What process create leptons?

1. Some electrons were formed during the Big Bang from the combination of high-energy photons. Electrons are also formed during Beta decay of Neutrons.

Electrons are also formed during the decay of Tau Leptons. Electrons are also formed from the decay of Muons. It is also thought that electrons can be created at the event horizon of a Black Hole.As far as I can tell, all of these are naturally occurring events.

2. Muons are formed from pion decay in the upper atmosphere, where the pions are created from the collisions of cosmic rays with nucleons in the upper atmosphere. Muons are much like an electron but around 200 times more massive.

Muon beams are produced by physicists by colliding hadrons at high energies to produce pion beams that quickly decay to muon beams over short distances. Thus, muons are produced naturally and artificially.3. Tauons are produced by colliding positrons and electrons at high energies in a particle accelerator.

Tauons are also much like electrons but around 3477 times more massive. I had the pleasure of directly asking Martin Perl (who won the Nobel Prize in physics for the discovery of the Tau) where the extra mass comes from. S answer was very simple, and went something like this: "You're accelerating particles to extremely high energies in the particle accelerator, which uses enormous amounts of electric energy to power the apparatus.

There's a huge amount of energy going into the collision of the particles near the speed of light, and as Einstein showed with E=Mc^2; energy *is* mass (and mass *is* energy), so the extra mass of the Tau comes from the energy going into the accelerator apparatus. " (And then the Tau decays and it's gone.) So Tau leptons are produced artificially, which doesn't preclude the possibility that they could be produced naturally as well, but they decay in 2.9x10^-13 seconds. For natural creation of Tauons, you'd need to find a naturally occurring source of high energy hadron collisions, perhaps near the event horizon of a black hole or during the supernova explosion of a star, but no Tau particles produced in those situations would survive for us to experience them on Earth, so all Tauons that we experience are produced artificially.4.

All of the neutrinos are produced in beta decay, which is a natural process.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.