Basic Particles & Properties Flashcards
leptons known as…
“light-weight”
mesons known as…
“middle-weight”
baryons known as…
“heavy-weight”
The existence of anti-particles first hinted at by…
…Dirac’s equation describing free electrons with energy given by relativistic formula;
E^2-p^2c^2 = m^2c^4
this formula yields corresponding positive and negative energy solutions.
Spin 1/2 Particles
Leptons
Quarks
Baryons
Spin 1 Particles
1) Mediators:
Strong--> gluons EM--> photons Weak --> W(+/-) and Z(0)
2) Vector Mesons
Spin 3/2 Particles
Heavy Baryons
First Generation Leptons
electron (-1 charge)
electron neutrino (charge neutral)
Second Generation Leptons
muon (-1 charge)
muon neutrino (charge neutral)
Third Generation Leptons
tau (-1 charge)
tau neutrino (charge neutral)
First Generation Quarks
down flavor (-1/3 charge)
up flavor (2/3 charge)
Second Generation Quarks
strange flavor (-1/3 charge)
charm flavor (2/3 charge)
Third Generation Quarks
bottom flavor (-1/3 charge)
top flavor (2/3 charge)
Spin 0 Particles
Pseudoscalar Mesons
Proton Quark Content & Charge
uud
+1 charge
Neutron Quark Content & Charge
udd
charge neutral
Lambda Baryon Quark Content & Charge
uds
charge neutral
Sigma(+) Baryon Quark Content and Charge
uus
+1 charge
Sigma(0) Baryon Quark Content & Charge
uds
charge neutral
Sigma (-) Baryon Quark Content & Charge
dds
-1 charge
Xi(0) Baryon Quark Content & Charge
uss
charge neutral
Xi(-) Quark Content & Charge
dss
-1 charge
Lambda_c (+) Baryon Quark Content & Charge
udc
+1 charge
Delta Baryon Quark Content & Charge
uuu +2 charge
uud +1 charge
udd neutral charge
ddd -1 charge
Sigma(*) Baryon Quark Content & Charge
uus +1 charge
uds charge neutral
dds -1 charge
Xi(*) Baryon Quark Content & Charge
uss charge neutral
dss -1 charge
Omega(-) Baryon Quark Content and Charge
sss
-1 charge
