2.2 - Particle Sorting

Question 1

What do leptons react using

Answer 1

every interaction except strong interaction
(electromagnetic, Weak interaction , gravitational interaction)

Question 2

What do Hadrons react using

Answer 2

Strong interaction
(all 4 fundamental interactions)
strong interactions and and through the electromagnetic interaction if charged

Question 3

Apart from a proton which is stable what do hadrons tend to decay through

Answer 3

the weak interaction

Question 4

What is the large hadron collider

Answer 4

Ring shaped accelerator that boosts the kinetic energy go the charged particles in the ring at several places round it.
Fixed magnets all the way round the ring bend the path of the particles to keep them in the ring .

Question 5

The total energy of the particles and the anti particles

Answer 5

= their rest energy + their kinetic energy

Question 6

The total energy of the new particles and antiparticles after the collision

Answer 6

= Their rest energy + their kinetic energy

Question 7

(using the conservation of energy)
the rest energy of the products =

Answer 7

total energy before - Kinetic energy of the products

Question 8

what does 1Gev =

Answer 8

1000Mev

Question 9

What happens when kaons are created

Answer 9

short lived particles with greater rest mass than protons may also be produced. These are created through strong interaction so are hadrons
these can decay into protons and pions but kaons can’t go into protons

Question 10

baryons

Answer 10

made of 3 quarks
protons and all other hadrons that decay into protons either directly or indirectly

Question 11

Mesons

Answer 11

Made of 2 quarks
are hadrons that do not include protons in their decay products
e.g kaons and pions

Question 12

What are baryons and mesons composed of

Answer 12

quarks and antiquarks