particle interactions

Question 1

What type of interaction can only hadrons undergo

Answer 1

-the strong interaction

Question 2

what type of interaction are strange particles such as kaons produced through

Answer 2

-the weak interaction

Question 3

what do advancements in particle physics rely on?

Answer 3

collaborative efforts of large teams of scientists and engineers to validate new knowledge through peer review or use of particle accelerators

Question 4

why is there a minimum energy in pair production?

Answer 4

as the energy of the photon needs to provide the rest masses of particles

Question 5

state the products of the decay of an anti down quark

Answer 5

anti up–quark plus positron plus electron neutrino

Question 6

state two properties of strange particles

Answer 6

usually produced in pairs
contains at least one strange quark
usually decays via the weak interaction

Question 7

What is an antiparticle

Answer 7

Antiparticle for every particle type
They have equal rest mass
Equal and opposite charge if charged

Question 8

what are the three decays for a kaon

Answer 8

pions
muon and antineutrino
antimuon and neutrino

Question 9

what are the two decays for a charged pion

Answer 9

muon and antineutrino

anitmuon and neutrino

Question 10

what is the decay for a neutral pion

Answer 10

high energy photons

Question 11

what is the decay for a muon

Answer 11

electron and antineutrino

Question 12

what is the decay for an antimuon

Answer 12

positron and neutrino

Question 13

what is conserved in particle interactions

Answer 13

momentum
energy
lepton and baryon numbers 
charge 
strangeness

Question 14

what is a photon

Answer 14

a packet of electromagnetic waves

Question 15

what is an isotope

Answer 15

a particle with the same proton number but a different number of neutrons

Question 16

what is the strong nuclear force

Answer 16

the force that holds the nucleons in a nucleus together

it overcomes the electrostatic force of repulsion between protons

Question 17

what are the key points about the strong nuclear force

Answer 17

range no more than 3-4 fm
attractive force at 3-4 fm down to 0.5 fm seperations smaller than that it is repulsive
same effect on two protons than on two neutrons and a proton and a neutron

Question 18

what is annhilation

Answer 18

the process that occurs when a particle and anti particle meet and interact
two photons are produced in this process

Question 19

what is pair production

Answer 19

the process of when a photon creates a particle and it’s corresponding anti particle

Question 20

what is a hadron

Answer 20

particles and antiparticles that can interact through the strong interaction

Question 21

what is a lepton

Answer 21

particles and antiparticles that can’t interact through the strong interaction

Question 22

through what type of interaction to hadrons decay through

Answer 22

hadrons except for the proton decay via the weak interaction

Question 23

what are the two sub groups of hadrons

Answer 23

Baryons and mesons

Question 24

what are baryons

Answer 24

protons and all other hadrons that decay into protons either directly or indirectly

Question 25

what are mesons

Answer 25

hadrons that do not include protons in their decay products

Question 26

why were neutrinos hypothesised

Answer 26

to account for the energy that was not conserved in beta minus decay
as energy levels before and after the decay did not show energy was conserved

Question 27

what is the purpose of exchange particles

Answer 27

to carry energy and momentum between the particles experiencing the force