At Super KEKB it is planned to collide 4 GeV positrons with 7 GeV electrons to form
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At Super KEKB it is planned to collide 4 GeV positrons with 7 GeV electrons to form Υ(4S) particles. If the latter decay to B± particles with equal energies, how far will they travel on average before decaying? (The B± particles have masses of 5.28 GeV/c2 and lifetimes of 1.64 × 10−12 s.)
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