Particle Physics, Ch Accelerators and colliders: energy, luminosity and reach
Problem
A proposed electron-positron flavour factory would run at low beam energy (a few GeV per beam) with an instantaneous luminosity L=8×1035cm−2s−1, and would collect data for a total of 1×107s each year once downtime is accounted for.
((a)) Express the integrated luminosity collected in one year in fb−1.
((b)) A process of interest has cross section σ=1.1nb. Estimate how many such events are produced in one year of running.
((c)) State briefly, referring to the E4/r scaling of synchrotron radiation, why radiation loss is not the limiting factor for a ring running at only a few GeV per beam.