Einstein - Part III

What is Quantum Chromodynamics (QCD) ?

1.      It is the theory of quarks and gluons.

2.      It is the generalization of Quantum Electrodynamics (QED).

3.      BASIC CONCEPT OF QED à The response of photon to electric charge

à Emission of a photon by a charged particle

The elementary act combined with the electric and magnetic forces from atomic to cosmic scales determine the construction of various elements.

In this way all the content of Maxwell’s equations for radio waves and light, Schrodinger’s equation for atoms and chemistry & Dirac’s more refined version including spin – are encoded in QED.

QCD	QED
QCD  is a bigger domain than QED.
There are 3 kinds of charges in QCD. They are called as quarks. red green blue They are known as colours.	There is only one charge called as electric charge.

Every quark has one unit of one of the colour charges. Quarks also come in different flavours. The important two that play a major role in ordinary matter are ‘u’ and ‘d’.

u à up. ( u quarks à a unit of red charge)

d à down. (d quarks à a unit of green charge)

and so on, for a total of 6 different possibilities.

Instead of one phtoton that responds to electric charge, QCD has eight color gluons that can either respond to different colour charges or change one into another.

There exists a symmetry here which makes things less complicated.

e.g. If you interchange red with blue everywhere, you must still get the same rules.

                                          A two-jet event: The tracks of particles emerging from 

                                         the high-energy collision @ the large Electron Positron 

                                         Collider (LEP) @ the CERN laboratory near Geneva

                                         mark the directions set by an underlying quark & antiquark.

CONCLUSION:  QCD is faithfully encoded in a single elementary act & its symmetry cousins. Solving the equations of QCD mathematically can be very difficult, but if they are solved, the outcome is unambiguous.

Note: I welcome both positive and negative criticisms, since I think both can improve my writing a lot better. Pleased to rectify errors if found any.

See u all with the continuation of this in the next post.