KEKB (Electron-positron Accelerator Collider) Free Paper Model
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This is a Electron-positron Accelerator Collider papercraft “KEKB”, it is from legacy.kek. KEKB is the name of a particle accelerator used in the Belle experiment to study CP violation. It is called a B-factory for its copious production of B-mesons which provide a golden mode to study and measure the CP violation due to its property of decaying into other lighter mesons. KEKB is basically an asymmetric electron – positron collider, with electrons having the energy of 8 GeV and positrons having the energy of 3.5 GeV, giving 10.58 GeV centre-of-mass energy, which is equal to the mass of the Upsilon(4S)meson.

KEKB (Electron-positron Accelerator Collider) Free Paper Model

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