Quarks

Question 0

Quarks are the building blocks for what

Answer 0

Hadrons

Question 1

Quarks are …. Particles (like leptons)

Answer 1

Fundamental

Question 2

Baryons have …. Quarks and mesons have ….

Answer 2

3

2

Question 3

What does the strange quark allow you to make

Answer 3

More PARTICLES with the property called STRAGENESS

Question 4

What quarks are the antiparticles of hadrons made from

Answer 4

Antiquarks

Question 5

Quarks are antiquarks have COMPLETE …. Properties

Answer 5

Opposite

Question 6

State the charge of a up, down and strange quark

Answer 6

2/3

• 1/3
• 1/3

Question 7

State the baryon number of an up, down and strange quark

Answer 7

1/3
1/3
1/3

Question 8

State the STRAGENESS of an up, down, and strange quark

Answer 8

0
0
-1

Question 9

Where did evidence of quarks come from

Answer 9

Hitting PROTONS with HIGH-ENERGY ELECTRONS

The way the ELECTRONS scattered showed that there were three CONCENTRATIONS of charge (quarks) inside the proton

Question 10

What quarks are the proton and neutron made up from

Answer 10

Uud

Udd

Question 11

Mesons are a …. And ….

Answer 11

Quark

Antiquark

Question 12

Which meson contains the strange quark

Answer 12

Kaons

Pions are just made form (anti) up & down

Question 13

State what makes up the
Pion+
Pion0
Pion-

Strangeness

Answer 13

U anti-D
U anti-U or D anti-D
D anti-U

Strangeness 0

Question 14

State what makes up the- strangeness of each
Kaon+
Kaon0
Kaon-0
Kaon-

Answer 14

U anti-S 1
D anti-S 1
S anti-D -1
S anti-U -1

Question 15

What is there no such thing as (in terms of quarks)

Answer 15

A free one

Question 16

What happens if you blasted a proton with enough energy-could you separate out the quarks

Answer 16

No
Energy just gets changed into more quarks and antiquarks-pair production (make mesons)

This is called quark confinement (unable to get a quark by itself)

Question 17

What type of interaction changes the quark type

Answer 17

WEAK INTERACTION

Question 18

In terms or quarks, what happens when a neutron changes into a proton via the weak interaction of beta-minus decay

Answer 18

Turning a D quark into a U

Question 19

Name an unstable isotopes which decays by beta-plus emission

Answer 19

Carbon-11

In this case, a PROTON changed to a NEUTRON so a U quark changes to a D

Question 20

State 4 properties which must be conserved in particle interaction

Answer 20

Charge
Baryon number
Strangeness (strong interaction) (weak interaction can change type of quark)
Lepton number (3 types conserved separately)