Quarks explain the proton and the neutron. Yet no one has ever seen a quark by itself. If quarks are real, why has nobody knocked one out of a proton and looked at it?
Physicists have tried, with the hardest collisions their machines can produce. However hard a proton is hit, a lone quark never comes out.
An experiment searches for years for a quark traveling on its own. What has every search of this kind found?
No experiment has ever observed a free quark.
It finds none. Quarks exist only bound inside composite particles.
Has any experiment ever observed a quark on its own?
Where do quarks exist?
Jun says a hard enough collision will knock a quark out to be seen alone. Is Jun correct?
Which statement about quarks is correct?
A student plans to prove quarks exist by knocking one out of a proton and photographing it alone. What does every experiment so far say about the plan?
In which situation have quarks been observed?