particle interactions Flashcards

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1
Q

beta minus decay

A

neutron = proton+electron+antineutrino using w- boson

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2
Q

beta plus decay

A

proton= neutron+positron+neutrino using w+ boson

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3
Q

electron capture

A

proton+electron=neutron+neutrino using w+ boson (both at same time so diagram has flat boson line)

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4
Q

electron proton collisions

A

proton+electron=neutron+neutrino using w- boson going in opposite direction to normal and boson line is flat

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5
Q

name gauge boson and particles affected by the strong force

A

gauge boson: pions and affects hadrons

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6
Q

name gauge boson and particles affected by the electromagnetic force

A

gauge boson: virtual photon and affects charged particles

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7
Q

name gauge boson and particles affected by the weak interaction

A

w+ and w- bosons and affects all types of particles

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8
Q

how do fluorescent tubes work?

A
  • beam of electrons flows through tube
  • these electrons collide with mercury atoms
  • the electrons gain energy become excited then return to ground state
  • uv photons are released
  • these photons are absorbed by electrons in the phosphorus coating
  • the electrons become excited and then return to a lower energy level and emit visible light
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9
Q

when is strangeness conserved?

A

in strong interactions

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10
Q

how is the type of quark changed?

A

weak interaction

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11
Q

when are strange particles created?

A
  • via the strong nuclear interaction

- they are created in pairs because strangeness is conserved in strong interaction ( particle and antiparticle)

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