Year 12 Particle Physics Part 1 AQA Physics A

The energy of a photon is directly proportional to:

• Its wavelength

• Its amplitude

• Its frequency

• Its speed

Which of the following is a valid combination for a proton?

• uud

• udd

• ddd

• uus

Which of the following is always conserved in all particle interactions?

• Strangeness, charge, and energy

• Baryon number, charge, and energy

• Lepton number, strangeness, and energy

• Momentum, strangeness, and baryon number

In beta-minus decay, a neutron decays into:

• A proton, an electron, and an antineutrino

• A proton, a positron, and a neutrino

• A neutron, an electron, and a neutrino

• A neutron, a positron, and an antineutrino

In a Feynman diagram for electron capture, which particle mediates the interaction?

• Z boson

• Photon

• W⁺ boson

• Pion

Which of the following correctly describes a meson?

• A particle made of three quarks

• A particle made of a quark and an antiquark

• A particle made of two antiquarks

• A particle made of three antiquarks

A muon and an antimuon annihilate to produce the minimum number of photons.

What is the maximum wavelength of the photons?

• 5.9 × 10⁻¹⁵ m

• 1.2 × 10⁻¹⁴ m

• 5.9 × 10⁻⁹ m

• 1.2 × 10⁻⁸ m

The quark combination of a particle is sū.
Which is true for this particle?

• It has a baryon number of 1

• It has a charge of −1.6 × 10^–19 C.

• It is a pion.

• It has a strangeness of -1/3

The ∑⁰ baryon, composed of the quark combination uds, is produced through the strong interaction between a π⁺ meson and a neutron.π⁺ + n → ∑⁰ + X
What is the quark composition of X?

• us̅

• ud

• ud̅

• uds̅

Which statement concerning the forces between particles is incorrect?

• Leptons experience the weak interaction.

• Leptons experience the strong interaction.

• Hadrons experience the weak interaction.

• Hadrons experience the strong interaction.