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Physics Year 1 content > Particle Zoo > Flashcards

Particle Zoo Flashcards

1
Q

what are leptons?

A

light particles

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2
Q

what are mesons?

A

medium weight particles

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3
Q

what are baryons?

A

heavy particles

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4
Q

what are the 6 quantities that must be conserved?

A 
B - baryon number 
L - lepton number 
Q - charge
S - strangeness
energy and momentum must always be conserved too
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5
Q

what are the leptons required to know?

A 
electron
positron
electron neutrino
antielectron neutrino
muon
antimuon
muon neutrino
antimuon neutrino
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6
Q

What are the mesons required to know?

A 
negative pion
positive pion
neutral pion
negative kaon
positive kaon
neutral kaon
antineutral kaon
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7
Q

what are the baryons required to know?

A

proton
antiproton
neutron
antineutron

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8
Q

what is the extra lepton rule?

A

A particle is always balanced with its neutrino so if there is an electron involved then there will be an electron neutrino.

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9
Q

Which particles are always the most stable?

A

the lightest ones.

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10
Q

how many quarks are baryons made of?

A

3 quarks or 3 antiquarks

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11
Q

how many quarks are mesons made of?

A

1 quark and 1 antiquark

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12
Q

what is the quark beta decay?

A

down (gives) up + electron + antielectron neutrino

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13
Q

what is the attractive range of the strong nuclear force

A

0.5-3fm

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14
Q

what is the repulsive range of the strong nuclear force

A

<0.5fm

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15
Q

what does gravity act on and what is its range?

A

everything with an infinite range

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16
Q

what does the electromagnetic force act on and what is its range?

A

charged particles with an infinite range

17
Q

what does the strong force act on and what is its range?

A

anything containing quarks with < 10^-15 fm range

18
Q

what does the weak force act on and what is its range?

A

hadrons, leptons and quarks with a range of < 10^-18 fm

19
Q

what is special about the weak force?

A

it is the only force that can cause a change in flavour

20
Q

what is the gauge boson for beta minus decay?

A

w-

21
Q

what is the gauge boson for beta plus decay?

A

w+

22
Q

what is the equation for beta plus decay?

A

proton (gives) neutron + electron + electron neutrino

23
Q

what is the equation for electron capture?

A

proton + electron (gives) neutron + electron neutrino

24
Q

what is the equation for electron-proton collision?

A

proton +electron (gives) neutro + electron neutrino

Physics Year 1 content (23 decks)

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