particles

[marion]

Which of the following far outnumber all of the other three in the universe? photons, neutrons, protons, neutinos?

[LucasVB]

Neutrinos. Do I get a prize? :P

[Sylas]

Neutrinos. Do I get a prize? :P

Is it more than the photons?

I've see figures quoted of about 410 photons per cc, and 336 neutrinos per cc. The neutrino background, however, is tough to measure; so these numbers rely on theory and the early universe. The predicted ratio is, I think 9/11; and that fits those numbers.

Ref: Precision Detection of the Cosmic Neutrino Background, by R.E. Lopez et. al, (Phy Rev Letters, Vol 82, No 20, 17 May 1999)

Cheers -- Sylas

[publiusr]

How-about a list of different kinds of particles?

http://en.wikipedia.org/wiki/List_of_particles