Classification Of Particles

Question 0

Hadrons aren’t fundamental particles. They’re made up of smaller particles called what

Answer 0

Quarks

Question 1

HADRON are particles that feel the what

Answer 1

STRONG NUCLEAR FORCE

Not all particles can feel it

Question 2

What are the two types of hadrons called

Answer 2

Baryons

Mesons

Question 3

How are baryons and mesons classified

Answer 3

Number of QUARKS that make them up

Question 4

Name 2 baryons

Answer 4

PROTONS & NEUTRONS (nucleons)

Question 5

Name a baryons which isn’t a nucleon

Answer 5

Sigmas (they’re short lived)

Question 6

Name the ONLY stable baryon

Answer 6

Proton (won’t decay as far as we know)

Question 7

All baryons (apart from proton) are unstable so decay to become other particles. What does the particle the baryon ends up as depends on

Answer 7

What it STARTED AS but always includes a PROTON

Question 8

Name 2 antibaryons

Answer 8

ANTIPROTONS and ANTINEUTRONS

Don’t find antibaryons in ordinary matter as they are annihilated when they meet their corresponding particle

Question 9

What is the number of baryons in an interaction called

Answer 9

Baryon number

Question 10

What do the (anti)proton and (anti)neutron each have a baryon number of

Answer 10

+1 (-1)

Question 11

In an interaction, the baryon number on either side of the equation MUST be ….

Answer 11

The same

Question 12

Neutrons decay into what

Answer 12

Protons

Question 13

What type of interaction is beta decay caused by

Answer 13

WEAK interaction

Question 14

When a neutron decays (beta-minus), what does it form

Answer 14

Proton
Electron
Antineutrino

Question 15

Name 2 mesons

Answer 15

Pions & kaons

Question 16

Are all mesons stable or unstable

Answer 16

Unstable

Question 17

State 2 facts about the pions

Answer 17

1) The lightest meson

2) Discovered in cosmic rays

Question 18

Where do you find many pions

Answer 18

In HIGH-ENERGY particle collisions like those studied at the CERN PARTICLE ACCELERATOR

Question 19

Kaons are ….. And more ….. Than pions

Answer 19

Heavier

Unstable

Question 20

What do mesons and baryons interact via

Answer 20

THE STRONG NUCLEAR FORCE

Question 21

What do pion interactions swap

Answer 21

PROTONS with NEUTRONS and NEUTRONS with PROTONS

but leave the overall baryon number the same

Question 22

Leptons are ….. Particles and don’t feel the ….

Answer 22

Fundamental

STRONG NUCLEAR FORCE

Question 23

How do leptons only really interact via

Answer 23

Weak interaction

Along with a bit of gravitational force and the electromagnetic force as well if they’re charged

Question 24

Name the 3 types of leptons

Answer 24

Electrons

Muon & Tau (heavier electrons)

Question 25

…. Are stable, ….. And ….. Are unstable

Answer 25

Electrons
Muons
Tau

Question 26

What do muons and taus decay eventually into

Answer 26

Ordinary electrons

Question 27

Neutrinos have zero what

Answer 27

MASS (almost) & ELECTRIC CHARGE

Question 28

Neutrinos only take part in what type of interaction

Answer 28

Weak interaction

A neutrino can pass right through the earth without anything happening to it

Question 29

What is each laptop given a lepton number of

Answer 29

1

Le,Lmue,Ltau (separately)

Question 30

What is the charge of a lepton

Answer 30

-1

Unless it is a (stated lepton)-neutrino where the charge would be 0