With the synopsis and the thesis defenses knocking at the door, thought that refreshing some things might be useful. Came across things that I had never bothered to sit and think of before.
1. How do we know that there are gluons?
It basically involves observations of three-jet events at experiments in PERTA, DESY. The idea is that three-jets are formed when a quark emits a hard gluon. Further, there are stray hadrons in between two of the jets. For details, look up this Wiki-link.
2. Discovery of quarks came about through the Deep Inelastic Scattering experiments. The same principle: shoot high energy electrons on hadrons (baryons or mesons). Most of them go through; and the ones that get reflected show that they have been scattered from three points in the case of a baryon and two points for mesons. Of course, since electrons and these "scatters" interact through electromagnetics, itwas deduced that these scatterers carry fractional charge. And so hey presto: partons; and bingo: quarks! The entire process is inelastic; causing the initial hadron to break up completely.
1. How do we know that there are gluons?
It basically involves observations of three-jet events at experiments in PERTA, DESY. The idea is that three-jets are formed when a quark emits a hard gluon. Further, there are stray hadrons in between two of the jets. For details, look up this Wiki-link.
2. Discovery of quarks came about through the Deep Inelastic Scattering experiments. The same principle: shoot high energy electrons on hadrons (baryons or mesons). Most of them go through; and the ones that get reflected show that they have been scattered from three points in the case of a baryon and two points for mesons. Of course, since electrons and these "scatters" interact through electromagnetics, itwas deduced that these scatterers carry fractional charge. And so hey presto: partons; and bingo: quarks! The entire process is inelastic; causing the initial hadron to break up completely.
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