Chapter 32, Problem 18Q

To determine

The possibility of finding particle made up of two quarks and no antiquarks and particle having two quarks and two anti-quarks.

Answer to Problem 18Q

Solution:

It is not possible to find a particle that is made up of two quarks and no anti-quarks. It is possible to have a particle composed of two quarks and two anti-quarks.

Explanation of Solution

A particle having two quarks and no antiquarks because the charge of that particle is fractional which has never been observed.

Thus, it is not possible to find a particle that is made up of two quarks and no anti-quarks.

Yes, it is possible to have particle composed of two quarks or two anti-quarks. These are known as mesons. For example, ${\pi }^0=u\overline{u}+d\overline{d}$. The spin is 0 or 1.