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Physics > Particle and Nuclear Physics > Flashcards

Particle and Nuclear Physics Flashcards

1
Q

What can a particle be split up into?

A

Hadrons and Leptons

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2
Q

What can a Hadron be split up into?

A

Mesons and Baryons

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3
Q

What is a Baryon?

A

-Proton
-Neutron
-Antineutron
-Antiproton

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4
Q

What is a Meson?

A

Pions consisting of
-pi-
-pi0
-pi+

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5
Q

What is a Lepton?

A

-Electron
-Positron(Anti electron)
-Neutrino
-Antineutrino

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6
Q

What consists of 3 quarks and what are they for each

A

Baryons
-Proton=up,down,down
-Neutron=up,down,down
-Antiproton=anti-up,anti-up,anti-down
-Antineutron=up,down,down

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7
Q

What consists of 2 quarks?

A

Pions
-Pi-=anti-up,down
-Pi0=u,anti-up or down,anti-down
-Pi+=up,anti-down

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8
Q

What 3 laws must be conserved for particles?

A

-Lepton number must be conserved
-Charge must be conserved
-Baryon number must be conserved

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9
Q

Charge and Baryon number for each quark

A

Up=2/3 and 1/3
Down=-1/3 and 1/3
Anti-up=-2/3 and -1/3
Anti-down=1/3 and -1/3

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10
Q

What particles have a baryon number of 1

A

If they are only classified as a baryon, so Leptons and Mesons excluded

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11
Q

Lepton charges and Numbers

A

Electron=-1 and +1
Neutrino=0 and +1
Positiron=1 and -1
Antineutrino=0 and -1

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12
Q

What is change in flavour

A

When a quark in the equation is changed

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13
Q

What is a beta-minus decay?

A

Releasing an electron

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14
Q

What is a beta-plus decay?

A

Releases a positron

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15
Q

Gravitational force

A

All particles are affected, the range is infinite and it is very weak so it can be ignored

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16
Q

Electromagnetic force

A

Charged particles are affected, the range is infinite,usually affect hadrons due to consisting of charged quarks . If any of em spectrum is mentioned that this force is present due to photons

17
Q

Strong force

A

Quarks are affected, the range is short and usually applies to baryons and mesons as leptons dont contain quarks

18
Q

Weak force

A

All particles affected,very short range and usually applies to neutrinos and if there is a change in flavour

Physics (15 decks)

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