As well as a hadron is divided into quarks, is a lepton divisible into more fundamental particles? Based on that idea, I tried to introduce a composite model of lepton in the following site;

http://hecoaustralia.fortunecity.com/lepton/lepton.htm

Experiments investigating this have shown no structure, though.

That doesn't mean that they have no structure though - just that current experiments were too low resolution (ie. too low energy) to resolve the structure.

 

However, I personally would be very surprised to find substructure to leptons (or quarks) before the GUT scale at 10¹⁶GeV or so.

That doesn't mean that they have no structure though - just that current experiments were too low resolution (ie. too low energy) to resolve the structure.

 

However, I personally would be very surprised to find substructure to leptons (or quarks) before the GUT scale at 10¹⁶GeV or so.

 

It looks like almost impossible to reach the energy level of 10¹⁶GeV for human being...

Preon models explain some of the patterns of leptons but they come up short on several accounts:

 

Fermion families, preon models accomadate any number of families. Why are there only three n nature?

 

Matter vs Antimatter, GUTs naturally predict proton decay and CP violation, necessary ingrediantes for explaining the matter-antimatter imbalane in the univserse, no one has yet figured out how to incorporate these ingredietns into preon models.

 

Fermion masses, as we have seen preon models give us no help there.

It looks like almost impossible to reach the energy level of 10¹⁶GeV for human being...

 

Pessimist.

its only 1.6 MJ. the only problem we have is focusing that down to two particles colliding. i'm pretty sure we could do it if money and resources were no object.

Well... Kind of. Then we would need statistics.

As well as a hadron is divided into quarks, is a lepton divisible into more fundamental particles? Based on that idea, I tried to introduce a composite model of lepton in the following site;

http://hecoaustralia.fortunecity.com/lepton/lepton.htm

 

Look up Electron-positron annihilation where you see that an electron and a positron usually annihilate to produce two photons. In a way you can consider these photons to be more fundamental "particles" than the leptons, but it's wrong to think that the electron or the positron is divisible into photons or anything else. Also look up pair production.

 

PS: Collider experiments will be futile. It doesn't work like that.