter.

Voila, I have just completely described how two identical gauge symmetry groups of the SU(2)xU(1) type produced two different local transformations.

Another fairly common proposal would be to propose something along the line of a theory in which quarks are themselves composed of three "preons" bound together by an exchange of "supergluons" that come in three "tints" which we might call black, gray and white, that we would call the "superstrong force" that is identical in all respects to the SU(3) gauge group of QCD except that the coupling constant of the superstrong force was much larger than the coupling constant of QCD. Not very original, I agree. But, honestly, how original is nature in always giving us gauge boson mediated gauge group forces that propagate bosons in essentially the same way the QED does?

 

[BDOA]

The first constraint is the anomally triangle diagrams, any new force needs to satisfy these constraints. However adding addition fermions could allow extra forces to exist. After that, the symmetry group
and the mass of the force carriers need to be found.

Any new force, needs to have hidden from previous investigation, this might happen if

If the force carrier has a large mass,
if the force is confined like QED,
if the force constant is very small, or
if the force is screened by very light particles.