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As-Level Physics - Particles and Radiation > Hadrons And Leptons > Flashcards

Hadrons And Leptons Flashcards

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1
Q

What are hadrons?

A

Particles that can feel the strong nuclear force

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2
Q

Are hadrons fundamental particles?

A

No

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3
Q

What are hadrons made up of?

A

Quarks

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4
Q

What are the 2 types of hadrons?

A

Baryons and mesons

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5
Q

2 examples of baryons?

A

Protons and neutrons

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6
Q

What can you say about all baryons except a free proton?

What does this mean?

A

Can be unstable

All baryons except protons decay to become other particles

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7
Q

What are the antiparticles of baryons?

A

Antibaryons

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8
Q

Why don’t you find antibaryons in ordinary matter?

A

Antiparticles are annihilated when they meet the corresponding particle

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9
Q

What is the baryon number?

A

Number of baryons

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10
Q

What is the baryon number that means it must be conserved?

A

Quantum number

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11
Q

What happens to the total baryon number when particles interact and produce or emit new particles?

A

Stays the same

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12
Q

What does beta minus decay involve?

A

A neutron changing into a proton

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13
Q

What is beta decay caused by?

A

Weak interaction

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14
Q

When a neutron decays, what is formed?

A

Proton

Electron

Antineutrino

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15
Q

What do mesons interact with baryons via?

A

Strong force

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16
Q

Are mesons stable or unstable?

A

Unstable

17
Q

What are the 2 types of mesons?

A

Pions and kaons

18
Q

What are pions?

A

Lightest mesons

19
Q

What are kaons?

A

Mesons that are heavier and more unstable than pions

20
Q

What are leptons?

A

Fundamental particles that don’t feel the strong nuclear force

21
Q

How do leptons interact with other particles via?

A

Weak interaction

22
Q

Name a stable lepton?

A

Electron

23
Q

Name an unstable lepton?

A

Muon

24
Q

What do electron and muon leptons each come with?

A

Their own neutrino

25
Q

What is the charge and mass of neutrinos?

A

0 mass

0 charge

26
Q

Like the baryon number, what is the lepton number?

A

A quantum number

27
Q

What is the lepton number?

A

Number of leptons

28
Q

When are antineutrinos released?

A

In beta-minus decay

29
Q

What must be remembered about both baryon number and the 2 separate types of lepton number?

A

Must be conserved in all particle interactions

As-Level Physics - Particles and Radiation (7 decks)

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