Correct Answer - Option 2 : K - meson
Concept:
Quark: A quark is a type of elementary particle and a fundamental constituent of matter.
Composite particles:
- Subatomic particles are made of more than one quark.
- Simple particles like protons are actually composites of multiple quarks.
Basically two types of composite particle: Leptons and hadrons.
Laptons: These are the particle which does not affect by the strong force.
Hadrons:
- A hadron is any particle that is made from quarks, anti-quarks and gluons.
- These are not elementary particles. They are made up of further elementary particles namely quarks.
Hadrons are again classified into two categories: Meson and baryon.
Difference b/w Meson and Baryon:
| Meson |
Baryon |
| These are the hadron particles that are made up of quark and anti-quark pairs. |
Hadron particles which are made up of three quark namely quarks, anti-quarks and gluons. |
| Examples of mesons are the p, h, r and w mesons. |
Examples of baryons are protons and neutrons. |
| These can have a spin of +1, 0 and -1.
|
These can have a spin of +3/2, +1/2, -1/2, -3/2 i.e. |
| integer multiple of spin quant quantum number: Boson Boson particle. |
These are also called Fermions. |
Explanation:
π -meson: These are also known as pions which are the lightest of all meson.
K-meson:
- These are also known as kaon.
- It has zero electric charges, and its mass is about one-half the mass of the proton.
- It is unstable and, once formed, rapidly decays.
μ- meson: These are also called muon which is an elementary particle with a negative charge and a half-life of 2 microseconds
From the above discussion, we can conclude that baryon is similar to K meson.
