Re: Gravitational waves

On 29 Ago, 21:37, dlzc <dl...@xxxxxxx> wrote:
Dearmarcofuics:

On Aug 29, 3:08 am,marcofuics<marcofu...@xxxxxxxxxxxx> 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?



.

Relevant Pages

  • Re: spin 2 particles
    ... > so the spin of a graviton which is derived from QM might not be equal ... I didn't understand this whole spin issue until I read Brian Hatfield's ... emission or absorption of aa single graviton by either particle must ... universally atractive (like charges and opposite charges attract). ...
    (sci.physics.research)
  • Re: Do photons take part in gravity ?
    ... Pasadena, Calif., noticed anomalies in telemetry data dating from as ... And finally, if it points along the spin axis of the probes, ... Graviton IS the field of photon, ...
    (sci.physics.relativity)
  • Re: What is the helicity of Higgs Bosons?
    ... No elementary spin zero particles have been empirically observed. ... note that neither the Higgs boson nor the gravition have been observed ... The graviton would, as a spin 2 particle, have ...
    (sci.physics.research)
  • Re: Why must force carriers have integer spin?
    ... > must have integer spin? ... > emission or absorption of a single graviton by either particle must ... > leave both particles in the same internal state. ... > possibility that the graviton carries half-integer spin (for example, ...
    (sci.physics.particle)
  • Re: Do photons take part in gravity ?
    ... Graviton IS the field of photon, ... There are not spin 2 particles in the detectors on earth ... i was not spwaking on balck holes ...
    (sci.physics.relativity)