2.3 (CONSERVATION LAWS AND PARTICLE INTERACTIONS) Flashcards
(18 cards)
What are the four fundamental interactions?
Gravity
Electromagnetism
Strong Nuclear (or Strong Interaction)
Weak Nuclear
Range of gravity?
Infinite
Range of electromagnitism?
Infinite
Range of weak force?
10^-18m
Range of strong force
3 femto meters (10^-15)
Which particles does gravity affect?
Particles with mass
Which particles does strong force affect?
Hadrons
Which particles does weak force affect?
All
Which particles does electromagnetic interaction affect?
only affects particles with charge
What are the exchange particles of strong fundamental interactions?
Pions(between nucleons)
Gluons (between quarks)
What are the exchange particles of weak fundamental interactions?
W+
W-
Z0
What are the exchange particles of electromagnetic fundamental interactions?
Photons
Properties of the photon
It has no mass
It has no charge
It is its own antiparticle
β– decay equation, basic and quark with exchange particle
basic:
n -> p + (e-) + _V_e
quark:
d -> u + (e-) + _V_e
exchange particle:
W-
β+ decay equation, basic and quark with exchange particle
basic:
p -> n +(e+) + Ve
quark:
u-> d + (e+) + Ve
exchange particle:
W+
Electron capture equation, basic and quark with exchange particle
Basic:
p + (e-) -> n + Ve
quark:
u + (e-) -> d + Ve
exchange particle:
W+
Electron-proton collision equation, basic and quark with exchange particle
Basic:
p + (e-) -> n + Ve
quark:
u + (e-) -> d + Ve
exchange particle:
W-
Describe a fenyman diagram
Time on Y-axis
space on x- axis
Particles-Straight lines
Exchange particles- wavy lines
Each line must have an arrow to denote direction
