Why graviton "has spin 2"?
Tracing a parallelism between gravitational waves and gravitons...
what can be seen as the spin 2 for the wave?

Dear marcofuics:

On Aug 29, 3:08 am, marcofuics wrote:
Why graviton "has spin 2"?

It is a requirement of the "geometry". Some good hits on Google with:
graviton "spin 2"

Tracing a parallelism between gravitational
waves and gravitons...
what can be seen as the spin 2 for the
wave?

The expectation that they can only convey momentum in quadrature.
Meaning that gravity waves do not express their effects in the orbital
plane of two bodies, or aligned with the poles, but in between. My
guess.

David A. Smith

On 29 Ago, 21:37, dlzc wrote:
Dearmarcofuics:

On Aug 29, 3:08 wrote:

Why graviton "has spin 2"?

It is a requirement of the "geometry". Some good hits on Google with:
graviton "spin 2"


)
My questin arises from the fact that a quantum theory of gravitation
does not exist, so the idea of a graviton2spinned is just a
resemblance, a trial test???
Maybe captured from the GR evidence that gravitational waves have some
peculiarities:

maybe for the fact they base on a tensorial 4X4 aspect?




The expectation that they can only convey momentum in quadrature.
Meaning that gravity waves do not express their effects in the orbital
plane of two bodies, or aligned with the poles, but in between. My
guess.



hmmmmm

A question:
An entity, with no mass, whatever its spin could be, has only 2 states
of polarization?

For example, a graviton -- spin 2 -- ISuppose: States 2;1;0;-1;-2
But it seems that graviton has only 2 polarization


Null mass means only 2 states?


Impossibility to observe that body as at rest?

And why then when could think at a fermion (half integer spin) with
mass?
All the fermions have a not null mass?

Dear marcofuics:

On Aug 30, 1:36 am, marcofuics wrote:
On 29 Ago, wrote:

Dearmarcofuics:

On Aug 29, 3:08 wrote:

Why graviton "has spin 2"?

It is a requirement of the "geometry". Some
good hits on Google with:
graviton "spin 2"

)
My questin arises from the fact that a quantum
theory of gravitation does not exist, so the
idea of a graviton2spinned is just a
resemblance, a trial test???

It is an attempt to create an exchange particle for quantum mechanics
to achieve gravitation, and sneak spacetime into the back door.

Maybe captured from the GR evidence that
gravitational waves have some peculiarities:

maybe for the fact they base on a tensorial
4X4 aspect?

Study more and let us all know. I think the quest for the graviton is
doomed, but who really knows?

The expectation that they can only convey
momentum in quadrature. Meaning that
gravity waves do not express their effects
in the orbital plane of two bodies, or
aligned with the poles, but in between. My
guess.

hmmmmm

A question:
An entity, with no mass, whatever its spin
could be, has only 2 states of polarization?

Photons fit this description, substituting "2 spin states" for "2
states of polarization". Polarization is a system thing, so limiting
polarization to two values is incorrect for a photon.

For example, a graviton -- spin 2 --
I Suppose: States 2;1;0;-1;-2
But it seems that graviton has only 2
polarization

Null mass means only 2 states?

Impossibility to observe that body as
at rest?

And why then when could think at a
fermion (half integer spin) with
mass?
All the fermions have a not null mass?

You are over my head. You had not received a responseto yoru original
question for some time, so I figured I'd take a stab at an answer for
you.

Sorry. This may not be the best group to investigate quantum
mechanics on... perhaps sci.physics.research (which is moderated).

David A. Smith