HI Pranab!
I did some research on this subject but I only found references to Fermi and not Yang.
and here is what I have found, which I believe has relevance to this question. (under Substructure)
The Current theories due seem to suggest a sub quark , but it's still only theory and at present is still not verifiable.
Take a look here at this link for quarks ;
http://en.wikipedia.org/wiki/Quark
, its fascinating indeed!
From what I have found in this article, they are looking! The Implications are astounding! though at least!
Some argue it can only exist in the lab! But I would say that Mother Nature, can out do us, in in both!
We seem to have a question within a question where theoretical particles are concerned, I do not find this unusual or unique in this field.
why not Sub2 quarks!
I dont have the knowledge to argue either way.
I have a sneaky suspiscion that there is alot more to find, even in the lab as far as Particle Physics are concerned, call it intuition!
Particle Physics are not my cup of tea, so to speak, and Im no expert either, but after reading and following links and references that I have posted above, you have left me with so many more questions, You have sparked my interest, and I seem to have a lot to learn.
thank you for helping to broaden my horizons!
Now you have me thinking of Gluons!
Dennis
