Spin 2 graviton will appear to us as spin 0,1 or 2

[touqra]

Is it true that spin 2 graviton will appear to us as spin 0,1 or 2, since it has a momentum component in the bulk? How about fermions and other spin bosons ?

 

[Marco_84]

Is it true that spin 2 graviton will appear to us as spin 0,1 or 2, since it has a momentum component in the bulk? How about fermions and other spin bosons ?

It is a consequence of the su(2) representation dimension, you can chek it bye direct calculation on tensors formalism ;)

here a forum https://www.physicsforums.com/showthread.php?t=91769

 

[Entropia]

The statement that a spin 2 graviton will appear to us as spin 0, 1, or 2 is partially true. The spin of a particle is a fundamental property that describes its intrinsic angular momentum. In the case of a graviton, its spin must be either 0 or 2, as these are the only allowed values for a massless particle. However, the way in which we observe a graviton can make it appear to have a different spin.

This is because the spin of a particle is not an observable quantity, meaning it cannot be directly measured. Instead, we infer the spin of a particle based on its interactions with other particles. In the case of a graviton, its interactions are described by the theory of general relativity, which treats it as a spin 2 particle. However, in certain scenarios, such as when the graviton is moving at high speeds or interacting with other particles, its spin can appear to be different.

In the context of the bulk, which refers to the extra dimensions in string theory, the momentum component of a graviton can also affect how it appears to us. This is because the extra dimensions can act as a source of momentum for the graviton, causing it to behave differently than in our four-dimensional spacetime. In this case, a spin 2 graviton can appear to us as a spin 0, 1, or 2 particle, depending on the specific scenario.

As for fermions and other spin bosons, their spin will also be affected by the bulk and other interactions, but the allowed values for their spin will remain the same. For example, a fermion will always have a spin of 1/2, but its interactions with the bulk may cause it to behave differently than in our four-dimensional spacetime.

In summary, while the statement that a spin 2 graviton will appear to us as spin 0, 1, or 2 is partially true, it is important to consider the context and interactions that may affect how we observe the spin of a particle. The spin of fermions and other spin bosons will also be affected by these factors, but the allowed values for their spin will remain the same.