Poll: How many elementary fermions?

  • Thread starter arivero
  • Start date

How many elementary fermions in final theory?

  • 0

    Votes: 0 0.0%
  • 1

    Votes: 0 0.0%
  • 2

    Votes: 1 16.7%
  • 4

    Votes: 1 16.7%
  • 8

    Votes: 0 0.0%
  • 16

    Votes: 0 0.0%
  • some low number

    Votes: 2 33.3%
  • around 90

    Votes: 0 0.0%
  • finite, but a lot

    Votes: 2 33.3%
  • infiniry

    Votes: 0 0.0%

  • Total voters
    6
  • #1
arivero
Gold Member
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The question, broadly, is how many elementary particles do you expect to be in the final theory. But just to be more concrete, I have narrowed it to "fermions" as Pauli principle is the closest thing we have to ancient "impenetrability", fitting the naive idea of particle.
 

Answers and Replies

  • #2
40
0
Why are all the suggested answers powers of 2?
 
  • #3
arivero
Gold Member
3,311
63
Well, in part because when you are thinking about the question you think about "degrees of freedom" of fields, and this usually come to duplicate or halving the answer. For instance, if you decide that particle and artiparticle are two different elementary objects, you multiply by two. If you decide that helicities 1/2 and -1/2 are the same particle, you divide by two. So the likeliest answer will be something as n*2^m... note that by restricting to fermions I ruled out the number of Higgses and other bosons.

Then, as always, the poll does not cover all the possibilities. Reasoned comments are wellcome :-)

Alejandro
 
  • #4
selfAdjoint
Staff Emeritus
Gold Member
Dearly Missed
6,786
7
six leptons and six quarks, plus antiparticles, makes 24. I don't consider "fermionic" particles in super symmetry to be real fermions.
 
  • #5
damgo
^^^ Sracist.
 
  • #6
selfAdjoint
Staff Emeritus
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PCino
 
  • #7
chroot
Staff Emeritus
Science Advisor
Gold Member
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Originally posted by damgo
^^^ Sracist.
LOL!

You know you're a nerd when you get jokes like this!

- Warren
 

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