How large is the Large Hadron Collider?

  • 27 cm
  • 2.7 km
  • 27 km
  • 270 km

The LHC ring is 27 km circumference.

What voltage is used to accelerate protons at the Large Hadron Collider?

  • 7 volts
  • 7 thousand volts
  • 7 million volts
  • 7 million million volts

The energy of a beam at the LHC is 7 TeV or 7 million million volts. When we collide two beams, the collision energy is twice this.

Which of these is a fundamental particle?

  • Deuteron
  • Electron
  • Neutron
  • Pentaquark

The electron is the only fundamental particle. The neutron is made from three quarks. The deuteron from a proton and a neutron. The pentaquark is an exotic state of five quarks discovered by the LHCb collaboration in 2015, which includes Oxford researchers.

Which of these particles has been discovered?

  • Graviton
  • Z prime boson
  • Higgs
  • Heffalon

The Higgs is the only one which has been discovered. The graviton and Z prime boson are theoretical particles. The Heffalon was the subject of a paper by Oxford professor Alan Barr, submitted on 1 April 2013.

Which of these decays of a Z boson is forbidden?

  • Quarks
  • Two muons
  • A single electron
  • Neutrinos

​​​​​​​The single electron is the only forbidden decay as this would not conserve electric charge. Z bosons can decay to particle-antiparticle pairs of quarks, neutrinos and muons. The muon channel is the one we are interested in as it is easy to identify.