Re: About the Exploration of the Electron

On Aug 5, 11:33 am, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Aug 5, 10:00 am, Matthew Johnson <matthew_mem...@xxxxxxxxxxx>
wrote:



In article <54fbc41b-f1f2-4bac-abfc-38779007a...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
PD says...

On Aug 4, 2:36=A0pm, Loui...@xxxxxxxxxxxxxxxxxx wrote:
What is the inner structure of the Electron?

We don't know. There hasn't been any measurement so far that's been
able to detect any.

If there is a structure, though, then this structure SHOULD help
account for both the commonalities and differences with the muon, the
tau, and the three neutrino species. (I.e., an answer for the electron
in isolation is probably not very helpful.)

Questions about experiments with electrons:
- Have scattering experiments conclusively shown that the electron is
not composed of smaller and more fundamental particles? Or ....?

No, it's not conclusive. It's only true that to the degree we've
measured it SO FAR there is no evidence of structure.

And if there were structure, why would we expect any evidence of it in our
colliders? Surely it would only show up at energies much higher than we we can
reach in a collider.

We don't know that. We only know that it doesn't have structure in the
colliders used to date. There is absolutely no way to determine that
the next collider will not find evidence of structure.

Now, there are *theories* that, IF TRUE, indicate that any structure
is not likely to be reached in colliders anytime soon. But we've been
surprised before...



That is why we should look instead for evidence of it in astrophysics, since it
is only in super massive stars that we get energies likely to reveal any inner
structure of the electron. But AFAIK, we don't see it there either.

[snip]

PD,
I have read your valiant attempts to answer this question. All true.

The electron magnetic moment (u) = -g(eh)/2m * (S/h)

where S is the electron spin, e is the electron charge, m is the
electron mass, and h is Dirac's version of Planck's constant; h/2pi.

g is a dimensionless measure of the moment. A Dirac point particle
has g = 2. QED predicts that vacuum fluctuations and polarization
slightly increase this value. Electron substructure would make g
deviate from the Dirac/QED prediction. Recent measurements of g give
a difference |delta-function g/2| < 15x10**-12.

This measurement limits the electron radius R < 6x10**-24 m. Compare
this to the proton radius of about 8.25×10-16 m.

If Louis wants to understand the structure of the electron, I
recommend taking a look at "The Road to Reality", by Roger Penrose,
Chapter 25.6, 'The zigzag picture of the electron".

--Best regards,
--Mike Jr
.

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