Admin UjjaL has found the question from our fan about the colors few days back. So, I wish to share in brief about the colors of the quark today. After the existence of quarks, in 1964, Oscar W. Greenberg introduced the notion of color charge to explain how quarks could coexist inside some hadrons in otherwise identical quantum states without violating the Pauli exclusion principle. The theory of quantum chromodynamics has been under development since the 1970s and constitutes an important component of the Standard Model of particle physics. Colors of the quarks are the additional quantum number which plays the same role in strong interaction between quarks in chromodynamics, as electric charge does in electrodynamics between the electrons. There are three colors of the quarks which are red (R), green (G), and blue (B). For anti quarks, the colors are anti red, anti green and anti blue. According to color hypothesis, all these quarks in a baryon have different colors. Since hadrons seem to be composing of quarks, the strong interaction between hadrons should be between the quarks present on them. The quarks interact through other particles called gluons and thus gluons must be represented as combination of a color. It is found that a blue quark emits a blue anti red gluon and becomes the red quark and a red quark absorbs such gluon and become blue quark. Thus, the field that binds the quarks is called a color field and the branch is the quantum chromodynamics.
Posted on: Wed, 31 Jul 2013 17:03:55 +0000
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