Accelerators and particle detectors - Institute for Theoretical Physics
Accelerators and particle detectors - Institute for Theoretical Physics
Accelerators and particle detectors - Institute for Theoretical Physics
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Luminosity<br />
Cross section = s<br />
Number of events per second = rate = R<br />
R = L s<br />
L=Luminosity. Characterizes accelerator per<strong>for</strong>mances in [cm -2 s -1 ]<br />
Example:<br />
Consider a e+e- accelerator with N <strong>particle</strong>s per beam turning f times per sec.<br />
Gaussian shaped beam with dimensions sx <strong>and</strong> sy → transverse size = 4psxsy<br />
One electron in one turn crosses N/(4psxsz) positrons<br />
Number of collisions per second<br />
fN 2<br />
4psxsy<br />
Number of events per second<br />
R=<br />
sfN 2<br />
4psxsy<br />
V. Chiochia (Uni. Zürich) – Phenomenology of Particle <strong>Physics</strong>, HS2010<br />
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