Quarks Flashcards
Quarks are the building blocks for what
Hadrons
Quarks are …. Particles (like leptons)
Fundamental
Baryons have …. Quarks and mesons have ….
3
2
What does the strange quark allow you to make
More PARTICLES with the property called STRAGENESS
What quarks are the antiparticles of hadrons made from
Antiquarks
Quarks are antiquarks have COMPLETE …. Properties
Opposite
State the charge of a up, down and strange quark
2/3
- 1/3
- 1/3
State the baryon number of an up, down and strange quark
1/3
1/3
1/3
State the STRAGENESS of an up, down, and strange quark
0
0
-1
Where did evidence of quarks come from
Hitting PROTONS with HIGH-ENERGY ELECTRONS
The way the ELECTRONS scattered showed that there were three CONCENTRATIONS of charge (quarks) inside the proton
What quarks are the proton and neutron made up from
Uud
Udd
Mesons are a …. And ….
Quark
Antiquark
Which meson contains the strange quark
Kaons
Pions are just made form (anti) up & down
State what makes up the
Pion+
Pion0
Pion-
Strangeness
U anti-D
U anti-U or D anti-D
D anti-U
Strangeness 0
State what makes up the- strangeness of each Kaon+ Kaon0 Kaon-0 Kaon-
U anti-S 1
D anti-S 1
S anti-D -1
S anti-U -1
What is there no such thing as (in terms of quarks)
A free one
What happens if you blasted a proton with enough energy-could you separate out the quarks
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)
What type of interaction changes the quark type
WEAK INTERACTION
In terms or quarks, what happens when a neutron changes into a proton via the weak interaction of beta-minus decay
Turning a D quark into a U
Name an unstable isotopes which decays by beta-plus emission
Carbon-11
In this case, a PROTON changed to a NEUTRON so a U quark changes to a D
State 4 properties which must be conserved in particle interaction
Charge
Baryon number
Strangeness (strong interaction) (weak interaction can change type of quark)
Lepton number (3 types conserved separately)
