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Particle Physics
Particle Physics
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An inital look at particle physics and the standard model
Flashcards
50 cards
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Practice quiz
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Questions
50
Answers
1
In this decay reaction, what are the lepton numbers on the right hand side (RHS)?
Le = +1 ; Lu = +1 ; LT = 0
Le = -1 + 1 = 0 ; Lu = -1 ; LT = 0
Le = -1 + 1 = 0 ; Lu = +1 ; LT = 0
Le = -1 ; Lu = -1 ; LT = 0
2
If a meson has a red quark, the other particle/s in it must be
red
blue
antired
yellow and blue
3
Which type of particles does NOT obey Pauli Exclusion Principle?
Fermions
Muons
Bosons
Leptons
4
How many different flavours of quarks are there?
4
8
6
12
5
What are the possible the quantum spin number of fermions?
s = 1, 2, 3, 4.... whole number integers
s = 0, 1/2, 3/2, 5/2.... 1/2 integers
s = 1/2, 3/2, 5/2.... 1/2 integers
s = 0, 1, 2, 3, 4.... whole number integers
6
When hadrons are also fermions, they are called...
bazzas
baryons
bayons
bayrons
7
Based on our current standard model, all matter is made up of ....
quarks and leptons
quarks
quarks and gauge bosons
quarks and baryons
8
What are the gauge bosons for the weak force?
W+, W- , Z0
W+, W- , Z+, Z-
Z+, Z- , W0
W0, W- , Z0
9
Quarks and leptons can be seperated into ________ generations.
4
2
3
NONE - it's a trick question - there are NO generations!
10
What is the physics basis for Pauli's prediction of this new particle?
Conservation of Lepton number
Conservation of Energy
Conservation of Atomic Weight
Conservation of Mass
11
The names of the quarks are - up, down, top, bottom, _____________ and ____________.
strange ; charm
red ; blue
strong ; weak
weird ; cool
12
This reaction does not occur. Which quantum number is not conserved?
Strangeness
Charge
Spin
13
Which two forces act in the nucleus?
Strong Force & Gravitational Force
Weak Force & Electromagnetic Force
Strong Force & Electromagnetic Force
Strong Force & Weak Force
14
If a particle is made of 3 antiquarks, it must be ...
a baryon
an antimeson
an antibaryon
a meson
15
State the quantum baryon numbers for -
electrons
,
protons
,
antineutron
0, 1, -1
-1, 1, 0
1, -1, 0
1, 0, -1
16
What is the gauge boson for the strong force?
glueion
strongon
gluball
gluon
17
The leptons are grouped into _________ families.
Trick question - there's only 1 family!
4
2
3
18
What is the symbol for quantum spin number?
B
L
S (upper case)
s (lower case)
19
In Feynman Diagrams, at the vertex, you must have ...
two line arrows going in.
one line arrow going in and two line arrow going out.
two line arrows going out.
one line arrow going in and one line arrow going out.
20
When hadrons are also bosons, they are called...
mesions
mesons
muons
misons
21
What is the symbol for strangeness quantum number?
B
S (upper case)
L
s (lower case)
22
From which type of decay, do we find this predicted particle by Wolfgang Pauli?
antimatter decay
alpha decay
beta decay
gamma decay
23
A __________ particle experiences the strong force as its dominant force.
Lepton
Hadron
Tau
Neutrino
24
What is the symbol for lepton number?
S (upper case)
q
L
B
25
The quark combination to form proton must be
ddd
ddu
uud
uuu
26
What is NOT a valid name for an antimuon?
μ+
μ-
μ with a bar over the top
27
Are the lepton numbers conserved on both sides?
Yes
No
28
If a particle has s = 1/2 , q = +1 and is predominantly affect by the weak force, it is ...
a coupon
a meson
a baryon
a lepton
29
What is the symbol for baryon number?
q
S (upper case)
L
B
30
In this decay reaction, what are the lepton numbers on the left hand side (LHS)?
L = +1
Lu = -1
L = -1
Lu = +1
31
In particle interactions, _____________ are the force carriers that are exchanged.
higgs bosons
huge bosons
great bosons
gauge bosons
32
In a Feynman Diagram, the wiggly line represents the...
Higgs boson
antiparticles
Gauge boson
particles
33
State the quantum lepton numbers for -
positron
,
tau neutrino
,
protons
0, 1, -1
1, 0, -1
-1, 1, 0
1, -1, 0
34
In Feynman Diagram, the vertical axis is __________ and the horizontal is ________
Speed ; Time
Time ; Space
Particle ; Antiparticle
Space ; Time
35
State the baryon number on the LHS and RHS.
LHS = 0 ; RHS = 0
LHS = +2 ; RHS = +3
LHS = +2 ; RHS = 1
LHS = -2 ; RHS = -1
36
What are the possible the quantum spin number of bosons?
s = 0, 1, 2, 3, 4.... whole number integers
s = 0, 1/2, 3/2, 5/2.... 1/2 integers
s = 1/2, 3/2, 5/2.... 1/2 integers
s = 1, 2, 3, 4.... whole number integers
37
In a Feynman Diagram, it doesn't make sense to have
lines that are not connected together
lines that are connected together
wiggly lines
straight lines that point backwards in time
38
The leptons are grouped into families called...
particle, antiparticle and neutrino
electron, muon and tau
electron, proton and neutron
boson, fermion and neutrino
39
In a Feynman Diagram, where the lines join is called a __________ and respresents a _________.
variable ; a particle interaction
vertex ; a particle interaction
vortex ; a particle interaction
vertix ; a particle interaction
40
A __________ particle experiences the weak force ONLY as its dominant force.
Hadron
Proton
Lepton
Kaon
41
What is the yet to be found gauge boson for the gravitational force?
gravityon
graviton
gravity
gravitational waves
42
There are ___________ lepton particles.
12
6
200
3
43
It is impossible for a lepton to be a boson because....
all leptons' spin = 1/2 integers but bosons' spin = 0,1,2...
all bosons' spin = 1/2 integers but leptons' spin = 0,1,2...
all bosons have +ve charge but all leptons have -ve charge
all leptons have +ve charge but all bosons have -ve charge
44
Name the 4 fundamental forces of the universe.
Gravitational, electrostatic, weak nuclear & strong nuclear
Gravitational, electromagnetic, weak & strong
Gravity, electromagnetic, weak & strong
Gravity, electrostatic, weak nuclear & strong nuclear
45
What is the gauge boson for the electromagnetic force?
pion
photon
meson
muon
46
The quark combination to form neutron must be
ddu
ddd
uuu
uud
47
For a particle interaction to occur, it can violate ____ (number) of conservation laws.
It's a trick question - it CANNOT violate ANY of them!
2
1
3 but only if 1 of them is a quantum number.
48
What is the name of the particle predicted by Wolfgang Pauli?
electron
neutrino
pion
positron
49
What is the symbol for charge quantum number?
L
B
S (upper case)
q
50
All stable matter is made up of quarks and leptons in the _______ generation. They are the...
1st ; up , charm & top quark AND electron, muon & tau
1st ; up & down quark AND electron & electron neutrino
2nd ; charm & strange quark AND muon & muon neutrino
3rd ; top & bottom quark AND tau & tau neutrino
