Unit 1: Quarks And Leptons Flashcards

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0
Q

What is a pion?

A

It is a meson which can have either charge.

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1
Q

What is a muon?

A

A lepton that is a negatively charged particle and it is heavier than an electron.

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2
Q

What is a kaon?

A

It is a meson which can have either charge.

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3
Q

When are mesons produced?

A

Through the strong interaction yet they decay through the weak interaction.

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4
Q

Which particles are hadrons?

A

Particles that experience the strong interaction.

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5
Q

What are leptons?

A

Particles and antiparticles that do not interact through the stone interaction. They interact through the weak interaction and through the electromagnetic interaction if charged.

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6
Q

How do hadrons decay?

A

Through the weak interaction.

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7
Q

Leptons are…

A

Light and weak

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8
Q

Hadrons are…

A

Strong and heavy

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9
Q

Which baryon does not decay?

A

Proton

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10
Q

What is the total energy of a particle and antiparticle before the collision?

A

Their rest energies + kinetic energy

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11
Q

What is the rest energy of the products equal to?

A

Total energy before - the kinetic energy of the products.

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12
Q

What is one GeV equal to?

A

1000 MeV

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13
Q

What are mesons?

A

Hadrons that do not include protons in their decay products.

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14
Q

How can leptons change into other leptons?

A

Through the weak interaction.

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15
Q

Are leptons fundamental particles?

A

Yes

16
Q

Which interaction is strangeness conserved in?

A

The strong interaction.

17
Q

Which interaction is strangeness not conserved in?

A

The weak interaction

18
Q

What are the three types of quark?

A

Up, down and strange.

19
Q

What are mesons made up of?

A

A quark and anti-quark.

20
Q

K0?

A

Down and anti-strange.

21
Q

K+?

A

Up and antistrange

22
Q

Pi-?

A

Down and anti-up

23
Q

Pi0?

A

Up and antiup or down and antidown

24
Q

Pi+?

A

Up and anti-down

25
Q

K-?

A

Strange and antiup

26
Q

K0?

A

Strange and antidown

27
Q

How many quarks do baryons have?

A

3

28
Q

What is the quark composition of a proton?

A

Uud

29
Q

What is the quark composition for a neutron?

A

Udd

30
Q

What is conserved during an interaction?

A

Strangeness, charge, lepton number and baryon number.