Fundamental particles
Particle quarks Baryon Strangeness Charge
number
n
ddu
+
p
uud
Σdds
uuu
uud
udd
ddd
Particle quarks Baryon Strangeness Charge
number
+
̅
π
πQuark
u
d
s
c
b
t
Charge
+2/3
-1/3
-1/3
+2/3
-1/3
+2/3
1. Fill in the baryon number, strangeness and charge for the particles in the tables above.
2. The last three particles are all Δ particles. Δ+, Δ++, Δ-, Δo. Put the names in the correct rows
3. Show that baryon number and charge are conserved in the following interactions
Σ → +
Δ
→
+
Δ →
+
4. Why isn’t strangeness number conserved in the first interaction?
© Chris Hamper, InThinking
www.thinkib.net/physics
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