An electron-positron collider runs with symmetric beam energies of E(e+) = E(e¯) = 102 GeV. At each orbit AE = 2.2 GeV has to be replaced for each beam particle by the accelerating units. The accelerator has 24 units available; each unit can replace an energy of AE = 100 MeV per orbit. a) State the mechanism responsible for the energy loss and state how the energy loss per orbit scales with the beam energy. b) The researchers want to create the Standard-Model Higgs boson but don't know its mass yet. Argue why the production rate via the direct process ete →H is negligible and name the process which can be used instead. Draw a Feynman diagram of this process. [6 marks]
An electron-positron collider runs with symmetric beam energies of E(e+) = E(e¯) = 102 GeV. At each orbit AE = 2.2 GeV has to be replaced for each beam particle by the accelerating units. The accelerator has 24 units available; each unit can replace an energy of AE = 100 MeV per orbit. a) State the mechanism responsible for the energy loss and state how the energy loss per orbit scales with the beam energy. b) The researchers want to create the Standard-Model Higgs boson but don't know its mass yet. Argue why the production rate via the direct process ete →H is negligible and name the process which can be used instead. Draw a Feynman diagram of this process. [6 marks]
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