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Decay of a Top Quark to a W Boson and a B Quark

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A top quark with mass Mtop = 170 GeV/c2 decays to a W boson (MW = 80 GeV/c2) and a b quark with mass (Mb = 5 GeV ).

(a) Find the momentum and energy of each of the daughter particles if a top quark decays at rest.
(b)What is the highest momentum W boson that can arise from the decay of a top quark that has energy Etop = 250 GeV ?

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This solution discusses the decay of a top quark.

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