Particles in nature

[Shyan]

Are mesons and baryons,other than protons and neutrons,observed in nature?where?
what about leptons,other than electrons,positrons and neutrinos?
thanks

[AstrophysicsX]

What mesons, leptons, and/or baryons are you talking about?

[robert2734]

Muons are observed in cosmic ray collisions. So are mesons containing strange.

[Bill_K]

Are mesons and baryons,other than protons and neutrons,observed in nature?
Where else is there?

[Shyan]

Where else is there?
I mean not produced artificially.

[ZapperZ]

I mean not produced artificially.

What does that mean? Are electrons emitted from a thermionic cathode "artificially produced"? Give an example of something you consider that is not "artificially produced".

Zz.

[Meir Achuz]

Many mesons, baryons, and leptons are observed in cosmic rays at high altitudes. Fortunately for us, most of them don't reach the earth.

[Shyan]

Thanks meir
And Zapper you know what I mean so what's the point of such discussions?
there is no e.g. top quark in a proton,but When we collide two protons,we may get one.Maybe its not true but not so far,if we say that top quark is produced artificially.
If I'm wrong,explain it,don't give useless posts.(Sorry for being that direct and thank you for devoting time to this thread)