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aqa a level physics > 2 > Flashcards

2 Flashcards

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1
Q

What are hadrons ?

A

Particles and antiparticles that can interact through the strong interactions

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2
Q

Examples of hadrons?

A

Protons, neutrons, pi mesons, K mesons

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3
Q

What are leptons

A

Particles and antiparticles that do not interact through the strong interaction

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4
Q

Examples of leptons

A

Electrons, muons, neutrinos

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5
Q

What are baryons?

A

Baryons are protons and all other hadrons (including neutrons) that decay into protons, either directly or indirectly

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6
Q

What are mesons?

A

Hadrons that do not include protons in their decay products. In other words, kaons and pions are not baryons

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7
Q

What is a muon?

A

Negatively charged particle with a rest max over 200 times the rest mass of an electron

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8
Q

What is a pion

A

Can be positively, negatively or neutrally charged which has a rest mass greater than a muon but less that a proton

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9
Q

What is a kaon

A

Positively, negatively or neutrally charger what has a rest mass greater than a pion but less than a proton

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10
Q

What does a kaon decay into?

A

Pions OR
A muon and anti neutrino OR
An anti muon and a neutrino

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11
Q

What does a charged pion decay into?

A

Muon and anti neutrino OR
An anti muon and a neutrino OR
A pi 0 meson decays into high energy photon

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12
Q

What does a muon decay into?

A

An electron, an anti-electron neutrino and a muon neutrino

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13
Q

What does an anti muon decay into?

A

Positron and a neutrino

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14
Q

What quarks are mesons made up of?

A

Quark and antiquark pair

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15
Q

Baryons/antibaryons quark combination

A

Baryon - 3 quarks
Antibaryon - 3 antiquarks

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16
Q

What is the difference between hadrons and lepton

A

Hadrons:

  • made of quarks
  • not fundamental
  • can be split further

Leptons:

  • ‘light’ fundamental particles
17
Q

What is the exchange particle of the strong nuclear force?

A

Pion

18
Q

Lepton Rules:

A
  1. A neutrino/antineutrino can change into/from its corresponding charged lepton
  2. In muon decay, the muon changes into a muon neutrino. Along with an electron and anti electron neutrino

aqa a level physics (2 decks)

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