Quarks and Leptons – MCQs (set 4)

Which of the following is the β⁻ particle?

'Fundamental' or 'elementary' particles that are not made up of smaller particles. What is the most common type of fundamental particle in the universe?

• atom

• meson

• neutrino

• quark

The table shows the charge on some quarks. Which of the following is a possible quark composition of a π⁺ particle?

• dd̄

• uū

• dū

• ūd

A CERN detector shows a signal only in the hadronic calorimeter. No signal is observed in the tracker, electromagnetic calorimeter or muon chambers. Which particle must be responsible for this signal?

• pion

• neutrino

• photon

• neutron

What are the fundamental particles that make up an atom?

• quarks, gluons and electrons

• protons, neutrons and electrons

• quarks, photons and electrons

• quarks, gluons and neutrinos

The K⁺ meson is most likely to decay to

What is the charge on the particle dds?

• e

• 1/3 e

• -2/3 e

• -e

• 0

What type of elementary particles are electrons?

• quarks

• leptons

• photons

• bosons

Light is made up of which class of elementary particle?

• quarks

• leptons

• photons

• bosons

Which particle is made up of two down quarks and one up quark?

• A) atom

• B) electron

• C) neutron

• D) proton