Introduction to Heavy Ion Physics
Introduction to Heavy Ion Physics
Introduction to Heavy Ion Physics
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Invariant cross-section<br />
• A + B a 1 + a 2 + … + a n<br />
• we may be interested only in the production of a specific type of<br />
particle e.g.:<br />
Pb + Pb W + X<br />
• Differential cross section:<br />
• but d 3 p is not Lorentz invariant; is used instead:<br />
3<br />
d p<br />
E<br />
dp<br />
x<br />
dp<br />
y<br />
dy<br />
<br />
d<br />
d<br />
3<br />
<br />
3<br />
p W<br />
d 3<br />
p<br />
E<br />
Lorentz-invariant for a boost along z<br />
8-th Summer School on Nuclear <strong>Physics</strong>, 3-12/07/12<br />
100
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